Packages

sealed class PriorityQueue[A] extends AbstractIterable[A] with Iterable[A] with IterableOps[A, Iterable, PriorityQueue[A]] with StrictOptimizedIterableOps[A, Iterable, PriorityQueue[A]] with Builder[A, PriorityQueue[A]] with Cloneable[PriorityQueue[A]] with Growable[A] with Serializable

A heap-based priority queue.

To prioritize elements of type A there must be an implicit Ordering[A] available at creation. Elements are retrieved in priority order by using dequeue or dequeueAll.

If multiple elements have the same priority as determined by the ordering for this PriorityQueue, no guarantees are made regarding the order in which those elements are returned by dequeue or dequeueAll. In particular, that means this class does not guarantee first-in-first-out behavior, as may be incorrectly inferred from the fact that this data structure is called a "queue".

Only the dequeue and dequeueAll methods will return elements in priority order (while removing elements from the heap). Standard collection methods such as drop, iterator, toList and toString use an arbitrary iteration order: they will traverse the heap or remove elements in whichever order seems most convenient.

Therefore, printing a PriorityQueue will not show elements in priority order, though the highest-priority element will be printed first. To print the elements in order, it's necessary to dequeue them. To do this non-destructively, duplicate the PriorityQueue first; the clone method is a suitable way to obtain a disposable copy.

Client keys are assumed to be immutable. Mutating keys may violate the invariant of the underlying heap-ordered tree. Note that clone does not rebuild the underlying tree.

scala> val pq = collection.mutable.PriorityQueue(1, 2, 5, 3, 7)
val pq: scala.collection.mutable.PriorityQueue[Int] = PriorityQueue(7, 3, 5, 1, 2)

scala> pq.toList              // also not in order
val res0: List[Int] = List(7, 3, 5, 1, 2)

scala> pq.clone.dequeueAll
val res1: Seq[Int] = ArraySeq(7, 5, 3, 2, 1)
A

type of the elements in this priority queue.

Source
PriorityQueue.scala
Type Hierarchy
Ordering
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Inherited
  1. PriorityQueue
  2. Serializable
  3. Cloneable
  4. Cloneable
  5. Builder
  6. Growable
  7. Clearable
  8. StrictOptimizedIterableOps
  9. AbstractIterable
  10. Iterable
  11. AbstractIterable
  12. Iterable
  13. IterableFactoryDefaults
  14. IterableOps
  15. IterableOnceOps
  16. IterableOnce
  17. AnyRef
  18. Any
Implicitly
  1. by iterableOnceExtensionMethods
  2. by any2stringadd
  3. by StringFormat
  4. by Ensuring
  5. by ArrowAssoc
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new PriorityQueue()(implicit ord: math.Ordering[A])

    ord

    implicit ordering used to compare the elements of type A.

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 PriorityQueue[A] toany2stringadd[PriorityQueue[A]] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ++(xs: IterableOnce[A]): PriorityQueue[A]

    Adds all elements provided by a IterableOnce object into the priority queue.

    Adds all elements provided by a IterableOnce object into the priority queue.

    xs

    a iterable object.

    returns

    a new priority queue containing elements of both xs and this.

  5. final def ++[B >: A](suffix: IterableOnce[B]): Iterable[B]

    Alias for concat

    Alias for concat

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

    Alias for addAll

    Alias for addAll

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

    Alias for addOne

    Alias for addOne

    Definition Classes
    Growable
    Annotations
    @inline()
  8. def ->[B](y: B): (PriorityQueue[A], B)
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toArrowAssoc[PriorityQueue[A]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  9. 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
  10. def addAll(xs: IterableOnce[A]): PriorityQueue.this.type

    Adds all elements produced by an IterableOnce to this priority queue.

    Adds all elements produced by an IterableOnce to this priority queue.

    xs

    the IterableOnce producing the elements to add.

    returns

    the priority queue itself.

    Definition Classes
    PriorityQueueGrowable
  11. def addOne(elem: A): PriorityQueue.this.type

    Inserts a single element into the priority queue.

    Inserts a single element into the priority queue.

    elem

    the element to insert.

    returns

    this priority queue.

    Definition Classes
    PriorityQueueGrowable
  12. final def addString(b: StringBuilder): b.type

    Appends all elements of this priority queue to a string builder.

    Appends all elements of this priority queue to a string builder. The written text consists of the string representations (w.r.t. the method toString) of all elements of this priority queue 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()
  13. final def addString(b: StringBuilder, sep: String): b.type

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

    Appends all elements of this priority queue 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 priority queue, 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()
  14. def addString(b: StringBuilder, start: String, sep: String, end: String): b.type

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

    Appends all elements of this priority queue 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 priority queue 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
  15. 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.

  16. 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 priority queue. By default the string prefix is the simple name of the collection class priority queue.

    Attributes
    protected[this]
    Definition Classes
    PriorityQueueIterable
  17. def clear(): Unit

    Removes all elements from the queue.

