Packages

class Stack[A] extends ArrayDeque[A] with IndexedSeqOps[A, Stack, Stack[A]] with StrictOptimizedSeqOps[A, Stack, Stack[A]] with IterableFactoryDefaults[A, Stack] with ArrayDequeOps[A, Stack, Stack[A]] with Cloneable[Stack[A]] with DefaultSerializable

A stack implements a data structure which allows to store and retrieve objects in a last-in-first-out (LIFO) fashion.

Note that operations which consume and produce iterables preserve order, rather than reversing it (as would be expected from building a new stack by pushing an element at a time).

A

type of the elements contained in this stack.

Annotations
@migration
Migration

(Changed in version 2.13.0) Stack is now based on an ArrayDeque instead of a linked list

Source
Stack.scala
Type Hierarchy
Ordering
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Inherited
  1. Stack
  2. ArrayDeque
  3. DefaultSerializable
  4. Serializable
  5. ArrayDequeOps
  6. StrictOptimizedSeqOps
  7. StrictOptimizedIterableOps
  8. IndexedBuffer
  9. IndexedSeq
  10. IndexedSeqOps
  11. IndexedSeq
  12. IndexedSeqOps
  13. AbstractBuffer
  14. Buffer
  15. Shrinkable
  16. Growable
  17. Clearable
  18. AbstractSeq
  19. Seq
  20. SeqOps
  21. Cloneable
  22. Cloneable
  23. Iterable
  24. AbstractSeq
  25. Seq
  26. Equals
  27. SeqOps
  28. PartialFunction
  29. Function1
  30. AbstractIterable
  31. Iterable
  32. IterableFactoryDefaults
  33. IterableOps
  34. IterableOnceOps
  35. IterableOnce
  36. AnyRef
  37. Any
Implicitly
  1. by UnliftOps
  2. by iterableOnceExtensionMethods
  3. by any2stringadd
  4. by StringFormat
  5. by Ensuring
  6. by ArrowAssoc
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new Stack(initialSize: Int = ArrayDeque.DefaultInitialSize)
  2. new Stack(array: Array[AnyRef], start: Int, end: Int)

    Attributes
    protected

Value Members

  1. final def !=(arg0: Any): Boolean

    Test two objects for inequality.

    Test two objects for inequality.

    returns

    true if !(this == that), false otherwise.

    Definition Classes
    AnyRef → Any
  2. final def ##: Int

    Equivalent to x.hashCode except for boxed numeric types and null.

    Equivalent to x.hashCode except for boxed numeric types and null. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. For null returns a hashcode where null.hashCode throws a NullPointerException.

    returns

    a hash value consistent with ==

    Definition Classes
    AnyRef → Any
  3. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from Stack[A] toany2stringadd[Stack[A]] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. final def ++[B >: A](suffix: IterableOnce[B]): Stack[B]

    Alias for concat

    Alias for concat

    Definition Classes
    IterableOps
    Annotations
    @inline()
  5. final def ++:[B >: A](prefix: IterableOnce[B]): Stack[B]

    Alias for prependedAll

    Alias for prependedAll

    Definition Classes
    SeqOpsIterableOps
    Annotations
    @inline()
  6. final def ++=(xs: IterableOnce[A]): Stack.this.type

    Alias for addAll

    Alias for addAll

    Definition Classes
    Growable
    Annotations
    @inline()
  7. final def ++=:(elems: IterableOnce[A]): Stack.this.type

    Alias for prependAll

    Alias for prependAll

    Definition Classes
    Buffer
    Annotations
    @inline()
  8. final def +:[B >: A](elem: B): Stack[B]

    Alias for prepended.

    Alias for prepended.

    Note that :-ending operators are right associative (see example). A mnemonic for +: vs. :+ is: the COLon goes on the COLlection side.

    Definition Classes
    SeqOps
    Annotations
    @inline()
  9. final def +=(elem: A): Stack.this.type

    Alias for addOne

    Alias for addOne

    Definition Classes
    Growable
    Annotations
    @inline()
  10. final def +=:(elem: A): Stack.this.type

    Alias for prepend

    Alias for prepend

    Definition Classes
    Buffer
    Annotations
    @inline()
  11. final def --=(xs: IterableOnce[A]): Stack.this.type

    Alias for subtractAll

    Alias for subtractAll

    Definition Classes
    Shrinkable
    Annotations
    @inline()
  12. final def -=(elem: A): Stack.this.type

    Alias for subtractOne

    Alias for subtractOne

    Definition Classes
    Shrinkable
    Annotations
    @inline()
  13. def ->[B](y: B): (Stack[A], B)
    Implicit
    This member is added by an implicit conversion from Stack[A] toArrowAssoc[Stack[A]] performed by method ArrowAssoc in scala.Predef.This conversion will take place only if A is a subclass of Option[Nothing] (A <: Option[Nothing]).
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  14. final def :+[B >: A](elem: B): Stack[B]

    Alias for appended

    Alias for appended

    Note that :-ending operators are right associative (see example). A mnemonic for +: vs. :+ is: the COLon goes on the COLlection side.

    Definition Classes
    SeqOps
    Annotations
    @inline()
  15. final def :++[B >: A](suffix: IterableOnce[B]): Stack[B]

    Alias for appendedAll

    Alias for appendedAll

    Definition Classes
    SeqOps
    Annotations
    @inline()
  16. final def ==(arg0: Any): Boolean

    The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).

    The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    Definition Classes
    AnyRef → Any
  17. def addAll(elems: IterableOnce[A]): Stack.this.type

    Adds all elements produced by an IterableOnce to this stack.

    Adds all elements produced by an IterableOnce to this stack.

    returns

    the stack itself.

    Definition Classes
    ArrayDequeGrowable
  18. def addOne(elem: A): Stack.this.type

    Adds a single element to this stack.

    Adds a single element to this stack.

    elem

    the element to add.

    returns

    the stack itself

    Definition Classes
    ArrayDequeGrowable
  19. final def addString(b: StringBuilder): b.type

    Appends all elements of this stack to a string builder.

    Appends all elements of this stack to a string builder. The written text consists of the string representations (w.r.t. the method toString) of all elements of this stack without any separator string.

    Example:

    scala> val a = List(1,2,3,4)
    a: List[Int] = List(1, 2, 3, 4)
    
    scala> val b = new StringBuilder()
    b: StringBuilder =
    
    scala> val h = a.addString(b)
    h: StringBuilder = 1234
    b

    the string builder to which elements are appended.

    returns

    the string builder b to which elements were appended.

    Definition Classes
    IterableOnceOps
    Annotations
    @inline()
  20. final def addString(b: StringBuilder, sep: String): b.type

    Appends all elements of this stack to a string builder using a separator string.

    Appends all elements of this stack to a string builder using a separator string. The written text consists of the string representations (w.r.t. the method toString) of all elements of this stack, separated by the string sep.

    Example:

    scala> val a = List(1,2,3,4)
    a: List[Int] = List(1, 2, 3, 4)
    
    scala> val b = new StringBuilder()
    b: StringBuilder =
    
    scala> a.addString(b, ", ")
    res0: StringBuilder = 1, 2, 3, 4
    b

    the string builder to which elements are appended.

    sep

    the separator string.

    returns

    the string builder b to which elements were appended.

    Definition Classes
    IterableOnceOps
    Annotations
    @inline()
  21. def addString(b: StringBuilder, start: String, sep: String, end: String): b.type

    Appends all elements of this stack to a string builder using start, end, and separator strings.

    Appends all elements of this stack to a string builder using start, end, and separator strings. The written text begins with the string start and ends with the string end. Inside, the string representations (w.r.t. the method toString) of all elements of this stack are separated by the string sep.

    Example:

    scala> val a = List(1,2,3,4)
    a: List[Int] = List(1, 2, 3, 4)
    
    scala> val b = new StringBuilder()
    b: StringBuilder =
    
    scala> a.addString(b , "List(" , ", " , ")")
    res5: StringBuilder = List(1, 2, 3, 4)
    b

    the string builder to which elements are appended.

    start

    the starting string.

    sep

    the separator string.

    end

    the ending string.

    returns

    the string builder b to which elements were appended.

    Definition Classes
    IterableOnceOps
  22. def andThen[C](k: PartialFunction[A, C]): PartialFunction[Int, C]

    Composes this partial function with another partial function that gets applied to results of this partial function.

    Composes this partial function with another partial function that gets applied to results of this partial function.

    Note that calling isDefinedAt on the resulting partial function may apply the first partial function and execute its side effect. For efficiency, it is recommended to call applyOrElse instead of isDefinedAt or apply.

    C

    the result type of the transformation function.

    k

    the transformation function

    returns

    a partial function with the domain of this partial function narrowed by other partial function, which maps arguments x to k(this(x)).

    Definition Classes
    PartialFunction
  23. def andThen[C](k: (A) => C): PartialFunction[Int, C]

    Composes this partial function with a transformation function that gets applied to results of this partial function.

    Composes this partial function with a transformation function that gets applied to results of this partial function.

    If the runtime type of the function is a PartialFunction then the other andThen method is used (note its cautions).

    C

    the result type of the transformation function.

    k

    the transformation function

    returns

    a partial function with the domain of this partial function, possibly narrowed by the specified function, which maps arguments x to k(this(x)).

    Definition Classes
    PartialFunctionFunction1
  24. final def append(elem: A): Stack.this.type

    Appends the given elements to this buffer.

    Appends the given elements to this buffer.

    elem

    the element to append.

    Definition Classes
    Buffer
    Annotations
    @inline()
  25. final def appendAll(xs: IterableOnce[A]): Stack.this.type

    Appends the elements contained in a iterable object to this buffer.

    Appends the elements contained in a iterable object to this buffer.

    xs

    the iterable object containing the elements to append.

    Definition Classes
    Buffer
    Annotations
    @inline()
  26. def appended[B >: A](elem: B): Stack[B]

    A copy of this stack with an element appended.

    A copy of this stack with an element appended.

    Example:

    scala> val a = List(1)
    a: List[Int] = List(1)
    
    scala> val b = a :+ 2
    b: List[Int] = List(1, 2)
    
    scala> println(a)
    List(1)
    B

    the element type of the returned stack.

    elem

    the appended element

    returns

    a new stack consisting of all elements of this stack followed by value.

    Definition Classes
    StrictOptimizedSeqOpsSeqOps
  27. def appendedAll[B >: A](suffix: IterableOnce[B]): Stack[B]

    Returns a new stack containing the elements from the left hand operand followed by the elements from the right hand operand.

    Returns a new stack containing the elements from the left hand operand followed by the elements from the right hand operand. The element type of the stack is the most specific superclass encompassing the element types of the two operands.

    B

    the element type of the returned collection.

    suffix

    the iterable to append.

    returns

    a new collection of type CC[B] which contains all elements of this stack followed by all elements of suffix.

    Definition Classes
    StrictOptimizedSeqOpsSeqOps
  28. def apply(idx: Int): A

    Get the element at the specified index.

    Get the element at the specified index. This operation is provided for convenience in Seq. It should not be assumed to be efficient unless you have an IndexedSeq.

    Definition Classes
    ArrayDequeSeqOpsFunction1
  29. def applyOrElse[A1 <: Int, B1 >: A](x: A1, default: (A1) => B1): B1

    Applies this partial function to the given argument when it is contained in the function domain.

    Applies this partial function to the given argument when it is contained in the function domain. Applies fallback function where this partial function is not defined.

    Note that expression pf.applyOrElse(x, default) is equivalent to

    if(pf isDefinedAt x) pf(x) else default(x)

    except that applyOrElse method can be implemented more efficiently. For all partial function literals the compiler generates an applyOrElse implementation which avoids double evaluation of pattern matchers and guards. This makes applyOrElse the basis for the efficient implementation for many operations and scenarios, such as:

    • combining partial functions into orElse/andThen chains does not lead to excessive apply/isDefinedAt evaluation
    • lift and unlift do not evaluate source functions twice on each invocation
    • runWith allows efficient imperative-style combining of partial functions with conditionally applied actions

    For non-literal partial function classes with nontrivial isDefinedAt method it is recommended to override applyOrElse with custom implementation that avoids double isDefinedAt evaluation. This may result in better performance and more predictable behavior w.r.t. side effects.

    x

    the function argument

    default

    the fallback function

    returns

    the result of this function or fallback function application.

    Definition Classes
    PartialFunction
  30. var array: Array[AnyRef]
    Attributes
    protected
    Definition Classes
    ArrayDequeArrayDequeOps
  31. final def asInstanceOf[T0]: T0

    Cast the receiver object to be of type T0.

    Cast the receiver object to be of type T0.

    Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression 1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expression List(1).asInstanceOf[List[String]] will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested type.

    returns

    the receiver object.

    Definition Classes
    Any
    Exceptions thrown

    ClassCastException if the receiver object is not an instance of the erasure of type T0.

  32. def canEqual(that: Any): Boolean

    A method that should be called from every well-designed equals method that is open to be overridden in a subclass.

    A method that should be called from every well-designed equals method that is open to be overridden in a subclass. See Programming in Scala, Chapter 28 for discussion and design.

    that

    the value being probed for possible equality

    returns

    true if this instance can possibly equal that, otherwise false

    Definition Classes
    SeqEquals
  33. def className: String

    Defines the prefix of this object's toString representation.

    Defines the prefix of this object's toString representation.

    It is recommended to return the name of the concrete collection type, but not implementation subclasses. For example, for ListMap this method should return "ListMap", not "Map" (the supertype) or "Node" (an implementation subclass).

    The default implementation returns "Iterable". It is overridden for the basic collection kinds "Seq", "IndexedSeq", "LinearSeq", "Buffer", "Set", "Map", "SortedSet", "SortedMap" and "View".

    returns

    a string representation which starts the result of toString applied to this stack. By default the string prefix is the simple name of the collection class stack.

    Attributes
    protected[this]
    Definition Classes
    Iterable
  34. def clear(): Unit

    Note: This does not actually resize the internal representation.

    Note: This does not actually resize the internal representation. See clearAndShrink if you want to also resize internally

    Definition Classes
    ArrayDequeClearable
  35. def clearAndShrink(size: Int = ArrayDeque.DefaultInitialSize): Stack.this.type

    Clears this buffer and shrinks to @param size

    Clears this buffer and shrinks to @param size

    Definition Classes
    ArrayDeque
  36. final def clone(): Stack[A]

    Create a copy of the receiver object.

    Create a copy of the receiver object.

    The default implementation of the clone method is platform dependent.

    returns

    a copy of the receiver object.

    Definition Classes
    ArrayDequeOps → AnyRef
    Note

    not specified by SLS as a member of AnyRef

  37. final def coll: Stack.this.type

    returns

    This collection as a C.

    Attributes
    protected
    Definition Classes
    IterableIterableOps
  38. def collect[B](pf: PartialFunction[A, B]): Stack[B]

    Builds a new stack by applying a partial function to all elements of this stack on which the function is defined.

    Builds a new stack by applying a partial function to all elements of this stack on which the function is defined.

    B

    the element type of the returned stack.

    pf

    the partial function which filters and maps the stack.

    returns

    a new stack resulting from applying the given partial function pf to each element on which it is defined and collecting the results. The order of the elements is preserved.

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
  39. def collectFirst[B](pf: PartialFunction[A, B]): Option[B]

    Finds the first element of the stack for which the given partial function is defined, and applies the partial function to it.

    Finds the first element of the stack for which the given partial function is defined, and applies the partial function to it.

    pf

    the partial function

    returns

    an option value containing pf applied to the first value for which it is defined, or None if none exists.