    Removes all elements from the queue. After this operation is completed, the queue will be empty.

    Definition Classes
    PriorityQueueBuilderClearable
  18. def clone(): PriorityQueue[A]

    This method clones the priority queue.

    This method clones the priority queue.

    returns

    a priority queue with the same elements.

    Definition Classes
    PriorityQueueCloneable → AnyRef
  19. final def coll: PriorityQueue.this.type

    returns

    This collection as a C.

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

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

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

    B

    the element type of the returned priority queue.

    pf

    the partial function which filters and maps the priority queue.

    returns

    a new priority queue 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
  21. def collectFirst[B](pf: PartialFunction[A, B]): Option[B]

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

    Finds the first element of the priority queue 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)

  22. def concat[B >: A](suffix: IterableOnce[B]): Iterable[B]

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

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

    B

    the element type of the returned collection.

    suffix

    the traversable to append.

    returns

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

    Definition Classes
    IterableOps
  23. def copyToArray[B >: A](xs: Array[B], start: 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 priority queue.

    Copying will stop once either all the elements of this priority queue 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.

    xs

    the array to fill.

    start

    the starting index of xs.

    len

    the maximal number of elements to copy.

    returns

    the number of elements written to the array

    Definition Classes
    PriorityQueueIterableOnceOps
    Note

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

  24. 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 priority queue.

    Copying will stop once either all the elements of this priority queue 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.

  25. 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 priority queue.

    Copying will stop once either all the elements of this priority queue 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.

  26. 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
  27. def count(p: (A) => Boolean): Int

    Counts the number of elements in the priority queue which satisfy a predicate.

    Counts the number of elements in the priority queue which satisfy a predicate.

    p

    the predicate used to test elements.

    returns

    the number of elements satisfying the predicate p.

    Definition Classes
    IterableOnceOps
  28. def dequeue(): A

    Returns the element with the highest priority in the queue, and removes this element from the queue.

    Returns the element with the highest priority in the queue, and removes this element from the queue.

    returns

    the element with the highest priority.

    Exceptions thrown
  29. def dequeueAll[A1 >: A]: immutable.Seq[A1]
  30. def drop(n: Int): PriorityQueue[A]

    Selects all elements except first n ones.

    Selects all elements except first n ones.

    n

    the number of elements to drop from this priority queue.

    returns

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

    Definition Classes
    IterableOpsIterableOnceOps
  31. def dropRight(n: Int): PriorityQueue[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 priority queue.

    returns

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

    Definition Classes
    StrictOptimizedIterableOpsIterableOps
  32. def dropWhile(p: (A) => Boolean): PriorityQueue[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 priority queue whose first element does not satisfy the predicate p.

    Definition Classes
    IterableOpsIterableOnceOps
  33. def empty: PriorityQueue[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
    PriorityQueueIterableFactoryDefaultsIterableOps
  34. def enqueue(elems: A*): Unit

    Adds all elements to the queue.

    Adds all elements to the queue.

    elems

    the elements to add.

  35. def ensuring(cond: (PriorityQueue[A]) => Boolean, msg: => Any): PriorityQueue[A]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toEnsuring[PriorityQueue[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  36. def ensuring(cond: (PriorityQueue[A]) => Boolean): PriorityQueue[A]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toEnsuring[PriorityQueue[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  37. def ensuring(cond: Boolean, msg: => Any): PriorityQueue[A]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toEnsuring[PriorityQueue[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  38. def ensuring(cond: Boolean): PriorityQueue[A]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toEnsuring[PriorityQueue[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  39. 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
  40. def equals(arg0: AnyRef): Boolean

    The equality method for reference types.

    The equality method for reference types. Default implementation delegates to eq.

    See also equals in scala.Any.

    returns

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

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

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

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

    p

    the predicate used to test elements.

    returns

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

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

    Selects all elements of this priority queue which satisfy a predicate.

    Selects all elements of this priority queue which satisfy a predicate.

    returns

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

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
  43. def filterImpl(pred: (A) => Boolean, isFlipped: Boolean): PriorityQueue[A]
    Attributes
    protected[collection]
    Definition Classes
    StrictOptimizedIterableOps
  44. def filterNot(pred: (A) => Boolean): PriorityQueue[A]

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

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

    pred

    the predicate used to test elements.

    returns

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

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
  45. 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

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

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

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

    p

    the predicate used to test elements.

    returns

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

    Definition Classes
    IterableOnceOps
  47. def fixDown(as: Array[AnyRef], m: Int, n: Int): Boolean
    Attributes
    protected
  48. def fixUp(as: Array[AnyRef], m: Int): Unit
    Attributes
    protected
  49. def flatMap[B](f: (A) => IterableOnce[B]): Iterable[B]

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

    Builds a new priority queue by applying a function to all elements of this priority queue 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 priority queue. 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 priority queue resulting from applying the given collection-valued function f to each element of this priority queue and concatenating the results.