    Definition Classes
    IterableOnceOps
    Example:
    1. Seq("a", 1, 5L).collectFirst({ case x: Int => x*10 }) = Some(10)

  40. def combinations(n: Int): Iterator[Stack[A]]

    Iterates over combinations of elements.

    Iterates over combinations of elements.

    A combination of length n is a sequence of n elements selected in order of their first index in this sequence.

    For example, "xyx" has two combinations of length 2. The x is selected first: "xx", "xy". The sequence "yx" is not returned as a combination because it is subsumed by "xy".

    If there is more than one way to generate the same combination, only one will be returned.

    For example, the result "xy" arbitrarily selected one of the x elements.

    As a further illustration, "xyxx" has three different ways to generate "xy" because there are three elements x to choose from. Moreover, there are three unordered pairs "xx" but only one is returned.

    It is not specified which of these equal combinations is returned. It is an implementation detail that should not be relied on. For example, the combination "xx" does not necessarily contain the first x in this sequence. This behavior is observable if the elements compare equal but are not identical.

    As a consequence, "xyx".combinations(3).next() is "xxy": the combination does not reflect the order of the original sequence, but the order in which elements were selected, by "first index"; the order of each x element is also arbitrary.

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    returns

    An Iterator which traverses the n-element combinations of this stack.

    Definition Classes
    SeqOps
    Example:
    1. Seq('a', 'b', 'b', 'b', 'c').combinations(2).foreach(println)
      // List(a, b)
      // List(a, c)
      // List(b, b)
      // List(b, c)
      Seq('b', 'a', 'b').combinations(2).foreach(println)
      // List(b, b)
      // List(b, a)
  41. def compose[R](k: PartialFunction[R, Int]): PartialFunction[R, A]

    Composes another partial function k with this partial function so that this partial function gets applied to results of k.

    Composes another partial function k with this partial function so that this partial function gets applied to results of k.

    Note that calling isDefinedAt on the resulting partial function may apply the first partial function and execute its side effect. For efficiency, it is recommended to call applyOrElse instead of isDefinedAt or apply.

    R

    the parameter type of the transformation function.

    k

    the transformation function

    returns

    a partial function with the domain of other partial function narrowed by this partial function, which maps arguments x to this(k(x)).

    Definition Classes
    PartialFunction
  42. def compose[A](g: (A) => Int): (A) => A

    Composes two instances of Function1 in a new Function1, with this function applied last.

    Composes two instances of Function1 in a new Function1, with this function applied last.

    A

    the type to which function g can be applied

    g

    a function A => T1

    returns

    a new function f such that f(x) == apply(g(x))

    Definition Classes
    Function1
    Annotations
    @unspecialized()
  43. final def concat[B >: A](suffix: IterableOnce[B]): Stack[B]

    Returns a new stack containing the elements from the left hand operand followed by the elements from the right hand operand.

    Returns a new stack containing the elements from the left hand operand followed by the elements from the right hand operand. The element type of the stack is the most specific superclass encompassing the element types of the two operands.

    B

    the element type of the returned collection.

    suffix

    the iterable to append.

    returns

    a new stack which contains all elements of this stack followed by all elements of suffix.

    Definition Classes
    SeqOpsIterableOps
    Annotations
    @inline()
  44. def contains[A1 >: A](elem: A1): Boolean

    Tests whether this stack contains a given value as an element.

    Tests whether this stack contains a given value as an element.

    elem

    the element to test.

    returns

    true if this stack has an element that is equal (as determined by ==) to elem, false otherwise.

    Definition Classes
    SeqOps
  45. def containsSlice[B >: A](that: collection.Seq[B]): Boolean

    Tests whether this stack contains a given sequence as a slice.

    Tests whether this stack contains a given sequence as a slice.

    that

    the sequence to test

    returns

    true if this stack contains a slice with the same elements as that, otherwise false.

    Definition Classes
    SeqOps
  46. def copySliceToArray(srcStart: Int, dest: Array[_], destStart: Int, maxItems: Int): dest.type

    This is a more general version of copyToArray - this also accepts a srcStart unlike copyToArray This copies maxItems elements from this collections srcStart to dest's destStart If we reach the end of either collections before we could copy maxItems, we simply stop copying

    This is a more general version of copyToArray - this also accepts a srcStart unlike copyToArray This copies maxItems elements from this collections srcStart to dest's destStart If we reach the end of either collections before we could copy maxItems, we simply stop copying

    Definition Classes
    ArrayDequeOps
  47. def copyToArray[B >: A](dest: Array[B], destStart: Int, len: Int): Int

    Copy elements to an array, returning the number of elements written.

    Copy elements to an array, returning the number of elements written.

    Fills the given array xs starting at index start with at most len elements of this stack.

    Copying will stop once either all the elements of this stack have been copied, or the end of the array is reached, or len elements have been copied.

    B

    the type of the elements of the array.

    len

    the maximal number of elements to copy.

    returns

    the number of elements written to the array

    Definition Classes
    ArrayDequeIterableOnceOps
    Note

    Reuse: After calling this method, one should discard the iterator it was called on. Using it is undefined and subject to change.

  48. def copyToArray[B >: A](xs: Array[B], start: Int): Int

    Copy elements to an array, returning the number of elements written.

    Copy elements to an array, returning the number of elements written.

    Fills the given array xs starting at index start with values of this stack.

    Copying will stop once either all the elements of this stack have been copied, or the end of the array is reached.

    B

    the type of the elements of the array.

    xs

    the array to fill.

    start

    the starting index of xs.

    returns

    the number of elements written to the array

    Definition Classes
    IterableOnceOps
    Annotations
    @deprecatedOverriding()
    Note

    Reuse: After calling this method, one should discard the iterator it was called on. Using it is undefined and subject to change.

  49. def copyToArray[B >: A](xs: Array[B]): Int

    Copy elements to an array, returning the number of elements written.

    Copy elements to an array, returning the number of elements written.

    Fills the given array xs starting at index start with values of this stack.

    Copying will stop once either all the elements of this stack have been copied, or the end of the array is reached.

    B

    the type of the elements of the array.

    xs

    the array to fill.

    returns

    the number of elements written to the array

    Definition Classes
    IterableOnceOps
    Annotations
    @deprecatedOverriding()
    Note

    Reuse: After calling this method, one should discard the iterator it was called on. Using it is undefined and subject to change.

  50. def corresponds[B](that: collection.Seq[B])(p: (A, B) => Boolean): Boolean

    Tests whether every element of this stack relates to the corresponding element of another sequence by satisfying a test predicate.

    Tests whether every element of this stack relates to the corresponding element of another sequence by satisfying a test predicate.

    B

    the type of the elements of that

    that

    the other sequence

    p

    the test predicate, which relates elements from both sequences

    returns

    true if both sequences have the same length and p(x, y) is true for all corresponding elements x of this stack and y of that, otherwise false.

    Definition Classes
    SeqOps
  51. def corresponds[B](that: IterableOnce[B])(p: (A, B) => Boolean): Boolean

    Tests whether every element of this collection's iterator relates to the corresponding element of another collection by satisfying a test predicate.

    Tests whether every element of this collection's iterator relates to the corresponding element of another collection by satisfying a test predicate.

    B

    the type of the elements of that

    that

    the other collection

    p

    the test predicate, which relates elements from both collections

    returns

    true if both collections have the same length and p(x, y) is true for all corresponding elements x of this iterator and y of that, otherwise false

    Definition Classes
    IterableOnceOps
  52. def count(p: (A) => Boolean): Int

    Counts the number of elements in the stack which satisfy a predicate.

    Counts the number of elements in the stack which satisfy a predicate.

    p

    the predicate used to test elements.

    returns

    the number of elements satisfying the predicate p.

    Definition Classes
    IterableOnceOps
  53. def diff[B >: A](that: collection.Seq[B]): Stack[A]

    Computes the multiset difference between this stack and another sequence.

    Computes the multiset difference between this stack and another sequence.

    that

    the sequence of elements to remove

    returns

    a new stack which contains all elements of this stack except some of occurrences of elements that also appear in that. If an element value x appears n times in that, then the first n occurrences of x will not form part of the result, but any following occurrences will.

    Definition Classes
    StrictOptimizedSeqOpsSeqOps
  54. def distinct: Stack[A]

    Selects all the elements of this stack ignoring the duplicates.

    Selects all the elements of this stack ignoring the duplicates.

    returns

    a new stack consisting of all the elements of this stack without duplicates.

    Definition Classes
    SeqOps
  55. def distinctBy[B](f: (A) => B): Stack[A]

    Selects all the elements of this stack ignoring the duplicates as determined by == after applying the transforming function f.

    Selects all the elements of this stack ignoring the duplicates as determined by == after applying the transforming function f.

    B

    the type of the elements after being transformed by f

    f

    The transforming function whose result is used to determine the uniqueness of each element

    returns

    a new stack consisting of all the elements of this stack without duplicates.

    Definition Classes
    StrictOptimizedSeqOpsSeqOps
  56. def drop(n: Int): Stack[A]

    Selects all elements except first n ones.

    Selects all elements except first n ones.

    n

    the number of elements to drop from this stack.

    returns

    a stack consisting of all elements of this stack except the first n ones, or else the empty stack, if this stack has less than n elements. If n is negative, don't drop any elements.

    Definition Classes
    IndexedSeqOpsIterableOpsIterableOnceOps
  57. def dropInPlace(n: Int): Stack.this.type
    Definition Classes
    Buffer
  58. def dropRight(n: Int): Stack[A]

    The rest of the collection without its n last elements.

    The rest of the collection without its n last elements. For linear, immutable collections this should avoid making a copy.

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    n

    the number of elements to drop from this stack.

    returns

    a stack consisting of all elements of this stack except the last n ones, or else the empty stack, if this stack has less than n elements. If n is negative, don't drop any elements.

    Definition Classes
    StrictOptimizedIterableOpsIterableOps
  59. def dropRightInPlace(n: Int): Stack.this.type
    Definition Classes
    Buffer
  60. def dropWhile(p: (A) => Boolean): Stack[A]

    Drops longest prefix of elements that satisfy a predicate.

    Drops longest prefix of elements that satisfy a predicate.

    p

    The predicate used to test elements.

    returns

    the longest suffix of this stack whose first element does not satisfy the predicate p.

    Definition Classes
    IterableOpsIterableOnceOps
  61. def dropWhileInPlace(p: (A) => Boolean): Stack.this.type
    Definition Classes
    Buffer
  62. def elementWise: ElementWiseExtractor[Int, A]

    Returns an extractor object with a unapplySeq method, which extracts each element of a sequence data.

    Returns an extractor object with a unapplySeq method, which extracts each element of a sequence data.

    Definition Classes
    PartialFunction
    Example:
    1. val firstChar: String => Option[Char] = _.headOption
      
      Seq("foo", "bar", "baz") match {
        case firstChar.unlift.elementWise(c0, c1, c2) =>
          println(s"$c0, $c1, $c2") // Output: f, b, b
      }
  63. def empty: Stack[A]

    The empty iterable of the same type as this iterable

    The empty iterable of the same type as this iterable

    returns

    an empty iterable of type C.

    Definition Classes
    IterableFactoryDefaultsIterableOps
  64. def endsWith[B >: A](that: collection.Iterable[B]): Boolean

    Tests whether this stack ends with the given sequence.

    Tests whether this stack ends with the given sequence.

    that

    the sequence to test

    returns

    true if this stack has that as a suffix, false otherwise.

    Definition Classes
    SeqOps
  65. def ensureSize(hint: Int): Unit
    Definition Classes
    ArrayDeque
    Annotations
    @inline()
  66. def ensuring(cond: (Stack[A]) => Boolean, msg: => Any): Stack[A]
    Implicit
    This member is added by an implicit conversion from Stack[A] toEnsuring[Stack[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  67. def ensuring(cond: (Stack[A]) => Boolean): Stack[A]
    Implicit
    This member is added by an implicit conversion from Stack[A] toEnsuring[Stack[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  68. def ensuring(cond: Boolean, msg: => Any): Stack[A]
    Implicit
    This member is added by an implicit conversion from Stack[A] toEnsuring[Stack[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  69. def ensuring(cond: Boolean): Stack[A]
    Implicit
    This member is added by an implicit conversion from Stack[A] toEnsuring[Stack[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  70. final def eq(arg0: AnyRef): Boolean

    Tests whether the argument (that) is a reference to the receiver object (this).

    Tests whether the argument (that) is a reference to the receiver object (this).

    The eq method implements an equivalence relation on non-null instances of AnyRef, and has three additional properties:

    • It is consistent: for any non-null instances x and y of type AnyRef, multiple invocations of x.eq(y) consistently returns true or consistently returns false.
    • For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false.
    • null.eq(null) returns true.

    When overriding the equals or hashCode methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).

    returns

    true if the argument is a reference to the receiver object; false otherwise.

    Definition Classes
    AnyRef
  71. def equals(o: Any): Boolean

    The universal equality method defined in AnyRef.

    The universal equality method defined in AnyRef.

    Definition Classes
    SeqEquals → AnyRef → Any
  72. def exists(p: (A) => Boolean): Boolean

    Tests whether a predicate holds for at least one element of this stack.

    Tests whether a predicate holds for at least one element of this stack.

    p

    the predicate used to test elements.

    returns

    true if the given predicate p is satisfied by at least one element of this stack, otherwise false

    Definition Classes
    IterableOnceOps
  73. def filter(pred: (A) => Boolean): Stack[A]

    Selects all elements of this stack which satisfy a predicate.

    Selects all elements of this stack which satisfy a predicate.

    returns

    a new stack consisting of all elements of this stack that satisfy the given predicate p. The order of the elements is preserved.

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
  74. def filterImpl(pred: (A) => Boolean, isFlipped: Boolean): Stack[A]
    Attributes
    protected[collection]
    Definition Classes
    StrictOptimizedIterableOps
  75. def filterInPlace(p: (A) => Boolean): Stack.this.type
    Definition Classes
    IndexedBuffer
  76. def filterNot(pred: (A) => Boolean): Stack[A]

    Selects all elements of this stack which do not satisfy a predicate.

    Selects all elements of this stack which do not satisfy a predicate.

    pred

    the predicate used to test elements.

    returns

    a new stack consisting of all elements of this stack that do not satisfy the given predicate pred. Their order may not be preserved.

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
  77. def finalize(): Unit

    Called by the garbage collector on the receiver object when there are no more references to the object.

    Called by the garbage collector on the receiver object when there are no more references to the object.

    The details of when and if the finalize method is invoked, as well as the interaction between finalize and non-local returns and exceptions, are all platform dependent.

    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
    Note

    not specified by SLS as a member of AnyRef

  78. def find(p: (A) => Boolean): Option[A]

    Finds the first element of the stack satisfying a predicate, if any.

    Finds the first element of the stack satisfying a predicate, if any.

    p

    the predicate used to test elements.

    returns

    an option value containing the first element in the stack that satisfies p, or None if none exists.

    Definition Classes
    IterableOnceOps
  79. def findLast(p: (A) => Boolean): Option[A]

    Finds the last element of the stack satisfying a predicate, if any.

    Finds the last element of the stack satisfying a predicate, if any.

    p

    the predicate used to test elements.

    returns

    an option value containing the last element in the stack that satisfies p, or None if none exists.

    Definition Classes
    SeqOps
  80. def flatMap[B](f: (A) => IterableOnce[B]): Stack[B]

    Builds a new stack by applying a function to all elements of this stack and using the elements of the resulting collections.

    Builds a new stack by applying a function to all elements of this stack and using the elements of the resulting collections.

    For example:

    def getWords(lines: Seq[String]): Seq[String] = lines flatMap (line => line split "\\W+")

    The type of the resulting collection is guided by the static type of stack. This might cause unexpected results sometimes. For example:

    // lettersOf will return a Seq[Char] of likely repeated letters, instead of a Set
    def lettersOf(words: Seq[String]) = words flatMap (word => word.toSet)
    
    // lettersOf will return a Set[Char], not a Seq
    def lettersOf(words: Seq[String]) = words.toSet flatMap ((word: String) => word.toSeq)
    
    // xs will be an Iterable[Int]
    val xs = Map("a" -> List(11,111), "b" -> List(22,222)).flatMap(_._2)
    
    // ys will be a Map[Int, Int]
    val ys = Map("a" -> List(1 -> 11,1 -> 111), "b" -> List(2 -> 22,2 -> 222)).flatMap(_._2)
    B

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

    a new stack resulting from applying the given collection-valued function f to each element of this stack and concatenating the results.

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
  81. def flatMapInPlace(f: (A) => IterableOnce[A]): Stack.this.type
    Definition Classes
    IndexedBuffer
  82. def flatten[B](implicit toIterableOnce: (A) => IterableOnce[B]): Stack[B]

    Converts this stack of iterable collections into a stack formed by the elements of these iterable collections.

    Converts this stack of iterable collections into a stack formed by the elements of these iterable collections.

    The resulting collection's type will be guided by the type of stack. For example:

    val xs = List(
               Set(1, 2, 3),
               Set(1, 2, 3)
             ).flatten
    // xs == List(1, 2, 3, 1, 2, 3)
    
    val ys = Set(
               List(1, 2, 3),
               List(3, 2, 1)
             ).flatten
    // ys == Set(1, 2, 3)
    B

    the type of the elements of each iterable collection.

    returns

    a new stack resulting from concatenating all element stacks.

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
  83. def fold[A1 >: A](z: A1)(op: (A1, A1) => A1): A1

    Folds the elements of this stack using the specified associative binary operator.

    Folds the elements of this stack using the specified associative binary operator. The default implementation in IterableOnce is equivalent to foldLeft but may be overridden for more efficient traversal orders.

    The order in which operations are performed on elements is unspecified and may be nondeterministic.

    A1

    a type parameter for the binary operator, a supertype of A.

    z

    a neutral element for the fold operation; may be added to the result an arbitrary number of times, and must not change the result (e.g., Nil for list concatenation, 0 for addition, or 1 for multiplication).

    op

    a binary operator that must be associative.

    returns

    the result of applying the fold operator op between all the elements and z, or z if this stack is empty.

    Definition Classes
    IterableOnceOps
  84. def foldLeft[B](z: B)(op: (B, A) => B): B

    Applies a binary operator to a start value and all elements of this stack, going left to right.

    Applies a binary operator to a start value and all elements of this stack, going left to right.

    B

    the result type of the binary operator.

    z

    the start value.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this stack, going left to right with the start value z on the left: op(...op(z, x1), x2, ..., xn) where x1, ..., xn are the elements of this stack. Returns z if this stack is empty.

    Definition Classes
    IterableOnceOps
  85. def foldRight[B](z: B)(op: (A, B) => B): B

    Applies a binary operator to all elements of this stack and a start value, going right to left.

    Applies a binary operator to all elements of this stack and a start value, going right to left.

    B

    the result type of the binary operator.

    z

    the start value.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this stack, going right to left with the start value z on the right: op(x1, op(x2, ... op(xn, z)...)) where x1, ..., xn are the elements of this stack. Returns z if this stack is empty.

    Definition Classes
    IndexedSeqOpsIterableOnceOps
  86. def forall(p: (A) => Boolean): Boolean

    Tests whether a predicate holds for all elements of this stack.

    Tests whether a predicate holds for all elements of this stack.

    p

    the predicate used to test elements.

    returns

    true if this stack is empty or the given predicate p holds for all elements of this stack, otherwise false.

    Definition Classes
    IterableOnceOps
  87. def foreach[U](f: (A) => U): Unit

    Apply f to each element for its side effects Note: [U] parameter needed to help scalac's type inference.

    Apply f to each element for its side effects Note: [U] parameter needed to help scalac's type inference.

    Definition Classes
    IterableOnceOps
  88. def fromSpecific(coll: IterableOnce[A]): Stack[A]

    Defines how to turn a given Iterable[A] into a collection of type C.

    Defines how to turn a given Iterable[A] into a collection of type C.

    This process can be done in a strict way or a non-strict way (ie. without evaluating the elements of the resulting collections). In other words, this methods defines the evaluation model of the collection.

    Attributes
    protected
    Definition Classes
    IterableFactoryDefaultsIterableOps
    Note

    When implementing a custom collection type and refining C to the new type, this method needs to be overridden (the compiler will issue an error otherwise). In the common case where C =:= CC[A], this can be done by mixing in the scala.collection.IterableFactoryDefaults trait, which implements the method using iterableFactory.

    ,

    As witnessed by the @uncheckedVariance annotation, using this method might be unsound. However, as long as it is called with an Iterable[A] obtained from this collection (as it is the case in the implementations of operations where we use a View[A]), it is safe.

  89. final def getClass(): Class[_ <: AnyRef]

    Returns the runtime class representation of the object.

    Returns the runtime class representation of the object.

    returns

    a class object corresponding to the runtime type of the receiver.

    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  90. def groupBy[K](f: (A) => K): immutable.Map[K, Stack[A]]

    Partitions this stack into a map of stacks according to some discriminator function.

    Partitions this stack into a map of stacks according to some discriminator function.

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    K

    the type of keys returned by the discriminator function.

    f

    the discriminator function.

    returns

    A map from keys to stacks such that the following invariant holds:

    (xs groupBy f)(k) = xs filter (x => f(x) == k)

    That is, every key k is bound to a stack of those elements x for which f(x) equals k.

    Definition Classes
    IterableOps
  91. def groupMap[K, B](key: (A) => K)(f: (A) => B): immutable.Map[K, Stack[B]]

    Partitions this stack into a map of stacks according to a discriminator function key.

    Partitions this stack into a map of stacks according to a discriminator function key. Each element in a group is transformed into a value of type B using the value function.

    It is equivalent to groupBy(key).mapValues(_.map(f)), but more efficient.

    case class User(name: String, age: Int)
    
    def namesByAge(users: Seq[User]): Map[Int, Seq[String]] =
      users.groupMap(_.age)(_.name)

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    K

    the type of keys returned by the discriminator function

    B

    the type of values returned by the transformation function

    key

    the discriminator function

    f

    the element transformation function

    Definition Classes
    IterableOps
  92. def groupMapReduce[K, B](key: (A) => K)(f: (A) => B)(reduce: (B, B) => B): immutable.Map[K, B]

    Partitions this stack into a map according to a discriminator function key.

    Partitions this stack into a map according to a discriminator function key. All the values that have the same discriminator are then transformed by the f function and then reduced into a single value with the reduce function.

    It is equivalent to groupBy(key).mapValues(_.map(f).reduce(reduce)), but more efficient.

    def occurrences[A](as: Seq[A]): Map[A, Int] =
      as.groupMapReduce(identity)(_ => 1)(_ + _)

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    Definition Classes
    IterableOps
  93. def grouped(n: Int): Iterator[Stack[A]]

    Partitions elements in fixed size stacks.

    Partitions elements in fixed size stacks.

    returns

    An iterator producing stacks of size size, except the last will be less than size size if the elements don't divide evenly.

    Definition Classes
    ArrayDequeOpsIterableOps
    See also

    scala.collection.Iterator, method grouped

  94. def hashCode(): Int

    The hashCode method for reference types.

    The hashCode method for reference types. See hashCode in scala.Any.

    returns

    the hash code value for this object.

    Definition Classes
    Seq → AnyRef → Any
  95. def head: A

    Selects the first element of this stack.

    Selects the first element of this stack.

    returns

    the first element of this stack.

    Definition Classes
    IndexedSeqOpsIterableOps
    Exceptions thrown

    NoSuchElementException if the stack is empty.

  96. def headOption: Option[A]

    Optionally selects the first element.

    Optionally selects the first element.

    returns

    the first element of this stack if it is nonempty, None if it is empty.

    Definition Classes
    IndexedSeqOpsIterableOps
  97. def indexOf[B >: A](elem: B): Int

    Finds index of first occurrence of some value in this stack.

    Finds index of first occurrence of some value in this stack.

    B

    the type of the element elem.

    elem

    the element value to search for.

    returns

    the index >= 0 of the first element of this stack that is equal (as determined by ==) to elem, or -1, if none exists.

    Definition Classes
    SeqOps
    Annotations
    @deprecatedOverriding()
  98. def indexOf[B >: A](elem: B, from: Int): Int

    Finds index of first occurrence of some value in this stack after or at some start index.

    Finds index of first occurrence of some value in this stack after or at some start index.

    B

    the type of the element elem.

    elem

    the element value to search for.

    from

    the start index

    returns

    the index >= from of the first element of this stack that is equal (as determined by ==) to elem, or -1, if none exists.

    Definition Classes
    SeqOps
  99. def indexOfSlice[B >: A](that: collection.Seq[B]): Int

    Finds first index where this stack contains a given sequence as a slice.

    Finds first index where this stack contains a given sequence as a slice.

    that

    the sequence to test

    returns

    the first index >= 0 such that the elements of this stack starting at this index match the elements of sequence that, or -1 if no such subsequence exists.

    Definition Classes
    SeqOps
    Annotations
    @deprecatedOverriding()
  100. def indexOfSlice[B >: A](that: collection.Seq[B], from: Int): Int

    Finds first index after or at a start index where this stack contains a given sequence as a slice.

    Finds first index after or at a start index where this stack contains a given sequence as a slice.

    that

    the sequence to test

    from

    the start index

    returns

    the first index >= from such that the elements of this stack starting at this index match the elements of sequence that, or -1 if no such subsequence exists.

    Definition Classes
    SeqOps
  101. def indexWhere(p: (A) => Boolean): Int

    Finds index of the first element satisfying some predicate.

    Finds index of the first element satisfying some predicate.

    p

    the predicate used to test elements.

    returns

    the index >= 0 of the first element of this stack that satisfies the predicate p, or -1, if none exists.

    Definition Classes
    SeqOps
    Annotations
    @deprecatedOverriding()
  102. def indexWhere(p: (A) => Boolean, from: Int): Int

    Finds index of the first element satisfying some predicate after or at some start index.

    Finds index of the first element satisfying some predicate after or at some start index.

    p

    the predicate used to test elements.

    from

    the start index

    returns

    the index >= from of the first element of this stack that satisfies the predicate p, or -1, if none exists.

    Definition Classes
    SeqOps
  103. def indices: immutable.Range

    Produces the range of all indices of this sequence.

    Produces the range of all indices of this sequence.

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    returns

    a Range value from 0 to one less than the length of this stack.

    Definition Classes
    SeqOps
  104. def init: Stack[A]

    The initial part of the collection without its last element.

    The initial part of the collection without its last element.

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    Definition Classes
    IterableOps
  105. def inits: Iterator[Stack[A]]

    Iterates over the inits of this stack.

    Iterates over the inits of this stack. The first value will be this stack and the final one will be an empty stack, with the intervening values the results of successive applications of init.

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    returns

    an iterator over all the inits of this stack

    Definition Classes
    IterableOps
    Example:
    1. List(1,2,3).inits = Iterator(List(1,2,3), List(1,2), List(1), Nil)

  106. def insert(idx: Int, elem: A): Unit

    Inserts a new element at a given index into this buffer.

    Inserts a new element at a given index into this buffer.

    idx

    the index where the new elements is inserted.

    elem

    the element to insert.

    Definition Classes
    ArrayDequeBuffer
    Exceptions thrown

    IndexOutOfBoundsException if the index idx is not in the valid range 0 <= idx <= length.

  107. def insertAll(idx: Int, elems: IterableOnce[A]): Unit

    Inserts new elements at the index idx.

    Inserts new elements at the index idx. Opposed to method update, this method will not replace an element with a new one. Instead, it will insert a new element at index idx.

    idx

    the index where a new element will be inserted.

    elems

    the iterable object providing all elements to insert.

    Definition Classes
    ArrayDequeBuffer
    Exceptions thrown

    IndexOutOfBoundsException if idx is out of bounds.

  108. def intersect[B >: A](that: collection.Seq[B]): Stack[A]

    Computes the multiset intersection between this stack and another sequence.

    Computes the multiset intersection between this stack and another sequence.

    that

    the sequence of elements to intersect with.

    returns

    a new stack which contains all elements of this stack which also appear in that. If an element value x appears n times in that, then the first n occurrences of x will be retained in the result, but any following occurrences will be omitted.

    Definition Classes
    StrictOptimizedSeqOpsSeqOps
  109. def isDefinedAt(idx: Int): Boolean

    Tests whether this stack contains given index.

    Tests whether this stack contains given index.

    The implementations of methods apply and isDefinedAt turn a Seq[A] into a PartialFunction[Int, A].

    idx

    the index to test

    returns

    true if this stack contains an element at position idx, false otherwise.

    Definition Classes
    SeqOps
  110. def isEmpty: Boolean

    Tests whether the stack is empty.

    Tests whether the stack is empty.

    Note: The default implementation creates and discards an iterator.

    Note: Implementations in subclasses that are not repeatedly iterable must take care not to consume any elements when isEmpty is called.

    returns

    true if the stack contains no elements, false otherwise.

    Definition Classes
    ArrayDequeSeqOpsIterableOnceOps
  111. final def isInstanceOf[T0]: Boolean

    Test whether the dynamic type of the receiver object has the same erasure as T0.

    Test whether the dynamic type of the receiver object has the same erasure as T0.

    Depending on what T0 is, the test is done in one of the below ways:

    • T0 is a non-parameterized class type, e.g. BigDecimal: this method returns true if the value of the receiver object is a BigDecimal or a subtype of BigDecimal.
    • T0 is a parameterized class type, e.g. List[Int]: this method returns true if the value of the receiver object is some List[X] for any X. For example, List(1, 2, 3).isInstanceOf[List[String]] will return true.
    • T0 is some singleton type x.type or literal x: this method returns this.eq(x). For example, x.isInstanceOf[1] is equivalent to x.eq(1)
    • T0 is an intersection X with Y or X & Y: this method is equivalent to x.isInstanceOf[X] && x.isInstanceOf[Y]
    • T0 is a union X | Y: this method is equivalent to x.isInstanceOf[X] || x.isInstanceOf[Y]
    • T0 is a type parameter or an abstract type member: this method is equivalent to isInstanceOf[U] where U is T0's upper bound, Any if T0 is unbounded. For example, x.isInstanceOf[A] where A is an unbounded type parameter will return true for any value of x.

    This is exactly equivalent to the type pattern _: T0

    returns

    true if the receiver object is an instance of erasure of type T0; false otherwise.

    Definition Classes
    Any
    Note

    due to the unexpectedness of List(1, 2, 3).isInstanceOf[List[String]] returning true and x.isInstanceOf[A] where A is a type parameter or abstract member returning true, these forms issue a warning.

  112. def isTraversableAgain: Boolean

    Tests whether this stack can be repeatedly traversed.

    Tests whether this stack can be repeatedly traversed. Always true for Iterables and false for Iterators unless overridden.

    returns

    true if it is repeatedly traversable, false otherwise.