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
  50. def flatten[B](implicit toIterableOnce: (A) => IterableOnce[B]): Iterable[B]

    Converts this priority queue of traversable collections into a priority queue formed by the elements of these traversable collections.

    Converts this priority queue of traversable collections into a priority queue formed by the elements of these traversable collections.

    The resulting collection's type will be guided by the type of priority queue. 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 traversable collection.

    returns

    a new priority queue resulting from concatenating all element priority queues.

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

    Folds the elements of this priority queue using the specified associative binary operator.

    Folds the elements of this priority queue 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 priority queue is empty.

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

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

    Applies a binary operator to a start value and all elements of this priority queue, 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 priority queue, 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 priority queue. Returns z if this priority queue is empty.

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

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

    Applies a binary operator to all elements of this priority queue 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 priority queue, 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 priority queue. Returns z if this priority queue is empty.

    Definition Classes
    IterableOnceOps
  54. def forall(p: (A) => Boolean): Boolean

    Tests whether a predicate holds for all elements of this priority queue.

    Tests whether a predicate holds for all elements of this priority queue.

    p

    the predicate used to test elements.

    returns

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

    Definition Classes
    IterableOnceOps
  55. 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
  56. def fromSpecific(coll: IterableOnce[A]): PriorityQueue[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
    PriorityQueueIterableFactoryDefaultsIterableOps
    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.

  57. 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()
  58. def groupBy[K](f: (A) => K): immutable.Map[K, PriorityQueue[A]]

    Partitions this priority queue into a map of priority queues according to some discriminator function.

    Partitions this priority queue into a map of priority queues 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 priority queues 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 priority queue of those elements x for which f(x) equals k.

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

    Partitions this priority queue into a map of priority queues according to a discriminator function key.

    Partitions this priority queue into a map of priority queues 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
  60. def groupMapReduce[K, B](key: (A) => K)(f: (A) => B)(reduce: (B, B) => B): immutable.Map[K, B]

    Partitions this priority queue into a map according to a discriminator function key.

    Partitions this priority queue 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
  61. def grouped(size: Int): Iterator[PriorityQueue[A]]

    Partitions elements in fixed size priority queues.

    Partitions elements in fixed size priority queues.

    size

    the number of elements per group

    returns

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

    Definition Classes
    IterableOps
    See also

    scala.collection.Iterator, method grouped

  62. 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
    AnyRef → Any
    Annotations
    @native()
  63. def head: A

    Returns the element with the highest priority in the queue, or throws an error if there is no element contained in the queue.

    Returns the element with the highest priority in the queue, or throws an error if there is no element contained in the queue.

    returns

    the element with the highest priority.

    Definition Classes
    PriorityQueueIterableOps
  64. def headOption: Option[A]

    Optionally selects the first element.

    Optionally selects the first element.

    returns

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

    Definition Classes
    IterableOps
  65. def init: PriorityQueue[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
  66. def inits: Iterator[PriorityQueue[A]]

    Iterates over the inits of this priority queue.

    Iterates over the inits of this priority queue. The first value will be this priority queue and the final one will be an empty priority queue, 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 priority queue

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

  67. def isEmpty: Boolean

    Tests whether the priority queue is empty.

    Tests whether the priority queue is empty.

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

    returns

    true if the priority queue contains no elements, false otherwise.

    Definition Classes
    PriorityQueueIterableOnceOps
  68. 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.

  69. def isTraversableAgain: Boolean

    Tests whether this priority queue can be repeatedly traversed.

    Tests whether this priority queue 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
  70. def iterableFactory: IterableFactory[Iterable]

    The companion object of this priority queue, providing various factory methods.

    The companion object of this priority queue, providing various factory methods.

    Definition Classes
    IterableIterableIterableOps
    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).

  71. def iterator: Iterator[A]

    Returns an iterator which yields all the elements.

    Returns an iterator which yields all the elements.

    Note: The order of elements returned is undefined. If you want to traverse the elements in priority queue order, use clone().dequeueAll.iterator.

    returns

    an iterator over all the elements.

    Definition Classes
    PriorityQueueIterableOnce
  72. def knownSize: Int

    returns

    The number of elements in the collection under construction, if it can be cheaply computed, -1 otherwise. The default implementation always returns -1.

    Definition Classes
    PriorityQueueGrowableIterableOnce
  73. def last: A

    Selects the last element.

    Selects the last element.

    returns

    The last element of this priority queue.

    Definition Classes
    IterableOps
    Exceptions thrown

    NoSuchElementException If the priority queue is empty.

  74. def lastOption: Option[A]

    Optionally selects the last element.

    Optionally selects the last element.

    returns

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

    Definition Classes
    IterableOps
  75. def lazyZip[B](that: collection.Iterable[B]): LazyZip2[A, B, PriorityQueue.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
  76. def length: Int
  77. def map[B](f: (A) => B): Iterable[B]

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

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

    B

    the element type of the returned priority queue.

    f

    the function to apply to each element.

    returns

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

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
  78. def mapInPlace(f: (A) => A): PriorityQueue.this.type
  79. def mapResult[NewTo](f: (PriorityQueue[A]) => NewTo): Builder[A, NewTo]

    A builder resulting from this builder my mapping the result using f.