    Definition Classes
    IterableOpsIterableOnceOps
  113. def iterableFactory: SeqFactory[Stack]

    The companion object of this stack, providing various factory methods.

    The companion object of this stack, providing various factory methods.

    Definition Classes
    StackArrayDequeIndexedBufferIndexedSeqIndexedSeqBufferSeqIterableSeqIterableIterableOps
    Note

    When implementing a custom collection type and refining CC to the new type, this method needs to be overridden to return a factory for the new type (the compiler will issue an error otherwise).

  114. def iterator: Iterator[A]

    Iterator can be used only once

    Iterator can be used only once

    Definition Classes
    IndexedSeqOpsIterableOnce
  115. def klone(): Stack[A]
    Attributes
    protected
    Definition Classes
    StackArrayDequeArrayDequeOps
  116. def knownSize: Int

    returns

    The number of elements in this stack, if it can be cheaply computed, -1 otherwise. Cheaply usually means: Not requiring a collection traversal.

    Definition Classes
    ArrayDequeIndexedSeqOpsBufferGrowableIterableOnce
  117. def last: A

    Selects the last element.

    Selects the last element.

    returns

    The last element of this stack.

    Definition Classes
    IndexedSeqOpsIterableOps
    Exceptions thrown

    NoSuchElementException If the stack is empty.

  118. def lastIndexOf[B >: A](elem: B, end: Int = length - 1): Int

    Finds index of last occurrence of some value in this stack before or at a given end index.

    Finds index of last occurrence of some value in this stack before or at a given end index.

    B

    the type of the element elem.

    elem

    the element value to search for.

    end

    the end index.

    returns

    the index <= end of the last element of this stack that is equal (as determined by ==) to elem, or -1, if none exists.

    Definition Classes
    SeqOps
  119. def lastIndexOfSlice[B >: A](that: collection.Seq[B]): Int

    Finds last index where this stack contains a given sequence as a slice.

    Finds last index where this stack contains a given sequence as a slice.

    that

    the sequence to test

    returns

    the last index such that the elements of this stack starting at this index match the elements of sequence that, or -1 if no such subsequence exists.

    Definition Classes
    SeqOps
    Annotations
    @deprecatedOverriding()
  120. def lastIndexOfSlice[B >: A](that: collection.Seq[B], end: Int): Int

    Finds last index before or at a given end index where this stack contains a given sequence as a slice.

    Finds last index before or at a given end index where this stack contains a given sequence as a slice.

    that

    the sequence to test

    end

    the end index

    returns

    the last index <= end such that the elements of this stack starting at this index match the elements of sequence that, or -1 if no such subsequence exists.

    Definition Classes
    SeqOps
  121. def lastIndexWhere(p: (A) => Boolean): Int

    Finds index of last element satisfying some predicate.

    Finds index of last element satisfying some predicate.

    p

    the predicate used to test elements.

    returns

    the index of the last element of this stack that satisfies the predicate p, or -1, if none exists.

    Definition Classes
    SeqOps
    Annotations
    @deprecatedOverriding()
  122. def lastIndexWhere(p: (A) => Boolean, end: Int): Int

    Finds index of last element satisfying some predicate before or at given end index.

    Finds index of last element satisfying some predicate before or at given end index.

    p

    the predicate used to test elements.

    returns

    the index <= end of the last element of this stack that satisfies the predicate p, or -1, if none exists.

    Definition Classes
    SeqOps
  123. def lastOption: Option[A]

    Optionally selects the last element.

    Optionally selects the last element.

    returns

    the last element of this stack$ if it is nonempty, None if it is empty.

    Definition Classes
    IterableOps
  124. def lazyZip[B](that: collection.Iterable[B]): LazyZip2[A, B, Stack.this.type]

    Analogous to zip except that the elements in each collection are not consumed until a strict operation is invoked on the returned LazyZip2 decorator.

    Analogous to zip except that the elements in each collection are not consumed until a strict operation is invoked on the returned LazyZip2 decorator.

    Calls to lazyZip can be chained to support higher arities (up to 4) without incurring the expense of constructing and deconstructing intermediary tuples.

    val xs = List(1, 2, 3)
    val res = (xs lazyZip xs lazyZip xs lazyZip xs).map((a, b, c, d) => a + b + c + d)
    // res == List(4, 8, 12)
    B

    the type of the second element in each eventual pair

    that

    the iterable providing the second element of each eventual pair

    returns

    a decorator LazyZip2 that allows strict operations to be performed on the lazily evaluated pairs or chained calls to lazyZip. Implicit conversion to Iterable[(A, B)] is also supported.

    Definition Classes
    Iterable
  125. def length: Int

    The length (number of elements) of the stack.

    The length (number of elements) of the stack. size is an alias for length in Seq collections.

    Definition Classes
    ArrayDequeSeqOps
  126. final def lengthCompare(that: collection.Iterable[_]): Int

    Compares the length of this stack to the size of another Iterable.

    Compares the length of this stack to the size of another Iterable.

    that

    the Iterable whose size is compared with this stack's length.

    returns

    A value x where

    x <  0       if this.length <  that.size
    x == 0       if this.length == that.size
    x >  0       if this.length >  that.size

    The method as implemented here does not call length or size directly; its running time is O(this.length min that.size) instead of O(this.length + that.size). The method should be overridden if computing size is cheap and knownSize returns -1.

    Definition Classes
    IndexedSeqOpsSeqOps
  127. final def lengthCompare(len: Int): Int

    Compares the length of this stack to a test value.

    Compares the length of this stack to a test value.

    len

    the test value that gets compared with the length.

    returns

    A value x where

    x <  0       if this.length <  len
    x == 0       if this.length == len
    x >  0       if this.length >  len

    The method as implemented here does not call length directly; its running time is O(length min len) instead of O(length). The method should be overridden if computing length is cheap and knownSize returns -1.

    Definition Classes
    IndexedSeqOpsSeqOps
    See also

    lengthIs

  128. final def lengthIs: SizeCompareOps

    Returns a value class containing operations for comparing the length of this stack to a test value.

    Returns a value class containing operations for comparing the length of this stack to a test value.

    These operations are implemented in terms of lengthCompare(Int), and allow the following more readable usages:

    this.lengthIs < len     // this.lengthCompare(len) < 0
    this.lengthIs <= len    // this.lengthCompare(len) <= 0
    this.lengthIs == len    // this.lengthCompare(len) == 0
    this.lengthIs != len    // this.lengthCompare(len) != 0
    this.lengthIs >= len    // this.lengthCompare(len) >= 0
    this.lengthIs > len     // this.lengthCompare(len) > 0
    Definition Classes
    SeqOps
    Annotations
    @inline()
  129. def lift: (Int) => Option[A]

    Turns this partial function into a plain function returning an Option result.

    Turns this partial function into a plain function returning an Option result.

    returns

    a function that takes an argument x to Some(this(x)) if this is defined for x, and to None otherwise.

    Definition Classes
    PartialFunction
    See also

    Function.unlift

  130. def map[B](f: (A) => B): Stack[B]

    Builds a new stack by applying a function to all elements of this stack.

    Builds a new stack by applying a function to all elements of this stack.

    B

    the element type of the returned stack.

    f

    the function to apply to each element.

    returns

    a new stack resulting from applying the given function f to each element of this stack and collecting the results.

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
  131. def mapInPlace(f: (A) => A): Stack.this.type

    Modifies this stack by applying a function to all elements of this stack.

    Modifies this stack by applying a function to all elements of this stack.

    f

    the function to apply to each element.

    returns

    this stack modified by replacing all elements with the result of applying the given function f to each element of this stack.

    Definition Classes
    IndexedSeqOps
  132. def max[B >: A](implicit ord: math.Ordering[B]): A

    Finds the largest element.

    Finds the largest element.

    B

    The type over which the ordering is defined.

    ord

    An ordering to be used for comparing elements.

    returns

    the largest element of this stack with respect to the ordering ord.

    Definition Classes
    IterableOnceOps
    Exceptions thrown

    UnsupportedOperationException if this stack is empty.

  133. def maxBy[B](f: (A) => B)(implicit ord: math.Ordering[B]): A

    Finds the first element which yields the largest value measured by function f.

    Finds the first element which yields the largest value measured by function f.

    B

    The result type of the function f.

    f

    The measuring function.

    returns

    the first element of this stack with the largest value measured by function f with respect to the ordering cmp.

    Definition Classes
    IterableOnceOps
    Exceptions thrown

    UnsupportedOperationException if this stack is empty.

  134. def maxByOption[B](f: (A) => B)(implicit ord: math.Ordering[B]): Option[A]

    Finds the first element which yields the largest value measured by function f.

    Finds the first element which yields the largest value measured by function f.

    B

    The result type of the function f.

    f

    The measuring function.

    returns

    an option value containing the first element of this stack with the largest value measured by function f with respect to the ordering cmp.

    Definition Classes
    IterableOnceOps
  135. def maxOption[B >: A](implicit ord: math.Ordering[B]): Option[A]

    Finds the largest element.

    Finds the largest element.

    B

    The type over which the ordering is defined.

    ord

    An ordering to be used for comparing elements.

    returns

    an option value containing the largest element of this stack with respect to the ordering ord.

    Definition Classes
    IterableOnceOps
  136. def min[B >: A](implicit ord: math.Ordering[B]): A

    Finds the smallest element.

    Finds the smallest element.

    B

    The type over which the ordering is defined.

    ord

    An ordering to be used for comparing elements.

    returns

    the smallest element of this stack with respect to the ordering ord.

    Definition Classes
    IterableOnceOps
    Exceptions thrown

    UnsupportedOperationException if this stack is empty.

  137. def minBy[B](f: (A) => B)(implicit ord: math.Ordering[B]): A

    Finds the first element which yields the smallest value measured by function f.

    Finds the first element which yields the smallest value measured by function f.

    B

    The result type of the function f.

    f

    The measuring function.

    returns

    the first element of this stack with the smallest value measured by function f with respect to the ordering cmp.

    Definition Classes
    IterableOnceOps
    Exceptions thrown

    UnsupportedOperationException if this stack is empty.

  138. def minByOption[B](f: (A) => B)(implicit ord: math.Ordering[B]): Option[A]

    Finds the first element which yields the smallest value measured by function f.

    Finds the first element which yields the smallest value measured by function f.

    B

    The result type of the function f.

    f

    The measuring function.

    returns

    an option value containing the first element of this stack with the smallest value measured by function f with respect to the ordering cmp.

    Definition Classes
    IterableOnceOps
  139. def minOption[B >: A](implicit ord: math.Ordering[B]): Option[A]

    Finds the smallest element.

    Finds the smallest element.

    B

    The type over which the ordering is defined.

    ord

    An ordering to be used for comparing elements.

    returns

    an option value containing the smallest element of this stack with respect to the ordering ord.

    Definition Classes
    IterableOnceOps
  140. final def mkString: String

    Displays all elements of this stack in a string.

    Displays all elements of this stack in a string.

    Delegates to addString, which can be overridden.

    returns

    a string representation of this stack. In the resulting string the string representations (w.r.t. the method toString) of all elements of this stack follow each other without any separator string.

    Definition Classes
    IterableOnceOps
    Annotations
    @inline()
  141. final def mkString(sep: String): String

    Displays all elements of this stack in a string using a separator string.

    Displays all elements of this stack in a string using a separator string.

    Delegates to addString, which can be overridden.

    sep

    the separator string.

    returns

    a string representation of this stack. In the resulting string the string representations (w.r.t. the method toString) of all elements of this stack are separated by the string sep.

    Definition Classes
    IterableOnceOps
    Annotations
    @inline()
    Example:
    1. List(1, 2, 3).mkString("|") = "1|2|3"

  142. final def mkString(start: String, sep: String, end: String): String

    Displays all elements of this stack in a string using start, end, and separator strings.

    Displays all elements of this stack in a string using start, end, and separator strings.

    Delegates to addString, which can be overridden.

    start

    the starting string.

    sep

    the separator string.

    end

    the ending string.

    returns

    a string representation of this stack. The resulting string begins with the string start and ends with the string end. Inside, the string representations (w.r.t. the method toString) of all elements of this stack are separated by the string sep.

    Definition Classes
    IterableOnceOps
    Example:
    1. List(1, 2, 3).mkString("(", "; ", ")") = "(1; 2; 3)"

  143. final def ne(arg0: AnyRef): Boolean

    Equivalent to !(this eq that).

    Equivalent to !(this eq that).

    returns

    true if the argument is not a reference to the receiver object; false otherwise.

    Definition Classes
    AnyRef
  144. def newSpecificBuilder: Builder[A, Stack[A]]

    returns

    a strict builder for the same collection type. Note that in the case of lazy collections (e.g. scala.collection.View or scala.collection.immutable.LazyList), it is possible to implement this method but the resulting Builder will break laziness. As a consequence, operations should preferably be implemented with fromSpecific instead of this method.

    Attributes
    protected
    Definition Classes
    IterableFactoryDefaultsIterableOps
    Note

    When implementing a custom collection type and refining C to the new type, this method needs to be overridden (the compiler will issue an error otherwise). In the common case where C =:= CC[A], this can be done by mixing in the scala.collection.IterableFactoryDefaults trait, which implements the method using iterableFactory.

    ,

    As witnessed by the @uncheckedVariance annotation, using this method might be unsound. However, as long as the returned builder is only fed with A values taken from this instance, it is safe.

  145. def nonEmpty: Boolean

    Tests whether the stack is not empty.

    Tests whether the stack is not empty.

    returns

    true if the stack contains at least one element, false otherwise.

    Definition Classes
    IterableOnceOps
    Annotations
    @deprecatedOverriding()
  146. final def notify(): Unit

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Definition Classes
    AnyRef
    Annotations
    @native()
    Note

    not specified by SLS as a member of AnyRef

  147. final def notifyAll(): Unit

    Wakes up all threads that are waiting on the receiver object's monitor.

    Wakes up all threads that are waiting on the receiver object's monitor.

    Definition Classes
    AnyRef
    Annotations
    @native()
    Note

    not specified by SLS as a member of AnyRef

  148. def occCounts[B](sq: collection.Seq[B]): Map[B, Int]
    Attributes
    protected[collection]
    Definition Classes
    SeqOps
  149. def ofArray(array: Array[AnyRef], end: Int): Stack[A]
    Attributes
    protected
    Definition Classes
    StackArrayDequeArrayDequeOps
  150. def orElse[A1 <: Int, B1 >: A](that: PartialFunction[A1, B1]): PartialFunction[A1, B1]

    Composes this partial function with a fallback partial function which gets applied where this partial function is not defined.

    Composes this partial function with a fallback partial function which gets applied where this partial function is not defined.

    A1

    the argument type of the fallback function

    B1

    the result type of the fallback function

    that

    the fallback function

    returns

    a partial function which has as domain the union of the domains of this partial function and that. The resulting partial function takes x to this(x) where this is defined, and to that(x) where it is not.

    Definition Classes
    PartialFunction
  151. def padTo[B >: A](len: Int, elem: B): Stack[B]

    A copy of this stack with an element value appended until a given target length is reached.

    A copy of this stack with an element value appended until a given target length is reached.

    B

    the element type of the returned stack.

    len

    the target length

    elem

    the padding value

    returns

    a new stack consisting of all elements of this stack followed by the minimal number of occurrences of elem so that the resulting collection has a length of at least len.

    Definition Classes
    StrictOptimizedSeqOpsSeqOps
  152. def padToInPlace(len: Int, elem: A): Stack.this.type
    Definition Classes
    Buffer
  153. def partition(p: (A) => Boolean): (Stack[A], Stack[A])

    A pair of, first, all elements that satisfy predicate p and, second, all elements that do not.

    A pair of, first, all elements that satisfy predicate p and, second, all elements that do not. Interesting because it splits a collection in two.

    The default implementation provided here needs to traverse the collection twice. Strict collections have an overridden version of partition in StrictOptimizedIterableOps, which requires only a single traversal.

    Definition Classes
    StrictOptimizedIterableOpsIterableOps
  154. def partitionMap[A1, A2](f: (A) => Either[A1, A2]): (Stack[A1], Stack[A2])

    Applies a function f to each element of the stack and returns a pair of stacks: the first one made of those values returned by f that were wrapped in scala.util.Left, and the second one made of those wrapped in scala.util.Right.

    Applies a function f to each element of the stack and returns a pair of stacks: the first one made of those values returned by f that were wrapped in scala.util.Left, and the second one made of those wrapped in scala.util.Right.

    Example:

    val xs = `Stack`(1, "one", 2, "two", 3, "three") partitionMap {
     case i: Int => Left(i)
     case s: String => Right(s)
    }
    // xs == (`Stack`(1, 2, 3),
    //        `Stack`(one, two, three))
    A1

    the element type of the first resulting collection

    A2

    the element type of the second resulting collection

    f

    the 'split function' mapping the elements of this stack to an scala.util.Either

    returns

    a pair of stacks: the first one made of those values returned by f that were wrapped in scala.util.Left, and the second one made of those wrapped in scala.util.Right.

    Definition Classes
    StrictOptimizedIterableOpsIterableOps
  155. def patch[B >: A](from: Int, other: IterableOnce[B], replaced: Int): Stack[B]

    Produces a new stack where a slice of elements in this stack is replaced by another sequence.

    Produces a new stack where a slice of elements in this stack is replaced by another sequence.

    Patching at negative indices is the same as patching starting at 0. Patching at indices at or larger than the length of the original stack appends the patch to the end. If more values are replaced than actually exist, the excess is ignored.

    B

    the element type of the returned stack.

    from

    the index of the first replaced element

    other

    the replacement sequence

    replaced

    the number of elements to drop in the original stack

    returns

    a new stack consisting of all elements of this stack except that replaced elements starting from from are replaced by all the elements of other.

    Definition Classes
    SeqOps
  156. def patchInPlace(from: Int, patch: IterableOnce[A], replaced: Int): Stack.this.type
    Definition Classes
    IndexedBufferBuffer
  157. def permutations: Iterator[Stack[A]]

    Iterates over distinct permutations of elements.

    Iterates over distinct permutations of elements.

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    returns

    An Iterator which traverses the distinct permutations of this stack.

    Definition Classes
    SeqOps
    Example:
    1. Seq('a', 'b', 'b').permutations.foreach(println)
      // List(a, b, b)
      // List(b, a, b)
      // List(b, b, a)
  158. def pop(): A

    Removes the top element from this stack and return it

    Removes the top element from this stack and return it

    Exceptions thrown

    NoSuchElementException when stack is empty

  159. def popAll(): collection.Seq[A]

    Pop all elements from this stack and return it

    Pop all elements from this stack and return it

    returns

    The removed elements

  160. def popWhile(f: (A) => Boolean): collection.Seq[A]

    Returns and removes all elements from the top of this stack which satisfy the given predicate

    Returns and removes all elements from the top of this stack which satisfy the given predicate

    f

    the predicate used for choosing elements

    returns

    The removed elements

  161. def prepend(elem: A): Stack.this.type

    Prepends a single element at the front of this stack.

    Prepends a single element at the front of this stack.

    elem

    the element to add.

    returns

    the stack itself

    Definition Classes
    ArrayDequeBuffer
  162. def prependAll(elems: IterableOnce[A]): Stack.this.type
    Definition Classes
    ArrayDequeBuffer
  163. def prepended[B >: A](elem: B): Stack[B]

    A copy of the stack with an element prepended.

    A copy of the stack with an element prepended.

    Also, the original stack is not modified, so you will want to capture the result.

    Example:

    scala> val x = List(1)
    x: List[Int] = List(1)
    
    scala> val y = 2 +: x
    y: List[Int] = List(2, 1)
    
    scala> println(x)
    List(1)
    B

    the element type of the returned stack.

    elem

    the prepended element

    returns

    a new stack consisting of value followed by all elements of this stack.

    Definition Classes
    StrictOptimizedSeqOpsSeqOps
  164. def prependedAll[B >: A](prefix: IterableOnce[B]): Stack[B]

    As with :++, returns a new collection containing the elements from the left operand followed by the elements from the right operand.

    As with :++, returns a new collection containing the elements from the left operand followed by the elements from the right operand.

    It differs from :++ in that the right operand determines the type of the resulting collection rather than the left one. Mnemonic: the COLon is on the side of the new COLlection type.

    B

    the element type of the returned collection.

    prefix

    the iterable to prepend.

    returns

    a new stack which contains all elements of prefix followed by all the elements of this stack.

    Definition Classes
    StrictOptimizedSeqOpsSeqOps
  165. def product[B >: A](implicit num: math.Numeric[B]): B

    Multiplies together the elements of this collection.

    Multiplies together the elements of this collection.

    The default implementation uses reduce for a known non-empty collection, foldLeft otherwise.

    B

    the result type of the * operator.

    num

    an implicit parameter defining a set of numeric operations which includes the * operator to be used in forming the product.

    returns

    the product of all elements of this stack with respect to the * operator in num.

    Definition Classes
    IterableOnceOps
  166. def push(elem1: A, elem2: A, elems: A*): Stack.this.type

    Push two or more elements onto the stack.

    Push two or more elements onto the stack. The last element of the sequence will be on top of the new stack.

    elems

    the element sequence.

    returns

    the stack with the new elements on top.

  167. def push(elem: A): Stack.this.type

    Add elements to the top of this stack

  168. def pushAll(elems: IterableOnce[A]): Stack.this.type

    Push all elements in the given iterable object onto the stack.

    Push all elements in the given iterable object onto the stack. The last element in the iterable object will be on top of the new stack.

    elems

    the iterable object.

    returns

    the stack with the new elements on top.

  169. def reduce[B >: A](op: (B, B) => B): B

    Reduces the elements of this stack using the specified associative binary operator.

    Reduces the elements of this stack using the specified associative binary operator.

    The order in which operations are performed on elements is unspecified and may be nondeterministic.

    B

    A type parameter for the binary operator, a supertype of A.

    op

    A binary operator that must be associative.

    returns

    The result of applying reduce operator op between all the elements if the stack is nonempty.

    Definition Classes
    IterableOnceOps
    Exceptions thrown

    UnsupportedOperationException if this stack is empty.

  170. def reduceLeft[B >: A](op: (B, A) => B): B

    Applies a binary operator to all elements of this stack, going left to right.

    Applies a binary operator to all elements of this stack, going left to right.

    B

    the result type of the binary operator.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this stack, going left to right: op( op( ... op(x1, x2) ..., xn-1), xn) where x1, ..., xn are the elements of this stack.

    Definition Classes
    IterableOnceOps
    Exceptions thrown

    UnsupportedOperationException if this stack is empty.

  171. def reduceLeftOption[B >: A](op: (B, A) => B): Option[B]

    Optionally applies a binary operator to all elements of this stack, going left to right.

    Optionally applies a binary operator to all elements of this stack, going left to right.

    B

    the result type of the binary operator.

    op

    the binary operator.

    returns

    an option value containing the result of reduceLeft(op) if this stack is nonempty, None otherwise.

    Definition Classes
    IterableOnceOps
  172. def reduceOption[B >: A](op: (B, B) => B): Option[B]

    Reduces the elements of this stack, if any, using the specified associative binary operator.

    Reduces the elements of this stack, if any, using the specified associative binary operator.

    The order in which operations are performed on elements is unspecified and may be nondeterministic.

    B

    A type parameter for the binary operator, a supertype of A.

    op

    A binary operator that must be associative.

    returns

    An option value containing result of applying reduce operator op between all the elements if the collection is nonempty, and None otherwise.

    Definition Classes
    IterableOnceOps
  173. def reduceRight[B >: A](op: (A, B) => B): B

    Applies a binary operator to all elements of this stack, going right to left.

    Applies a binary operator to all elements of this stack, going right to left.

    B

    the result type of the binary operator.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this stack, going right to left: op(x1, op(x2, ..., op(xn-1, xn)...)) where x1, ..., xn are the elements of this stack.

    Definition Classes
    IterableOnceOps
    Exceptions thrown

    UnsupportedOperationException if this stack is empty.

  174. def reduceRightOption[B >: A](op: (A, B) => B): Option[B]

    Optionally applies a binary operator to all elements of this stack, going right to left.

    Optionally applies a binary operator to all elements of this stack, going right to left.

    B

    the result type of the binary operator.

    op

    the binary operator.

    returns

    an option value containing the result of reduceRight(op) if this stack is nonempty, None otherwise.

    Definition Classes
    IterableOnceOps
  175. def remove(idx: Int): A

    Removes the element at a given index position.

    Removes the element at a given index position.

    idx

    the index which refers to the element to delete.

    returns

    the element that was formerly at index idx.

    Definition Classes
    ArrayDequeBuffer
  176. def remove(idx: Int, count: Int): Unit

    Removes the element on a given index position.

    Removes the element on a given index position. It takes time linear in the buffer size.

    idx

    the index which refers to the first element to remove.

    count

    the number of elements to remove.

    Definition Classes
    ArrayDequeBuffer
    Exceptions thrown

    IllegalArgumentException if count < 0.

    IndexOutOfBoundsException if the index idx is not in the valid range 0 <= idx <= length - count (with count > 0).

  177. def removeAll(p: (A) => Boolean): immutable.Seq[A]

    Returns all elements in this collection which satisfy the given predicate and removes those elements from this collections.

    Returns all elements in this collection which satisfy the given predicate and removes those elements from this collections.

    p

    the predicate used for choosing elements

    returns

    a sequence of all elements in the queue for which p yields true.

    Definition Classes
    ArrayDeque
  178. def removeAll(): immutable.Seq[A]

    Remove all elements from this collection and return the elements while emptying this data structure

    Remove all elements from this collection and return the elements while emptying this data structure

    Definition Classes
    ArrayDeque
  179. def removeAllReverse(): immutable.Seq[A]

    Remove all elements from this collection and return the elements in reverse while emptying this data structure

    Remove all elements from this collection and return the elements in reverse while emptying this data structure

    Definition Classes
    ArrayDeque
  180. def removeFirst(p: (A) => Boolean, from: Int = 0): Option[A]

    Returns the first element which satisfies the given predicate after or at some start index and removes this element from the collections

    Returns the first element which satisfies the given predicate after or at some start index and removes this element from the collections

    p

    the predicate used for choosing the first element

    from

    the start index

    returns

    the first element of the queue for which p yields true

    Definition Classes
    ArrayDeque
  181. def removeHead(resizeInternalRepr: Boolean = false): A

    Unsafely remove the first element (throws exception when empty) See also removeHeadOption()

    Unsafely remove the first element (throws exception when empty) See also removeHeadOption()

    resizeInternalRepr

    If this is set, resize the internal representation to reclaim space once in a while

    Definition Classes
    ArrayDeque
    Exceptions thrown

    NoSuchElementException when empty

  182. def removeHeadOption(resizeInternalRepr: Boolean = false): Option[A]

    resizeInternalRepr

    If this is set, resize the internal representation to reclaim space once in a while

    Definition Classes
    ArrayDeque
  183. def removeHeadWhile(f: (A) => Boolean): immutable.Seq[A]

    Returns and removes all elements from the left of this queue which satisfy the given predicate

    Returns and removes all elements from the left of this queue which satisfy the given predicate

    f

    the predicate used for choosing elements

    Definition Classes
    ArrayDeque
  184. def removeLast(resizeInternalRepr: Boolean = false): A

    Unsafely remove the last element (throws exception when empty) See also removeLastOption()

    Unsafely remove the last element (throws exception when empty) See also removeLastOption()

    resizeInternalRepr

    If this is set, resize the internal representation to reclaim space once in a while

    Definition Classes
    ArrayDeque
    Exceptions thrown

    NoSuchElementException when empty

  185. def removeLastOption(resizeInternalRepr: Boolean = false): Option[A]

    resizeInternalRepr

    If this is set, resize the internal representation to reclaim space once in a while

    Definition Classes
    ArrayDeque
  186. def removeLastWhile(f: (A) => Boolean): immutable.Seq[A]

    Returns and removes all elements from the right of this queue which satisfy the given predicate

    Returns and removes all elements from the right of this queue which satisfy the given predicate

    f

    the predicate used for choosing elements

    Definition Classes
    ArrayDeque
  187. final def requireBounds(idx: Int, until: Int = length): Unit
    Attributes
    protected
    Definition Classes
    ArrayDequeOps
    Annotations
    @inline()
  188. def reverse: Stack[A]

    Returns new stack with elements in reversed order.

    Returns new stack with elements in reversed order.

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    returns

    A new stack with all elements of this stack in reversed order.

    Definition Classes
    ArrayDequeOpsSeqOps
  189. def reverseIterator: Iterator[A]

    An iterator yielding elements in reversed order.

    An iterator yielding elements in reversed order.

    Note: xs.reverseIterator is the same as xs.reverse.iterator but might be more efficient.

    returns

    an iterator yielding the elements of this stack in reversed order

    Definition Classes
    IndexedSeqOpsSeqOps
  190. def reversed: collection.Iterable[A]
    Attributes
    protected
    Definition Classes
    IndexedSeqOpsIterableOnceOps
  191. def runWith[U](action: (A) => U): (Int) => Boolean

    Composes this partial function with an action function which gets applied to results of this partial function.

    Composes this partial function with an action function which gets applied to results of this partial function. The action function is invoked only for its side effects; its result is ignored.

    Note that expression pf.runWith(action)(x) is equivalent to

    if(pf isDefinedAt x) { action(pf(x)); true } else false

    except that runWith is implemented via applyOrElse and thus potentially more efficient. Using runWith avoids double evaluation of pattern matchers and guards for partial function literals.

    action

    the action function

    returns

    a function which maps arguments x to isDefinedAt(x). The resulting function runs action(this(x)) where this is defined.

    Definition Classes
    PartialFunction
    See also

    applyOrElse.

  192. def sameElements[B >: A](that: IterableOnce[B]): Boolean

    Are the elements of this collection the same (and in the same order) as those of that?

    Are the elements of this collection the same (and in the same order) as those of that?

    Definition Classes
    SeqOps
  193. def scan[B >: A](z: B)(op: (B, B) => B): Stack[B]

    Computes a prefix scan of the elements of the collection.

    Computes a prefix scan of the elements of the collection.

    Note: The neutral element z may be applied more than once.

    B

    element type of the resulting collection

    z

    neutral element for the operator op

    op

    the associative operator for the scan

    returns

    a new stack containing the prefix scan of the elements in this stack

    Definition Classes
    IterableOps
  194. def scanLeft[B](z: B)(op: (B, A) => B): Stack[B]

    Produces a stack containing cumulative results of applying the operator going left to right, including the initial value.

    Produces a stack containing cumulative results of applying the operator going left to right, including the initial value.

    B

    the type of the elements in the resulting collection

    z

    the initial value

    op

    the binary operator applied to the intermediate result and the element

    returns

    collection with intermediate results

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
  195. def scanRight[B](z: B)(op: (A, B) => B): Stack[B]

    Produces a collection containing cumulative results of applying the operator going right to left.