    A builder resulting from this builder my mapping the result using f.

    Definition Classes
    Builder
  80. 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 priority queue with respect to the ordering ord.

    Definition Classes
    IterableOnceOps
    Exceptions thrown

    UnsupportedOperationException if this priority queue is empty.

  81. def maxBy[B](f: (A) => B)(implicit cmp: 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.

    cmp

    An ordering to be used for comparing elements.

    returns

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

    Definition Classes
    IterableOnceOps
    Exceptions thrown

    UnsupportedOperationException if this priority queue is empty.

  82. def maxByOption[B](f: (A) => B)(implicit cmp: 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.

    cmp

    An ordering to be used for comparing elements.

    returns

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

    Definition Classes
    IterableOnceOps
  83. 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 priority queue with respect to the ordering ord.

    Definition Classes
    IterableOnceOps
  84. 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 priority queue with respect to the ordering ord.

    Definition Classes
    IterableOnceOps
    Exceptions thrown

    UnsupportedOperationException if this priority queue is empty.

  85. def minBy[B](f: (A) => B)(implicit cmp: 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.

    cmp

    An ordering to be used for comparing elements.

    returns

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

    Definition Classes
    IterableOnceOps
    Exceptions thrown

    UnsupportedOperationException if this priority queue is empty.

  86. def minByOption[B](f: (A) => B)(implicit cmp: 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.

    cmp

    An ordering to be used for comparing elements.

    returns

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

    Definition Classes
    IterableOnceOps
  87. 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 priority queue with respect to the ordering ord.

    Definition Classes
    IterableOnceOps
  88. final def mkString: String

    Displays all elements of this priority queue in a string.

    Displays all elements of this priority queue in a string.

    Delegates to addString, which can be overridden.

    returns

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

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

    Displays all elements of this priority queue in a string using a separator string.

    Displays all elements of this priority queue in a string using a separator string.

    Delegates to addString, which can be overridden.

    sep

    the separator string.

    returns

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

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

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

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

    Displays all elements of this priority queue 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 priority queue. 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 priority queue are separated by the string sep.

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

  91. 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
  92. def newSpecificBuilder: Builder[A, PriorityQueue[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
    PriorityQueueIterableFactoryDefaultsIterableOps
    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.

  93. def nonEmpty: Boolean

    Tests whether the priority queue is not empty.

    Tests whether the priority queue is not empty.

    returns

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

    Definition Classes
    IterableOnceOps
    Annotations
    @deprecatedOverriding()
  94. 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

  95. 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

  96. implicit val ord: math.Ordering[A]
  97. def partition(p: (A) => Boolean): (PriorityQueue[A], PriorityQueue[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
  98. def partitionMap[A1, A2](f: (A) => Either[A1, A2]): (Iterable[A1], Iterable[A2])

    Applies a function f to each element of the priority queue and returns a pair of priority queues: 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 priority queue and returns a pair of priority queues: 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 = PriorityQueue(1, "one", 2, "two", 3, "three") partitionMap {
     case i: Int => Left(i)
     case s: String => Right(s)
    }
    // xs == (PriorityQueue(1, 2, 3),
    //        PriorityQueue(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 priority queue to an scala.util.Either

    returns

    a pair of priority queues: 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
  99. def product[B >: A](implicit num: math.Numeric[B]): B

    Multiplies up the elements of this collection.

    Multiplies up the elements of this collection.

    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 priority queue with respect to the * operator in num.

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

    Reduces the elements of this priority queue using the specified associative binary operator.

    Reduces the elements of this priority queue 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 priority queue is nonempty.

    Definition Classes
    IterableOnceOps
    Exceptions thrown

    UnsupportedOperationException if this priority queue is empty.

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

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

    Applies a binary operator to all elements of this priority queue, 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 priority queue, going left to right: op( op( ... op(x1, x2) ..., xn-1), xn) where x1, ..., xn are the elements of this priority queue.

    Definition Classes
    IterableOnceOps
    Exceptions thrown

    UnsupportedOperationException if this priority queue is empty.

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

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

    Optionally applies a binary operator to all elements of this priority queue, 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 priority queue is nonempty, None otherwise.

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

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

    Reduces the elements of this priority queue, 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
  104. def reduceRight[B >: A](op: (A, B) => B): B

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

    Applies a binary operator to all elements of this priority queue, 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 priority queue, going right to left: op(x1, op(x2, ..., op(xn-1, xn)...)) where x1, ..., xn are the elements of this priority queue.

    Definition Classes
    IterableOnceOps
    Exceptions thrown

    UnsupportedOperationException if this priority queue is empty.