    Produces a collection containing cumulative results of applying the operator going right to left. The head of the collection is the last cumulative result.

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    Example:

    List(1, 2, 3, 4).scanRight(0)(_ + _) == List(10, 9, 7, 4, 0)
    B

    the type of the elements in the resulting collection

    z

    the initial value

    op

    the binary operator applied to the intermediate result and the element

    returns

    collection with intermediate results

    Definition Classes
    IterableOps
  196. def search[B >: A](elem: B, from: Int, to: Int)(implicit ord: math.Ordering[B]): SearchResult

    Search within an interval in this sorted sequence for a specific element.

    Search within an interval in this sorted sequence for a specific element. If this sequence is an IndexedSeq, a binary search is used. Otherwise, a linear search is used.

    The sequence should be sorted with the same Ordering before calling; otherwise, the results are undefined.

    elem

    the element to find.

    from

    the index where the search starts.

    to

    the index following where the search ends.

    ord

    the ordering to be used to compare elements.

    returns

    a Found value containing the index corresponding to the element in the sequence, or the InsertionPoint where the element would be inserted if the element is not in the sequence.

    Definition Classes
    IndexedSeqOpsSeqOps
    Note

    if to <= from, the search space is empty, and an InsertionPoint at from is returned

    See also

    scala.collection.IndexedSeq

    scala.math.Ordering

    scala.collection.SeqOps, method sorted

  197. def search[B >: A](elem: B)(implicit ord: math.Ordering[B]): SearchResult

    Search this sorted sequence for a specific element.

    Search this sorted sequence for a specific element. If the sequence is an IndexedSeq, a binary search is used. Otherwise, a linear search is used.

    The sequence should be sorted with the same Ordering before calling; otherwise, the results are undefined.

    elem

    the element to find.

    ord

    the ordering to be used to compare elements.

    returns

    a Found value containing the index corresponding to the element in the sequence, or the InsertionPoint where the element would be inserted if the element is not in the sequence.

    Definition Classes
    IndexedSeqOpsSeqOps
    See also

    scala.collection.IndexedSeq

    scala.math.Ordering

    scala.collection.SeqOps, method sorted

  198. def segmentLength(p: (A) => Boolean, from: Int): Int

    Computes the length of the longest segment that starts from some index and whose elements all satisfy some predicate.

    Computes the length of the longest segment that starts from some index and whose elements all satisfy some predicate.

    p

    the predicate used to test elements.

    from

    the index where the search starts.

    returns

    the length of the longest segment of this stack starting from index from such that every element of the segment satisfies the predicate p.

    Definition Classes
    SeqOps
  199. final def segmentLength(p: (A) => Boolean): Int

    Computes the length of the longest segment that starts from the first element and whose elements all satisfy some predicate.

    Computes the length of the longest segment that starts from the first element and whose elements all satisfy some predicate.

    p

    the predicate used to test elements.

    returns

    the length of the longest segment of this stack that starts from the first element such that every element of the segment satisfies the predicate p.

    Definition Classes
    SeqOps
  200. final def size: Int

    The size of this stack.

    The size of this stack.

    returns

    the number of elements in this stack.

    Definition Classes
    SeqOpsIterableOnceOps
  201. final def sizeCompare(that: collection.Iterable[_]): Int

    Compares the size of this stack to the size of another Iterable.

    Compares the size of this stack to the size of another Iterable.

    that

    the Iterable whose size is compared with this stack's size.

    returns

    A value x where

    x <  0       if this.size <  that.size
    x == 0       if this.size == that.size
    x >  0       if this.size >  that.size

    The method as implemented here does not call size directly; its running time is O(this.size min that.size) instead of O(this.size + that.size). The method should be overridden if computing size is cheap and knownSize returns -1.

    Definition Classes
    SeqOpsIterableOps
  202. final def sizeCompare(otherSize: Int): Int

    Compares the size of this stack to a test value.

    Compares the size of this stack to a test value.

    otherSize

    the test value that gets compared with the size.

    returns

    A value x where

    x <  0       if this.size <  otherSize
    x == 0       if this.size == otherSize
    x >  0       if this.size >  otherSize

    The method as implemented here does not call size directly; its running time is O(size min otherSize) instead of O(size). The method should be overridden if computing size is cheap and knownSize returns -1.

    Definition Classes
    SeqOpsIterableOps
    See also

    sizeIs

  203. final def sizeIs: SizeCompareOps

    Returns a value class containing operations for comparing the size of this stack to a test value.

    Returns a value class containing operations for comparing the size of this stack to a test value.

    These operations are implemented in terms of sizeCompare(Int), and allow the following more readable usages:

    this.sizeIs < size     // this.sizeCompare(size) < 0
    this.sizeIs <= size    // this.sizeCompare(size) <= 0
    this.sizeIs == size    // this.sizeCompare(size) == 0
    this.sizeIs != size    // this.sizeCompare(size) != 0
    this.sizeIs >= size    // this.sizeCompare(size) >= 0
    this.sizeIs > size     // this.sizeCompare(size) > 0
    Definition Classes
    IterableOps
    Annotations
    @inline()
  204. def slice(from: Int, until: Int): Stack[A]

    Selects an interval of elements.

    Selects an interval of elements. The returned stack is made up of all elements x which satisfy the invariant:

    from <= indexOf(x) < until
    from

    the lowest index to include from this stack.

    until

    the lowest index to EXCLUDE from this stack.

    returns

    a stack containing the elements greater than or equal to index from extending up to (but not including) index until of this stack.

    Definition Classes
    ArrayDequeOpsIterableOpsIterableOnceOps
  205. def sliceInPlace(start: Int, end: Int): Stack.this.type
    Definition Classes
    Buffer
  206. def sliding(window: Int, step: Int): Iterator[Stack[A]]

    Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)

    Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)

    The returned iterator will be empty when called on an empty collection. The last element the iterator produces may be smaller than the window size when the original collection isn't exhausted by the window before it and its last element isn't skipped by the step before it.

    step

    the distance between the first elements of successive groups

    returns

    An iterator producing stacks of size size, except the last element (which may be the only element) will be smaller if there are fewer than size elements remaining to be grouped.

    Definition Classes
    ArrayDequeOpsIterableOps
    Examples:
    1. List(1, 2, 3, 4, 5).sliding(2, 2) = Iterator(List(1, 2), List(3, 4), List(5))

    2. ,
    3. List(1, 2, 3, 4, 5, 6).sliding(2, 3) = Iterator(List(1, 2), List(4, 5))

    See also

    scala.collection.Iterator, method sliding

  207. def sliding(size: Int): Iterator[Stack[A]]

    Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)

    Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)

    An empty collection returns an empty iterator, and a non-empty collection containing fewer elements than the window size returns an iterator that will produce the original collection as its only element.

    size

    the number of elements per group

    returns

    An iterator producing stacks of size size, except for a non-empty collection with less than size elements, which returns an iterator that produces the source collection itself as its only element.

    Definition Classes
    IterableOps
    Examples:
    1. List().sliding(2) = empty iterator

    2. ,
    3. List(1).sliding(2) = Iterator(List(1))

    4. ,
    5. List(1, 2).sliding(2) = Iterator(List(1, 2))

    6. ,
    7. List(1, 2, 3).sliding(2) = Iterator(List(1, 2), List(2, 3))

    See also

    scala.collection.Iterator, method sliding

  208. def sortBy[B](f: (A) => B)(implicit ord: Ordering[B]): Stack[A]

    Sorts this stack according to the Ordering which results from transforming an implicitly given Ordering with a transformation function.

    Sorts this stack according to the Ordering which results from transforming an implicitly given Ordering with a transformation function.

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    The sort is stable. That is, elements that are equal (as determined by ord.compare) appear in the same order in the sorted sequence as in the original.

    B

    the target type of the transformation f, and the type where the ordering ord is defined.

    f

    the transformation function mapping elements to some other domain B.

    ord

    the ordering assumed on domain B.

    returns

    a stack consisting of the elements of this stack sorted according to the ordering where x < y if ord.lt(f(x), f(y)).

    Definition Classes
    SeqOps
    Example:
    1. val words = "The quick brown fox jumped over the lazy dog".split(' ')
      // this works because scala.Ordering will implicitly provide an Ordering[Tuple2[Int, Char]]
      words.sortBy(x => (x.length, x.head))
      res0: Array[String] = Array(The, dog, fox, the, lazy, over, brown, quick, jumped)
    See also

    scala.math.Ordering

  209. def sortInPlace[B >: A]()(implicit ord: Ordering[B]): Stack.this.type

    Sorts this stack in place according to an Ordering.

    Sorts this stack in place according to an Ordering.

    ord

    the ordering to be used to compare elements.

    returns

    modified input stack sorted according to the ordering ord.

    Definition Classes
    IndexedSeqOps
    See also

    scala.collection.SeqOps.sorted

  210. def sortInPlaceBy[B](f: (A) => B)(implicit ord: Ordering[B]): Stack.this.type

    Sorts this stack in place according to the Ordering which results from transforming an implicitly given Ordering with a transformation function.

    Sorts this stack in place according to the Ordering which results from transforming an implicitly given Ordering with a transformation function.

    Definition Classes
    IndexedSeqOps
    See also

    scala.collection.SeqOps.sortBy

  211. def sortInPlaceWith(lt: (A, A) => Boolean): Stack.this.type

    Sorts this stack in place according to a comparison function.

    Sorts this stack in place according to a comparison function.

    Definition Classes
    IndexedSeqOps
    See also

    scala.collection.SeqOps.sortWith

  212. def sortWith(lt: (A, A) => Boolean): Stack[A]

    Sorts this stack according to a comparison function.

    Sorts this stack according to a comparison function.

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    The sort is stable. That is, elements that are equal (lt returns false for both directions of comparison) appear in the same order in the sorted sequence as in the original.

    lt

    a predicate that is true if its first argument strictly precedes its second argument in the desired ordering.

    returns

    a stack consisting of the elements of this stack sorted according to the comparison function lt.

    Definition Classes
    SeqOps
    Example:
    1. List("Steve", "Bobby", "Tom", "John", "Bob").sortWith((x, y) => x.take(3).compareTo(y.take(3)) < 0) =
      List("Bobby", "Bob", "John", "Steve", "Tom")
  213. def sorted[B >: A](implicit ord: Ordering[B]): Stack[A]

    Sorts this stack according to an Ordering.

    Sorts this stack according to an Ordering.

    The sort is stable. That is, elements that are equal (as determined by ord.compare) appear in the same order in the sorted sequence as in the original.

    ord

    the ordering to be used to compare elements.

    returns

    a stack consisting of the elements of this stack sorted according to the ordering ord.

    Definition Classes
    SeqOps
    See also

    scala.math.Ordering Note: Even when applied to a view or a lazy collection it will always force the elements.

  214. def span(p: (A) => Boolean): (Stack[A], Stack[A])

    Splits this stack into a prefix/suffix pair according to a predicate.

    Splits this stack into a prefix/suffix pair according to a predicate.

    Note: c span p is equivalent to (but possibly more efficient than) (c takeWhile p, c dropWhile p), provided the evaluation of the predicate p does not cause any side-effects.

    p

    the test predicate

    returns

    a pair consisting of the longest prefix of this stack whose elements all satisfy p, and the rest of this stack.

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
  215. def splitAt(n: Int): (Stack[A], Stack[A])

    Splits this stack into a prefix/suffix pair at a given position.

    Splits this stack into a prefix/suffix pair at a given position.

    Note: c splitAt n is equivalent to (but possibly more efficient than) (c take n, c drop n).

    n

    the position at which to split.

    returns

    a pair of stacks consisting of the first n elements of this stack, and the other elements.

    Definition Classes
    IterableOpsIterableOnceOps
  216. def start_+(idx: Int): Int
    Attributes
    protected
    Definition Classes
    ArrayDequeArrayDequeOps
    Annotations
    @inline()
  217. def startsWith[B >: A](that: IterableOnce[B], offset: Int = 0): Boolean

    Tests whether this stack contains the given sequence at a given index.

    Tests whether this stack contains the given sequence at a given index.

    Note: If the both the receiver object this and the argument that are infinite sequences this method may not terminate.

    that

    the sequence to test

    offset

    the index where the sequence is searched.

    returns

    true if the sequence that is contained in this stack at index offset, otherwise false.

    Definition Classes
    SeqOps
  218. def stepper[S <: Stepper[_]](implicit shape: StepperShape[A, S]): S with EfficientSplit

    Returns a scala.collection.Stepper for the elements of this collection.

    Returns a scala.collection.Stepper for the elements of this collection.

    The Stepper enables creating a Java stream to operate on the collection, see scala.jdk.StreamConverters. For collections holding primitive values, the Stepper can be used as an iterator which doesn't box the elements.

    The implicit scala.collection.StepperShape parameter defines the resulting Stepper type according to the element type of this collection.

    Note that this method is overridden in subclasses and the return type is refined to S with EfficientSplit, for example scala.collection.IndexedSeqOps.stepper. For Steppers marked with scala.collection.Stepper.EfficientSplit, the converters in scala.jdk.StreamConverters allow creating parallel streams, whereas bare Steppers can be converted only to sequential streams.

    Definition Classes
    ArrayDequeIndexedSeqOpsIterableOnce
  219. final def strictOptimizedCollect[B, C2](b: Builder[B, C2], pf: PartialFunction[A, B]): C2

    B

    Type of elements of the resulting collection (e.g. String)

    C2

    Type of the resulting collection (e.g. List[String])

    b

    Builder to use to build the resulting collection

    pf

    Element transformation partial function

    returns

    The resulting collection

    Attributes
    protected[this]
    Definition Classes
    StrictOptimizedIterableOps
    Annotations
    @inline()
  220. final def strictOptimizedConcat[B >: A, C2](that: IterableOnce[B], b: Builder[B, C2]): C2

    B

    Type of elements of the resulting collections (e.g. Int)

    C2

    Type of the resulting collection (e.g. List[Int])

    that

    Elements to concatenate to this collection

    b

    Builder to use to build the resulting collection

    returns

    The resulting collection

    Attributes
    protected[this]
    Definition Classes
    StrictOptimizedIterableOps
    Annotations
    @inline()
  221. final def strictOptimizedFlatMap[B, C2](b: Builder[B, C2], f: (A) => IterableOnce[B]): C2

    B

    Type of elements of the resulting collection (e.g. String)

    C2

    Type of the resulting collection (e.g. List[String])

    b

    Builder to use to build the resulting collection

    f

    Element transformation function

    returns

    The resulting collection

    Attributes
    protected[this]
    Definition Classes
    StrictOptimizedIterableOps
    Annotations
    @inline()
  222. final def strictOptimizedFlatten[B, C2](b: Builder[B, C2])(implicit toIterableOnce: (A) => IterableOnce[B]): C2

    B

    Type of elements of the resulting collection (e.g. Int)

    C2

    Type of the resulting collection (e.g. List[Int])

    b

    Builder to use to build the resulting collection

    toIterableOnce

    Evidence that A can be seen as an IterableOnce[B]

    returns

    The resulting collection

    Attributes
    protected[this]
    Definition Classes
    StrictOptimizedIterableOps
    Annotations
    @inline()
  223. final def strictOptimizedMap[B, C2](b: Builder[B, C2], f: (A) => B): C2

    B

    Type of elements of the resulting collection (e.g. String)

    C2

    Type of the resulting collection (e.g. List[String])

    b

    Builder to use to build the resulting collection

    f

    Element transformation function

    returns

    The resulting collection

    Attributes
    protected[this]
    Definition Classes
    StrictOptimizedIterableOps
    Annotations
    @inline()
  224. final def strictOptimizedZip[B, C2](that: IterableOnce[B], b: Builder[(A, B), C2]): C2

    B

    Type of elements of the second collection (e.g. String)

    C2

    Type of the resulting collection (e.g. List[(Int, String)])

    that

    Collection to zip with this collection

    b

    Builder to use to build the resulting collection

    returns

    The resulting collection

    Attributes
    protected[this]
    Definition Classes
    StrictOptimizedIterableOps
    Annotations
    @inline()
  225. def stringPrefix: String
    Attributes
    protected[this]
    Definition Classes
    StackArrayDequeIndexedSeqBufferSeqIterable
    Annotations
    @nowarn()
  226. def subtractAll(xs: IterableOnce[A]): Stack.this.type

    Removes all elements produced by an iterator from this stack.

    Removes all elements produced by an iterator from this stack.

    xs

    the iterator producing the elements to remove.

    returns

    the stack itself

    Definition Classes
    Shrinkable
  227. def subtractOne(elem: A): Stack.this.type

    Removes a single element from this buffer, at its first occurrence.

    Removes a single element from this buffer, at its first occurrence. If the buffer does not contain that element, it is unchanged.

    returns

    the buffer itself

    Definition Classes
    ArrayDequeBufferShrinkable
  228. def sum[B >: A](implicit num: math.Numeric[B]): B

    Sums the elements of this collection.

    Sums the elements of this collection.

    The default implementation uses reduce for a known non-empty collection, foldLeft otherwise.

    B

    the result type of the + operator.

    num

    an implicit parameter defining a set of numeric operations which includes the + operator to be used in forming the sum.

    returns

    the sum of all elements of this stack with respect to the + operator in num.

    Definition Classes
    IterableOnceOps
  229. final def synchronized[T0](arg0: => T0): T0

    Executes the code in body with an exclusive lock on this.

    Executes the code in body with an exclusive lock on this.

    returns

    the result of body

    Definition Classes
    AnyRef
  230. def tail: Stack[A]

    The rest of the collection without its first element.

    The rest of the collection without its first element.

    Definition Classes
    IterableOps
  231. def tails: Iterator[Stack[A]]

    Iterates over the tails of this stack.

    Iterates over the tails of this stack. The first value will be this stack and the final one will be an empty stack, with the intervening values the results of successive applications of tail.

    returns

    an iterator over all the tails of this stack

    Definition Classes
    IterableOps
    Example:
    1. List(1,2,3).tails = Iterator(List(1,2,3), List(2,3), List(3), Nil)

  232. def take(n: Int): Stack[A]

    Selects the first n elements.

    Selects the first n elements.

    n

    the number of elements to take from this stack.

    returns

    a stack consisting only of the first n elements of this stack, or else the whole stack, if it has less than n elements. If n is negative, returns an empty stack.

    Definition Classes
    IndexedSeqOpsIterableOpsIterableOnceOps
  233. def takeInPlace(n: Int): Stack.this.type
    Definition Classes
    Buffer
  234. def takeRight(n: Int): Stack[A]

    A collection containing the last n elements of this collection.

    A collection containing the last n elements of this collection.

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    n

    the number of elements to take from this stack.

    returns

    a stack consisting only of the last n elements of this stack, or else the whole stack, if it has less than n elements. If n is negative, returns an empty stack.

    Definition Classes
    StrictOptimizedIterableOpsIterableOps
  235. def takeRightInPlace(n: Int): Stack.this.type
    Definition Classes
    Buffer
  236. def takeWhile(p: (A) => Boolean): Stack[A]

    Takes longest prefix of elements that satisfy a predicate.

    Takes longest prefix of elements that satisfy a predicate.

    p

    The predicate used to test elements.

    returns

    the longest prefix of this stack whose elements all satisfy the predicate p.

    Definition Classes
    IterableOpsIterableOnceOps
  237. def takeWhileInPlace(p: (A) => Boolean): Stack.this.type
    Definition Classes
    Buffer
  238. def tapEach[U](f: (A) => U): Stack[A]

    Applies a side-effecting function to each element in this collection.

    Applies a side-effecting function to each element in this collection. Strict collections will apply f to their elements immediately, while lazy collections like Views and LazyLists will only apply f on each element if and when that element is evaluated, and each time that element is evaluated.

    U

    the return type of f

    f

    a function to apply to each element in this stack

    returns

    The same logical collection as this

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
  239. def to[C1](factory: Factory[A, C1]): C1

    Given a collection factory factory, convert this collection to the appropriate representation for the current element type A.

    Given a collection factory factory, convert this collection to the appropriate representation for the current element type A. Example uses:

    xs.to(List)
    xs.to(ArrayBuffer)
    xs.to(BitSet) // for xs: Iterable[Int]
    Definition Classes
    IterableOnceOps
  240. def toArray[B >: A](implicit arg0: ClassTag[B]): Array[B]

    Convert collection to array.

    Convert collection to array.

    Implementation note: DO NOT call Array.from from this method.

    Definition Classes
    ArrayDequeIterableOnceOps
  241. final def toBuffer[B >: A]: Buffer[B]
    Definition Classes
    IterableOnceOps
    Annotations
    @inline()
  242. def toIndexedSeq: immutable.IndexedSeq[A]
    Definition Classes
    IterableOnceOps
  243. def toList: immutable.List[A]
    Definition Classes
    IterableOnceOps
  244. def toMap[K, V](implicit ev: <:<[A, (K, V)]): immutable.Map[K, V]
    Definition Classes
    IterableOnceOps
  245. def toSeq: immutable.Seq[A]

    returns

    This collection as a Seq[A]. This is equivalent to to(Seq) but might be faster.

    Definition Classes
    IterableOnceOps
  246. def toSet[B >: A]: immutable.Set[B]
    Definition Classes
    IterableOnceOps
  247. def toString(): String

    Creates a String representation of this object.

    Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.

    returns

    a String representation of the object.

    Definition Classes
    SeqFunction1Iterable → AnyRef → Any
  248. def toVector: immutable.Vector[A]
    Definition Classes
    IterableOnceOps
  249. final def top: A

    Returns the top element of the stack.

    Returns the top element of the stack. This method will not remove the element from the stack. An error is signaled if there is no element on the stack.

    returns

    the top element

    Annotations
    @inline()
    Exceptions thrown
  250. def transpose[B](implicit asIterable: (A) => collection.Iterable[B]): Stack[Stack[B]]

    Transposes this stack of iterable collections into a stack of stacks.

    Transposes this stack of iterable collections into a stack of stacks.

    The resulting collection's type will be guided by the static type of stack. For example:

    val xs = List(
               Set(1, 2, 3),
               Set(4, 5, 6)).transpose
    // xs == List(
    //         List(1, 4),
    //         List(2, 5),
    //         List(3, 6))
    
    val ys = Vector(
               List(1, 2, 3),
               List(4, 5, 6)).transpose
    // ys == Vector(
    //         Vector(1, 4),
    //         Vector(2, 5),
    //         Vector(3, 6))

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    B

    the type of the elements of each iterable collection.

    asIterable

    an implicit conversion which asserts that the element type of this stack is an Iterable.

    returns

    a two-dimensional stack of stacks which has as nth row the nth column of this stack.

    Definition Classes
    IterableOps
    Exceptions thrown

    IllegalArgumentException if all collections in this stack are not of the same size.

  251. def trimToSize(): Unit

    Trims the capacity of this ArrayDeque's instance to be the current size

    Trims the capacity of this ArrayDeque's instance to be the current size

    Definition Classes
    ArrayDeque
  252. def unapply(a: Int): Option[A]

    Tries to extract a B from an A in a pattern matching expression.

    Tries to extract a B from an A in a pattern matching expression.

    Definition Classes
    PartialFunction
  253. def unlift: PartialFunction[Int, B]

    Converts an optional function to a partial function.

    Converts an optional function to a partial function.

    Implicit
    This member is added by an implicit conversion from Stack[A] toUnliftOps[Int, B] performed by method UnliftOps in scala.Function1.This conversion will take place only if A is a subclass of Option[B] (A <: Option[B]).
    Definition Classes
    UnliftOps
    Example:
    1. Unlike Function.unlift, this UnliftOps.unlift method can be used in extractors.

      val of: Int => Option[String] = { i =>
        if (i == 2) {
          Some("matched by an optional function")
        } else {
          None
        }
      }
      
      util.Random.nextInt(4) match {
        case of.unlift(m) => // Convert an optional function to a pattern
          println(m)
        case _ =>
          println("Not matched")
      }
  254. def unzip[A1, A2](implicit asPair: (A) => (A1, A2)): (Stack[A1], Stack[A2])

    Converts this stack of pairs into two collections of the first and second half of each pair.

    Converts this stack of pairs into two collections of the first and second half of each pair.

    val xs = `Stack`(
               (1, "one"),
               (2, "two"),
               (3, "three")).unzip
    // xs == (`Stack`(1, 2, 3),
    //        `Stack`(one, two, three))
    A1

    the type of the first half of the element pairs

    A2

    the type of the second half of the element pairs

    asPair

    an implicit conversion which asserts that the element type of this stack is a pair.

    returns

    a pair of stacks, containing the first, respectively second half of each element pair of this stack.

    Definition Classes
    StrictOptimizedIterableOpsIterableOps
  255. def unzip3[A1, A2, A3](implicit asTriple: (A) => (A1, A2, A3)): (Stack[A1], Stack[A2], Stack[A3])

    Converts this stack of triples into three collections of the first, second, and third element of each triple.

    Converts this stack of triples into three collections of the first, second, and third element of each triple.

    val xs = `Stack`(
               (1, "one", '1'),
               (2, "two", '2'),
               (3, "three", '3')).unzip3
    // xs == (`Stack`(1, 2, 3),
    //        `Stack`(one, two, three),
    //        `Stack`(1, 2, 3))
    A1

    the type of the first member of the element triples

    A2

    the type of the second member of the element triples

    A3

    the type of the third member of the element triples

    asTriple

    an implicit conversion which asserts that the element type of this stack is a triple.

    returns

    a triple of stacks, containing the first, second, respectively third member of each element triple of this stack.

    Definition Classes
    StrictOptimizedIterableOpsIterableOps
  256. def update(idx: Int, elem: A): Unit

    Replaces element at given index with a new value.

    Replaces element at given index with a new value.

    idx

    the index of the element to replace.

    elem

    the new value.

    Definition Classes
    ArrayDequeSeqOps
    Exceptions thrown

    IndexOutOfBoundsException if the index is not valid.

  257. def updated[B >: A](index: Int, elem: B): Stack[B]

    A copy of this stack with one single replaced element.

    A copy of this stack with one single replaced element.

    B

    the element type of the returned stack.

    index

    the position of the replacement

    elem

    the replacing element

    returns

    a new stack which is a copy of this stack with the element at position index replaced by elem.

    Definition Classes
    SeqOps
    Exceptions thrown

    IndexOutOfBoundsException if index does not satisfy 0 <= index < length. In case of a lazy collection this exception may be thrown at a later time or not at all (if the end of the collection is never evaluated).

  258. def view: IndexedSeqView[A]

    A view over the elements of this collection.

    A view over the elements of this collection.

    Definition Classes
    IndexedSeqOpsSeqOpsIterableOps
  259. final def wait(): Unit

    See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait--.

    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
    Note

    not specified by SLS as a member of AnyRef

  260. final def wait(arg0: Long, arg1: Int): Unit

    See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-int-

    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
    Note

    not specified by SLS as a member of AnyRef

  261. final def wait(arg0: Long): Unit

    See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-.

    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()
    Note

    not specified by SLS as a member of AnyRef

  262. def withFilter(p: (A) => Boolean): WithFilter[A, [_]Stack[_]]

    Creates a non-strict filter of this stack.

    Creates a non-strict filter of this stack.

    Note: the difference between c filter p and c withFilter p is that the former creates a new collection, whereas the latter only restricts the domain of subsequent map, flatMap, foreach, and withFilter operations.

    p

    the predicate used to test elements.

    returns

    an object of class WithFilter, which supports map, flatMap, foreach, and withFilter operations. All these operations apply to those elements of this stack which satisfy the predicate p.

    Definition Classes
    IterableOps
  263. def writeReplace(): AnyRef
    Attributes
    protected[this]
    Definition Classes
    DefaultSerializable
  264. def zip[B](that: IterableOnce[B]): Stack[(A, B)]

    Returns a stack formed from this stack and another iterable collection by combining corresponding elements in pairs.

    Returns a stack formed from this stack and another iterable collection by combining corresponding elements in pairs. If one of the two collections is longer than the other, its remaining elements are ignored.

    B

    the type of the second half of the returned pairs

    that

    The iterable providing the second half of each result pair

    returns

    a new stack containing pairs consisting of corresponding elements of this stack and that. The length of the returned collection is the minimum of the lengths of this stack and that.

    Definition Classes
    StrictOptimizedIterableOpsIterableOps
  265. def zipAll[A1 >: A, B](that: collection.Iterable[B], thisElem: A1, thatElem: B): Stack[(A1, B)]

    Returns a stack formed from this stack and another iterable collection by combining corresponding elements in pairs.

    Returns a stack formed from this stack and another iterable collection by combining corresponding elements in pairs. If one of the two collections is shorter than the other, placeholder elements are used to extend the shorter collection to the length of the longer.

    that

    the iterable providing the second half of each result pair

    thisElem

    the element to be used to fill up the result if this stack is shorter than that.

    thatElem

    the element to be used to fill up the result if that is shorter than this stack.

    returns

    a new collection of type That containing pairs consisting of corresponding elements of this stack and that. The length of the returned collection is the maximum of the lengths of this stack and that. If this stack is shorter than that, thisElem values are used to pad the result. If that is shorter than this stack, thatElem values are used to pad the result.

    Definition Classes
    IterableOps
  266. def zipWithIndex: Stack[(A, Int)]

    Zips this stack with its indices.

    Zips this stack with its indices.

    returns

    A new stack containing pairs consisting of all elements of this stack paired with their index. Indices start at 0.

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
    Example:
    1. List("a", "b", "c").zipWithIndex == List(("a", 0), ("b", 1), ("c", 2))

Deprecated Value Members

  1. final def +=(elem1: A, elem2: A, elems: A*): Stack.this.type

    Adds two or more elements to this stack.

    Adds two or more elements to this stack.

    elem1

    the first element to add.

    elem2

    the second element to add.

    elems

    the remaining elements to add.

    returns

    the stack itself

    Definition Classes
    Growable
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use ++= aka addAll instead of varargs +=; infix operations with an operand of multiple args will be deprecated

  2. def -=(elem1: A, elem2: A, elems: A*): Stack.this.type

    Removes two or more elements from this stack.

    Removes two or more elements from this stack.

    elem1

    the first element to remove.

    elem2

    the second element to remove.

    elems

    the remaining elements to remove.

    returns

    the stack itself

    Definition Classes
    Shrinkable
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.3) Use --= aka subtractAll instead of varargs -=; infix operations with an operand of multiple args will be deprecated

  3. def /:[B](z: B)(op: (B, A) => B): B
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
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    (stack: IterableOnceExtensionMethods[A])./:(z)(op)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .iterator.foldLeft instead

  4. final def /:[B](z: B)(op: (B, A) => B): B
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use foldLeft instead of /:

  5. def :\[B](z: B)(op: (A, B) => B): B
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
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    (stack: IterableOnceExtensionMethods[A]).:\(z)(op)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .iterator.foldRight instead

  6. final def :\[B](z: B)(op: (A, B) => B): B
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use foldRight instead of :\

  7. def aggregate[B](z: => B)(seqop: (B, A) => B, combop: (B, B) => B): B
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) aggregate is not relevant for sequential collections. Use foldLeft(z)(seqop) instead.