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

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

    Optionally applies a binary operator to all elements of this priority queue, 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 priority queue is nonempty, None otherwise.

    Definition Classes
    IterableOnceOps
  106. def result(): PriorityQueue[A]

    Result collection consisting of all elements appended so far.

    Result collection consisting of all elements appended so far.

    Definition Classes
    PriorityQueueBuilder
  107. def reverse: PriorityQueue[A]

    Returns the reverse of this priority queue.

    Returns the reverse of this priority queue. The new priority queue has the same elements as the original, but the opposite ordering.

    For example, the element with the highest priority in pq has the lowest priority in pq.reverse, and vice versa.

    Ties are handled arbitrarily. Elements with equal priority may or may not be reversed with respect to each other.

    returns

    the reversed priority queue.

  108. def reverseIterator: Iterator[A]

    Returns an iterator which yields all the elements in the reverse order than that returned by the method iterator.

    Returns an iterator which yields all the elements in the reverse order than that returned by the method iterator.

    Note: The order of elements returned is undefined.

    returns

    an iterator over all elements sorted in descending order.

  109. def reversed: collection.Iterable[A]
    Attributes
    protected
    Definition Classes
    IterableOnceOps
  110. def scan[B >: A](z: B)(op: (B, B) => B): Iterable[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 priority queue containing the prefix scan of the elements in this priority queue

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

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

    Produces a priority queue 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
  112. def scanRight[B](z: B)(op: (A, B) => B): Iterable[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
  113. def size: Int

    The size of this priority queue.

    The size of this priority queue.

    returns

    the number of elements in this priority queue.

    Definition Classes
    PriorityQueueIterableOnceOps
  114. def sizeCompare(that: collection.Iterable[_]): Int

    Compares the size of this priority queue to the size of another Iterable.

    Compares the size of this priority queue to the size of another Iterable.

    that

    the Iterable whose size is compared with this priority queue'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
    IterableOps
  115. def sizeCompare(otherSize: Int): Int

    Compares the size of this priority queue to a test value.

    Compares the size of this priority queue 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
    IterableOps
    See also

    sizeIs

  116. final def sizeHint(coll: IterableOnce[_], delta: Int = 0): Unit

    Gives a hint that one expects the result of this builder to have the same size as the given collection, plus some delta.

    Gives a hint that one expects the result of this builder to have the same size as the given collection, plus some delta. This will provide a hint only if the collection has a known size Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.

    coll

    the collection which serves as a hint for the result's size.

    delta

    a correction to add to the coll.size to produce the size hint.

    Definition Classes
    Builder
  117. def sizeHint(size: Int): Unit

    Gives a hint how many elements are expected to be added when the next result is called.

    Gives a hint how many elements are expected to be added when the next result is called. Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.

    size

    the hint how many elements will be added.

    Definition Classes
    Builder
  118. final def sizeHintBounded(size: Int, boundingColl: collection.Iterable[_]): Unit

    Gives a hint how many elements are expected to be added when the next result is called, together with an upper bound given by the size of some other collection.

    Gives a hint how many elements are expected to be added when the next result is called, together with an upper bound given by the size of some other collection. Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.

    size

    the hint how many elements will be added.

    boundingColl

    the bounding collection. If it is an IndexedSeqLike, then sizes larger than collection's size are reduced.

    Definition Classes
    Builder
  119. final def sizeIs: SizeCompareOps

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

    Returns a value class containing operations for comparing the size of this priority queue 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()
  120. def slice(from: Int, until: Int): PriorityQueue[A]

    Selects an interval of elements.

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

    from <= indexOf(x) < until
    from

    the lowest index to include from this priority queue.

    until

    the lowest index to EXCLUDE from this priority queue.

    returns

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

    Definition Classes
    IterableOpsIterableOnceOps
  121. def sliding(size: Int, step: Int): Iterator[PriorityQueue[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.

    size

    the number of elements per group

    step

    the distance between the first elements of successive groups

    returns

    An iterator producing priority queues 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
    IterableOps
    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

  122. def sliding(size: Int): Iterator[PriorityQueue[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 priority queues 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

  123. def span(p: (A) => Boolean): (PriorityQueue[A], PriorityQueue[A])

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

    Splits this priority queue 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 priority queue whose elements all satisfy p, and the rest of this priority queue.

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
  124. def splitAt(n: Int): (PriorityQueue[A], PriorityQueue[A])

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

    Splits this priority queue 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 priority queues consisting of the first n elements of this priority queue, and the other elements.

    Definition Classes
    IterableOpsIterableOnceOps
  125. def stepper[S <: Stepper[_]](implicit shape: StepperShape[A, S]): S

    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
    IterableOnce
  126. 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()
  127. 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()
  128. 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()
  129. 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()
  130. 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()
  131. 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()
  132. def stringPrefix: String
    Attributes
    protected[this]
    Definition Classes
    Iterable
    Annotations
    @deprecatedOverriding()
  133. def sum[B >: A](implicit num: math.Numeric[B]): B

    Sums up the elements of this collection.

    Sums up the elements of this collection.

    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 priority queue with respect to the + operator in num.

    Definition Classes
    IterableOnceOps
  134. 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
  135. def tail: PriorityQueue[A]

    The rest of the collection without its first element.

    The rest of the collection without its first element.

    Definition Classes
    IterableOps
  136. def tails: Iterator[PriorityQueue[A]]

    Iterates over the tails of this priority queue.

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

    returns

    an iterator over all the tails of this priority queue

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

  137. def take(n: Int): PriorityQueue[A]

    Selects the first n elements.

    Selects the first n elements.

    n

    the number of elements to take from this priority queue.

    returns

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

    Definition Classes
    IterableOpsIterableOnceOps
  138. def takeRight(n: Int): PriorityQueue[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 priority queue.

    returns

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

    Definition Classes
    StrictOptimizedIterableOpsIterableOps
  139. def takeWhile(p: (A) => Boolean): PriorityQueue[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 priority queue whose elements all satisfy the predicate p.

    Definition Classes
    IterableOpsIterableOnceOps
  140. def tapEach[U](f: (A) => U): PriorityQueue[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 priority queue

    returns

    The same logical collection as this

    Definition Classes
    StrictOptimizedIterableOpsIterableOpsIterableOnceOps
  141. 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
  142. 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
    IterableOnceOps
  143. final def toBuffer[B >: A]: Buffer[B]
    Definition Classes
    IterableOnceOps
    Annotations
    @inline()
  144. def toIndexedSeq: immutable.IndexedSeq[A]
    Definition Classes
    IterableOnceOps
  145. def toList: immutable.List[A]

    Converts this priority queue to a list.

    Converts this priority queue to a list.

    Note: the order of elements is undefined.

    returns

    a list containing all elements of this priority queue.

    Definition Classes
    PriorityQueueIterableOnceOps
  146. def toMap[K, V](implicit ev: <:<[A, (K, V)]): immutable.Map[K, V]
    Definition Classes
    IterableOnceOps
  147. def toQueue: Queue[A]

    Returns a regular queue containing the same elements.

    Returns a regular queue containing the same elements.

    Note: the order of elements is undefined.

  148. 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
  149. def toSet[B >: A]: immutable.Set[B]
    Definition Classes
    IterableOnceOps
  150. def toString(): String

    Returns a textual representation of a queue as a string.

    Returns a textual representation of a queue as a string.

    returns

    the string representation of this queue.

    Definition Classes
    PriorityQueueIterable → AnyRef → Any
  151. def toVector: immutable.Vector[A]
    Definition Classes
    IterableOnceOps
  152. def transpose[B](implicit asIterable: (A) => collection.Iterable[B]): Iterable[Iterable[B]]

    Transposes this priority queue of iterable collections into a priority queue of priority queues.

    Transposes this priority queue of iterable collections into a priority queue of priority queues.

    The resulting collection's type will be guided by the static type of priority queue. 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 priority queue is an Iterable.

    returns

    a two-dimensional priority queue of priority queues which has as nth row the nth column of this priority queue.

    Definition Classes
    IterableOps
    Exceptions thrown

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

  153. def unzip[A1, A2](implicit asPair: (A) => (A1, A2)): (Iterable[A1], Iterable[A2])

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

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

    val xs = PriorityQueue(
               (1, "one"),
               (2, "two"),
               (3, "three")).unzip
    // xs == (PriorityQueue(1, 2, 3),
    //        PriorityQueue(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 priority queue is a pair.

    returns

    a pair of priority queues, containing the first, respectively second half of each element pair of this priority queue.

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

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

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

    val xs = PriorityQueue(
               (1, "one", '1'),
               (2, "two", '2'),
               (3, "three", '3')).unzip3
    // xs == (PriorityQueue(1, 2, 3),
    //        PriorityQueue(one, two, three),
    //        PriorityQueue(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 priority queue is a triple.

    returns

    a triple of priority queues, containing the first, second, respectively third member of each element triple of this priority queue.

    Definition Classes
    StrictOptimizedIterableOpsIterableOps
  155. def view: View[A]

    A view over the elements of this collection.

    A view over the elements of this collection.

    Definition Classes
    IterableOps
  156. 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

  157. 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

  158. 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

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

    Creates a non-strict filter of this priority queue.

    Creates a non-strict filter of this priority queue.

    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 priority queue which satisfy the predicate p.

    Definition Classes
    IterableOps
  160. def writeReplace(): AnyRef
    Attributes
    protected[this]
  161. def zip[B](that: IterableOnce[B]): Iterable[(A, B)]

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

    Returns a priority queue formed from this priority queue 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 priority queue containing pairs consisting of corresponding elements of this priority queue and that. The length of the returned collection is the minimum of the lengths of this priority queue and that.