  8. final def append(elems: A*): Stack.this.type
    Definition Classes
    Buffer
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use appendAll instead

  9. def collectFirst[B](f: PartialFunction[A, B]): Option[B]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (stack: IterableOnceExtensionMethods[A]).collectFirst(f)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.collectFirst(...) instead

  10. def companion: IterableFactory[[_]Stack[_]]
    Definition Classes
    IterableOps
    Annotations
    @deprecated @deprecatedOverriding() @inline()
    Deprecated

    (Since version 2.13.0) Use iterableFactory instead

  11. def copyToBuffer(dest: Buffer[A]): Unit
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
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    (stack: IterableOnceExtensionMethods[A]).copyToBuffer(dest)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.copyToBuffer(...) instead

  12. final def copyToBuffer[B >: A](dest: Buffer[B]): Unit
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use dest ++= coll instead

  13. def count(f: (A) => Boolean): Int
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (stack: IterableOnceExtensionMethods[A]).count(f)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.count(...) instead

  14. def exists(f: (A) => Boolean): Boolean
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
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    (stack: IterableOnceExtensionMethods[A]).exists(f)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.exists(...) instead

  15. def filter(f: (A) => Boolean): Iterator[A]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
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    (stack: IterableOnceExtensionMethods[A]).filter(f)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.filter(...) instead

  16. def find(p: (A) => Boolean): Option[A]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (stack: IterableOnceExtensionMethods[A]).find(p)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.find instead

  17. def flatMap[B](f: (A) => IterableOnce[B]): IterableOnce[B]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (stack: IterableOnceExtensionMethods[A]).flatMap(f)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.flatMap instead or consider requiring an Iterable

  18. def fold[A1 >: A](z: A1)(op: (A1, A1) => A1): A1
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (stack: IterableOnceExtensionMethods[A]).fold(z)(op)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.fold instead

  19. def foldLeft[B](z: B)(op: (B, A) => B): B
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (stack: IterableOnceExtensionMethods[A]).foldLeft(z)(op)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .iterator.foldLeft instead

  20. def foldRight[B](z: B)(op: (A, B) => B): B
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (stack: IterableOnceExtensionMethods[A]).foldRight(z)(op)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .iterator.foldRight instead

  21. def forall(f: (A) => Boolean): Boolean
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
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    (stack: IterableOnceExtensionMethods[A]).forall(f)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.forall(...) instead

  22. def foreach[U](f: (A) => U): Unit
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (stack: IterableOnceExtensionMethods[A]).foreach(f)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .iterator.foreach(...) instead

  23. def formatted(fmtstr: String): String

    Returns string formatted according to given format string.

    Returns string formatted according to given format string. Format strings are as for String.format (@see java.lang.String.format).

    Implicit
    This member is added by an implicit conversion from Stack[A] toStringFormat[Stack[A]] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.12.16) Use formatString.format(value) instead of value.formatted(formatString), or use the f"" string interpolator. In Java 15 and later, formatted resolves to the new method in String which has reversed parameters.

  24. def hasDefiniteSize: Boolean

    Tests whether this stack is known to have a finite size.

    Tests whether this stack is known to have a finite size. All strict collections are known to have finite size. For a non-strict collection such as Stream, the predicate returns true if all elements have been computed. It returns false if the stream is not yet evaluated to the end. Non-empty Iterators usually return false even if they were created from a collection with a known finite size.

    Note: many collection methods will not work on collections of infinite sizes. The typical failure mode is an infinite loop. These methods always attempt a traversal without checking first that hasDefiniteSize returns true. However, checking hasDefiniteSize can provide an assurance that size is well-defined and non-termination is not a concern.

    returns

    true if this collection is known to have finite size, false otherwise.

    Definition Classes
    IterableOnceOps
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Check .knownSize instead of .hasDefiniteSize for more actionable information (see scaladoc for details)

    See also

    method knownSize for a more useful alternative

  25. def isEmpty: Boolean
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
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    (stack: IterableOnceExtensionMethods[A]).isEmpty
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.isEmpty instead

  26. def map[B](f: (A) => B): IterableOnce[B]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (stack: IterableOnceExtensionMethods[A]).map(f)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.map instead or consider requiring an Iterable

  27. def max(implicit ord: math.Ordering[A]): A
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    This implicitly inherited member is shadowed by one or more members in this class.
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    (stack: IterableOnceExtensionMethods[A]).max(ord)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.max instead

  28. def maxBy[B](f: (A) => B)(implicit cmp: math.Ordering[B]): A
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    This implicitly inherited member is shadowed by one or more members in this class.
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    (stack: IterableOnceExtensionMethods[A]).maxBy(f)(cmp)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.maxBy(...) instead

  29. def min(implicit ord: math.Ordering[A]): A
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    This implicitly inherited member is shadowed by one or more members in this class.
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    (stack: IterableOnceExtensionMethods[A]).min(ord)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.min instead

  30. def minBy[B](f: (A) => B)(implicit cmp: math.Ordering[B]): A
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    This implicitly inherited member is shadowed by one or more members in this class.
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    (stack: IterableOnceExtensionMethods[A]).minBy(f)(cmp)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.minBy(...) instead

  31. def mkString: String
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
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    Definition Classes
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    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.mkString instead

  32. def mkString(sep: String): String
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (stack: IterableOnceExtensionMethods[A]).mkString(sep)
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  33. def mkString(start: String, sep: String, end: String): String
    Implicit
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  34. def nonEmpty: Boolean
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (Since version 2.13.0) Use .iterator.nonEmpty instead

  35. final def prefixLength(p: (A) => Boolean): Int

    Returns the length of the longest prefix whose elements all satisfy some predicate.

    Returns the length of the longest prefix whose elements all satisfy some predicate.

    p

    the predicate used to test elements.

    returns

    the length of the longest prefix of this stack such that every element of the segment satisfies the predicate p.

    Definition Classes
    SeqOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use segmentLength instead of prefixLength

  36. final def prepend(elems: A*): Stack.this.type
    Definition Classes
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    (Since version 2.13.0) Use prependAll instead

  37. def product(implicit num: math.Numeric[A]): A
    Implicit
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  38. def reduce(f: (A, A) => A): A
    Implicit
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  39. def reduceLeft(f: (A, A) => A): A
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    (Since version 2.13.0) Use .iterator.reduceLeft(...) instead

  40. def reduceLeftOption(f: (A, A) => A): Option[A]
    Implicit
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    (Since version 2.13.0) Use .iterator.reduceLeftOption(...) instead

  41. def reduceOption(f: (A, A) => A): Option[A]
    Implicit
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  42. def reduceRight(f: (A, A) => A): A
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    (Since version 2.13.0) Use .iterator.reduceRight(...) instead

  43. def reduceRightOption(f: (A, A) => A): Option[A]
    Implicit
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    (Since version 2.13.0) Use .iterator.reduceRightOption(...) instead

  44. final def repr: Stack[A]
    Definition Classes
    IterableOps
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use coll instead of repr in a collection implementation, use the collection value itself from the outside

  45. def reverseMap[B](f: (A) => B): Stack[B]
    Definition Classes
    SeqOps
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .reverseIterator.map(f).to(...) instead of .reverseMap(f)

  46. def sameElements[B >: A](that: IterableOnce[B]): Boolean
    Implicit
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    (Since version 2.13.0) Use .iterator.sameElements instead

  47. def seq: Stack.this.type
    Definition Classes
    Iterable
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Iterable.seq always returns the iterable itself

  48. def size: Int
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (Since version 2.13.0) Use .iterator.size instead

  49. def sum(implicit num: math.Numeric[A]): A
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (stack: IterableOnceExtensionMethods[A]).sum(num)
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    (Since version 2.13.0) Use .iterator.sum instead

  50. def to[C1](factory: Factory[A, C1]): C1
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (Since version 2.13.0) Use .iterator.to(factory) instead

  51. def toArray[B >: A](implicit arg0: ClassTag[B]): Array[B]
    Implicit
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    (Since version 2.13.0) Use .iterator.toArray

  52. def toBuffer[B >: A]: Buffer[B]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (stack: IterableOnceExtensionMethods[A]).toBuffer
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    (Since version 2.13.0) Use .iterator.to(ArrayBuffer) instead

  53. def toIndexedSeq: collection.IndexedSeq[A]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    Definition Classes
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    (Since version 2.13.0) Use .iterator.toIndexedSeq instead

  54. final def toIterable: collection.Iterable[A]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    Deprecated

    (Since version 2.13.0) Use .iterator.to(Iterable) instead

  55. final def toIterable: Stack.this.type

    returns

    This collection as an Iterable[A]. No new collection will be built if this is already an Iterable[A].

    Definition Classes
    IterableIterableOps
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.7) toIterable is internal and will be made protected; its name is similar to toList or toSeq, but it doesn't copy non-immutable collections

  56. def toIterator: Iterator[A]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
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    (stack: IterableOnceExtensionMethods[A]).toIterator
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    Deprecated

    (Since version 2.13.0) Use .iterator instead

  57. final def toIterator: Iterator[A]
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .iterator instead of .toIterator

  58. def toList: immutable.List[A]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (stack: IterableOnceExtensionMethods[A]).toList
    Definition Classes
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    Deprecated

    (Since version 2.13.0) Use .iterator.to(List) instead

  59. def toMap[K, V](implicit ev: <:<[A, (K, V)]): immutable.Map[K, V]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (stack: IterableOnceExtensionMethods[A]).toMap(ev)
    Definition Classes
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    Deprecated

    (Since version 2.13.0) Use .iterator.to(Map) instead

  60. def toSeq: immutable.Seq[A]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
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    Definition Classes
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    Deprecated

    (Since version 2.13.0) Use .iterator.to(Seq) instead

  61. def toSet[B >: A]: immutable.Set[B]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    Deprecated

    (Since version 2.13.0) Use .iterator.to(Set) instead

  62. def toStream: immutable.Stream[A]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    Deprecated

    (Since version 2.13.0) Use .iterator.to(LazyList) instead

  63. final def toStream: immutable.Stream[A]
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .to(LazyList) instead of .toStream

  64. final def toTraversable: collection.Traversable[A]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    Deprecated

    (Since version 2.13.0) Use .iterator.to(Iterable) instead

  65. final def toTraversable: collection.Traversable[A]

    Converts this stack to an unspecified Iterable.

    Converts this stack to an unspecified Iterable. Will return the same collection if this instance is already Iterable.

    returns

    An Iterable containing all elements of this stack.

    Definition Classes
    IterableOps
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) toTraversable is internal and will be made protected; its name is similar to toList or toSeq, but it doesn't copy non-immutable collections

  66. def toVector: immutable.Vector[A]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
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    (stack: IterableOnceExtensionMethods[A]).toVector
    Definition Classes
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    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .iterator.to(Vector) instead

  67. final def transform(f: (A) => A): Stack.this.type
    Definition Classes
    SeqOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use mapInPlace on an IndexedSeq instead

  68. def trimEnd(n: Int): Unit

    Removes the last n elements of this buffer.

    Removes the last n elements of this buffer.

    n

    the number of elements to remove from the end of this buffer.

    Definition Classes
    Buffer
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.4) use dropRightInPlace instead

  69. def trimStart(n: Int): Unit

    Removes the first n elements of this buffer.

    Removes the first n elements of this buffer.

    n

    the number of elements to remove from the beginning of this buffer.

    Definition Classes
    Buffer
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.4) use dropInPlace instead

  70. final def union[B >: A](that: collection.Seq[B]): Stack[B]

    Produces a new sequence which contains all elements of this stack and also all elements of a given sequence.

    Produces a new sequence which contains all elements of this stack and also all elements of a given sequence. xs union ys is equivalent to xs ++ ys.

    B

    the element type of the returned stack.

    that

    the sequence to add.

    returns

    a new collection which contains all elements of this stack followed by all elements of that.

    Definition Classes
    SeqOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use concat instead

  71. def view(from: Int, until: Int): IndexedSeqView[A]

    A view over a slice of the elements of this collection.

    A view over a slice of the elements of this collection.

    Definition Classes
    IndexedSeqOpsIterableOps
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .view.slice(from, until) instead of .view(from, until)

  72. def withFilter(f: (A) => Boolean): Iterator[A]
    Implicit
    This member is added by an implicit conversion from Stack[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (stack: IterableOnceExtensionMethods[A]).withFilter(f)
    Definition Classes
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    Annotations
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    Deprecated

    (Since version 2.13.0) Use .iterator.withFilter(...) instead

  73. def [B](y: B): (Stack[A], B)
    Implicit
    This member is added by an implicit conversion from Stack[A] toArrowAssoc[Stack[A]] performed by method ArrowAssoc in scala.Predef.This conversion will take place only if A is a subclass of Option[Nothing] (A <: Option[Nothing]).
    Definition Classes
    ArrowAssoc
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use -> instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.

Inherited from ArrayDeque[A]

Inherited from DefaultSerializable

Inherited from java.io.Serializable

Inherited from ArrayDequeOps[A, [_]Stack[_], Stack[A]]

Inherited from StrictOptimizedSeqOps[A, [_]Stack[_], Stack[A]]

Inherited from StrictOptimizedIterableOps[A, [_]Stack[_], Stack[A]]

Inherited from IndexedBuffer[A]

Inherited from IndexedSeq[A]

Inherited from IndexedSeqOps[A, [_]Stack[_], Stack[A]]

Inherited from collection.IndexedSeq[A]

Inherited from collection.IndexedSeqOps[A, [_]Stack[_], Stack[A]]

Inherited from AbstractBuffer[A]

Inherited from Buffer[A]

Inherited from Shrinkable[A]

Inherited from Growable[A]

Inherited from Clearable

Inherited from AbstractSeq[A]

Inherited from Seq[A]

Inherited from SeqOps[A, [_]Stack[_], Stack[A]]

Inherited from Cloneable[Stack[A]]

Inherited from java.lang.Cloneable

Inherited from Iterable[A]

Inherited from collection.AbstractSeq[A]

Inherited from collection.Seq[A]

Inherited from Equals

Inherited from collection.SeqOps[A, [_]Stack[_], Stack[A]]

Inherited from PartialFunction[Int, A]

Inherited from (Int) => A

Inherited from collection.AbstractIterable[A]

Inherited from collection.Iterable[A]

Inherited from IterableFactoryDefaults[A, [x]Stack[x]]

Inherited from IterableOps[A, [_]Stack[_], Stack[A]]

Inherited from IterableOnceOps[A, [_]Stack[_], Stack[A]]

Inherited from IterableOnce[A]

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion UnliftOps fromStack[A] to UnliftOps[Int, B]

Inherited by implicit conversion iterableOnceExtensionMethods fromStack[A] to IterableOnceExtensionMethods[A]

Inherited by implicit conversion any2stringadd fromStack[A] to any2stringadd[Stack[A]]

Inherited by implicit conversion StringFormat fromStack[A] to StringFormat[Stack[A]]

Inherited by implicit conversion Ensuring fromStack[A] to Ensuring[Stack[A]]

Inherited by implicit conversion ArrowAssoc fromStack[A] to ArrowAssoc[Stack[A]]

Ungrouped