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

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

    Returns a priority queue formed from this priority queue 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 priority queue is shorter than that.

    thatElem

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

    returns

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

    Definition Classes
    IterableOps
  163. def zipWithIndex: Iterable[(A, Int)]

    Zips this priority queue with its indices.

    Zips this priority queue with its indices.

    returns

    A new priority queue containing pairs consisting of all elements of this priority queue 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. def ++:[B >: A](that: IterableOnce[B]): Iterable[B]
    Definition Classes
    IterableOps
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use ++ instead of ++: for collections of type Iterable

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

    Adds two or more elements to this priority queue.

    Adds two or more elements to this priority queue.

    elem1

    the first element to add.

    elem2

    the second element to add.

    elems

    the remaining elements to add.

    returns

    the priority queue 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

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

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

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

    (Since version 2.13.0) Use iterableFactory instead

  10. def copyToBuffer(dest: Buffer[A]): Unit
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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.copyToBuffer(...) instead

  11. 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

  12. def count(f: (A) => Boolean): Int
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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.count(...) instead

  13. def exists(f: (A) => Boolean): Boolean
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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.exists(...) instead

  14. def filter(f: (A) => Boolean): Iterator[A]
    Implicit
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    Definition Classes
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    (Since version 2.13.0) Use .iterator.filter(...) instead

  15. def find(p: (A) => Boolean): Option[A]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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.find instead

  16. def flatMap[B](f: (A) => IterableOnce[B]): IterableOnce[B]
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    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (Since version 2.13.0) Use .iterator.flatMap instead or consider requiring an Iterable

  17. def fold[A1 >: A](z: A1)(op: (A1, A1) => A1): A1
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (Since version 2.13.0) Use .iterator.fold instead

  18. def foldLeft[B](z: B)(op: (B, A) => B): B
    Implicit
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    (Since version 2.13.0) Use .iterator.foldLeft instead

  19. def foldRight[B](z: B)(op: (A, B) => B): B
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    Deprecated

    (Since version 2.13.0) Use .iterator.foldRight instead

  20. def forall(f: (A) => Boolean): Boolean
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (Since version 2.13.0) Use .iterator.forall(...) instead

  21. def foreach[U](f: (A) => U): Unit
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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  22. 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 PriorityQueue[A] toStringFormat[PriorityQueue[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.

  23. def hasDefiniteSize: Boolean

    Tests whether this priority queue is known to have a finite size.

    Tests whether this priority queue 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

  24. def isEmpty: Boolean
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (Since version 2.13.0) Use .iterator.isEmpty instead

  25. def map[B](f: (A) => B): IterableOnce[B]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (Since version 2.13.0) Use .iterator.map instead or consider requiring an Iterable

  26. def max(implicit ord: math.Ordering[A]): A
    Implicit
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    (Since version 2.13.0) Use .iterator.max instead

  27. def maxBy[B](f: (A) => B)(implicit cmp: math.Ordering[B]): A
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (Since version 2.13.0) Use .iterator.maxBy(...) instead

  28. def min(implicit ord: math.Ordering[A]): A
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (Since version 2.13.0) Use .iterator.min instead

  29. def minBy[B](f: (A) => B)(implicit cmp: math.Ordering[B]): A
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (Since version 2.13.0) Use .iterator.minBy(...) instead

  30. def mkString: String
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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  31. def mkString(sep: String): String
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (Since version 2.13.0) Use .iterator.mkString instead

  32. def mkString(start: String, sep: String, end: String): String
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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  33. def nonEmpty: Boolean
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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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    Definition Classes
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    (Since version 2.13.0) Use .iterator.nonEmpty instead

  34. def orderedCompanion: PriorityQueue.type
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use PriorityQueue instead

  35. def product(implicit num: math.Numeric[A]): A
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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.product instead

  36. def reduce(f: (A, A) => A): A
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (Since version 2.13.0) Use .iterator.reduce(...) instead

  37. def reduceLeft(f: (A, A) => A): A
    Implicit
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    (Since version 2.13.0) Use .iterator.reduceLeft(...) instead

  38. def reduceLeftOption(f: (A, A) => A): Option[A]
    Implicit
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    (Since version 2.13.0) Use .iterator.reduceLeftOption(...) instead

  39. def reduceOption(f: (A, A) => A): Option[A]
    Implicit
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    (Since version 2.13.0) Use .iterator.reduceOption(...) instead

  40. def reduceRight(f: (A, A) => A): A
    Implicit
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    (Since version 2.13.0) Use .iterator.reduceRight(...) instead

  41. def reduceRightOption(f: (A, A) => A): Option[A]
    Implicit
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    (Since version 2.13.0) Use .iterator.reduceRightOption(...) instead

  42. final def repr: PriorityQueue[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

  43. def sameElements[B >: A](that: IterableOnce[B]): Boolean
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Definition Classes
    IterableOnceExtensionMethods
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    @deprecated
    Deprecated

    (Since version 2.13.0) Use .iterator.sameElements instead

  44. def seq: PriorityQueue.this.type
    Definition Classes
    Iterable
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Iterable.seq always returns the iterable itself

  45. def size: Int
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (Since version 2.13.0) Use .iterator.size instead

  46. def sum(implicit num: math.Numeric[A]): A
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (Since version 2.13.0) Use .iterator.sum instead

  47. def to[C1](factory: Factory[A, C1]): C1
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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.to(factory) instead

  48. def toArray[B >: A](implicit arg0: ClassTag[B]): Array[B]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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.toArray

  49. def toBuffer[B >: A]: Buffer[B]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    (priorityQueue: IterableOnceExtensionMethods[A]).toBuffer
    Definition Classes
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    @deprecated
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    (Since version 2.13.0) Use .iterator.to(ArrayBuffer) instead

  50. def toIndexedSeq: collection.IndexedSeq[A]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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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    Definition Classes
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    Deprecated

    (Since version 2.13.0) Use .iterator.toIndexedSeq instead

  51. final def toIterable: collection.Iterable[A]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    Definition Classes
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    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .iterator.to(Iterable) instead

  52. final def toIterable: PriorityQueue.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

  53. def toIterator: Iterator[A]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toIterableOnceExtensionMethods[A] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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    Deprecated

    (Since version 2.13.0) Use .iterator instead

  54. final def toIterator: Iterator[A]
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .iterator instead of .toIterator

  55. def toList: immutable.List[A]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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.to(List) instead

  56. def toMap[K, V](implicit ev: <:<[A, (K, V)]): immutable.Map[K, V]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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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    (priorityQueue: IterableOnceExtensionMethods[A]).toMap(ev)
    Definition Classes
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    (Since version 2.13.0) Use .iterator.to(Map) instead

  57. def toSeq: immutable.Seq[A]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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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    Definition Classes
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    Deprecated

    (Since version 2.13.0) Use .iterator.to(Seq) instead

  58. def toSet[B >: A]: immutable.Set[B]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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:
    (priorityQueue: IterableOnceExtensionMethods[A]).toSet
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .iterator.to(Set) instead

  59. def toStream: immutable.Stream[A]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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:
    (priorityQueue: IterableOnceExtensionMethods[A]).toStream
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .iterator.to(LazyList) instead

  60. final def toStream: immutable.Stream[A]
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .to(LazyList) instead of .toStream

  61. final def toTraversable: collection.Traversable[A]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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:
    (priorityQueue: IterableOnceExtensionMethods[A]).toTraversable
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .iterator.to(Iterable) instead

  62. final def toTraversable: collection.Traversable[A]

    Converts this priority queue to an unspecified Iterable.

    Converts this priority queue to an unspecified Iterable. Will return the same collection if this instance is already Iterable.

    returns

    An Iterable containing all elements of this priority queue.

    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

  63. def toVector: immutable.Vector[A]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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:
    (priorityQueue: IterableOnceExtensionMethods[A]).toVector
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .iterator.to(Vector) instead

  64. def view(from: Int, until: Int): View[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
    IterableOps
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use .view.slice(from, until) instead of .view(from, until)

  65. def withFilter(f: (A) => Boolean): Iterator[A]
    Implicit
    This member is added by an implicit conversion from PriorityQueue[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:
    (priorityQueue: IterableOnceExtensionMethods[A]).withFilter(f)
    Definition Classes
    IterableOnceExtensionMethods
    Annotations
    @deprecated
    Deprecated

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

  66. def [B](y: B): (PriorityQueue[A], B)
    Implicit
    This member is added by an implicit conversion from PriorityQueue[A] toArrowAssoc[PriorityQueue[A]] performed by method ArrowAssoc in scala.Predef.
    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 java.io.Serializable

Inherited from Cloneable[PriorityQueue[A]]

Inherited from java.lang.Cloneable

Inherited from Builder[A, PriorityQueue[A]]

Inherited from Growable[A]

Inherited from Clearable

Inherited from AbstractIterable[A]

Inherited from Iterable[A]

Inherited from collection.AbstractIterable[A]

Inherited from collection.Iterable[A]

Inherited from IterableFactoryDefaults[A, [x]Iterable[x]]

Inherited from IterableOps[A, [_]Iterable[_], PriorityQueue[A]]

Inherited from IterableOnceOps[A, [_]Iterable[_], PriorityQueue[A]]

Inherited from IterableOnce[A]

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion iterableOnceExtensionMethods fromPriorityQueue[A] to IterableOnceExtensionMethods[A]

Inherited by implicit conversion any2stringadd fromPriorityQueue[A] to any2stringadd[PriorityQueue[A]]

Inherited by implicit conversion StringFormat fromPriorityQueue[A] to StringFormat[PriorityQueue[A]]

Inherited by implicit conversion Ensuring fromPriorityQueue[A] to Ensuring[PriorityQueue[A]]

Inherited by implicit conversion ArrowAssoc fromPriorityQueue[A] to ArrowAssoc[PriorityQueue[A]]

Ungrouped