object View extends IterableFactory[View]
This object reifies operations on views as case classes
- Annotations
- @SerialVersionUID()
- Source
- View.scala
- Alphabetic
- By Inheritance
- View
- IterableFactory
- Serializable
- AnyRef
- Any
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- Public
- Protected
Type Members
- class Appended[+A] extends AbstractView[A]
A view that appends an element to its elements
A view that appends an element to its elements
- Annotations
- @SerialVersionUID()
- class Collect[+A, B] extends AbstractView[B]
A view that collects elements of the underlying collection.
A view that collects elements of the underlying collection.
- Annotations
- @SerialVersionUID()
- class Concat[A] extends AbstractView[A]
A view that concatenates elements of the prefix collection or iterator with the elements of the suffix collection or iterator.
A view that concatenates elements of the prefix collection or iterator with the elements of the suffix collection or iterator.
- Annotations
- @SerialVersionUID()
- class DistinctBy[A, B] extends AbstractView[A]
A view that removes the duplicated elements as determined by the transformation function
f
A view that removes the duplicated elements as determined by the transformation function
f
- Annotations
- @SerialVersionUID()
- class Drop[A] extends AbstractView[A]
A view that drops leading elements of the underlying collection.
A view that drops leading elements of the underlying collection.
- Annotations
- @SerialVersionUID()
- class DropRight[A] extends AbstractView[A]
A view that drops trailing elements of the underlying collection.
A view that drops trailing elements of the underlying collection.
- Annotations
- @SerialVersionUID()
- class DropWhile[A] extends AbstractView[A]
- Annotations
- @SerialVersionUID()
- class Elems[A] extends AbstractView[A]
A view with given elements
A view with given elements
- Annotations
- @SerialVersionUID()
- class Fill[A] extends AbstractView[A]
A view containing the results of some element computation a number of times.
A view containing the results of some element computation a number of times.
- Annotations
- @SerialVersionUID()
- class Filter[A] extends AbstractView[A]
A view that filters an underlying collection.
A view that filters an underlying collection.
- Annotations
- @SerialVersionUID()
- class FlatMap[A, B] extends AbstractView[B]
A view that flatmaps elements of the underlying collection.
A view that flatmaps elements of the underlying collection.
- Annotations
- @SerialVersionUID()
- class Iterate[A] extends AbstractView[A]
A view containing repeated applications of a function to a start value
A view containing repeated applications of a function to a start value
- Annotations
- @SerialVersionUID()
- class LeftPartitionMapped[A, A1, A2] extends AbstractView[A1]
- Annotations
- @SerialVersionUID()
- class Map[+A, +B] extends AbstractView[B]
A view that maps elements of the underlying collection.
A view that maps elements of the underlying collection.
- Annotations
- @SerialVersionUID()
- class PadTo[A] extends AbstractView[A]
- Annotations
- @SerialVersionUID()
- class Prepended[+A] extends AbstractView[A]
A view that prepends an element to its elements
A view that prepends an element to its elements
- Annotations
- @SerialVersionUID()
- class RightPartitionMapped[A, A1, A2] extends AbstractView[A2]
- Annotations
- @SerialVersionUID()
- class ScanLeft[+A, +B] extends AbstractView[B]
- Annotations
- @SerialVersionUID()
- class Single[A] extends AbstractView[A]
A view with exactly one element
A view with exactly one element
- Annotations
- @SerialVersionUID()
- type SomeIterableOps[A] = IterableOps[A, AnyConstr, _]
An
IterableOps
whose collection type and collection type constructor are unknown - class Tabulate[A] extends AbstractView[A]
A view containing values of a given function over a range of integer values starting from 0.
A view containing values of a given function over a range of integer values starting from 0.
- Annotations
- @SerialVersionUID()
- class Take[+A] extends AbstractView[A]
A view that takes leading elements of the underlying collection.
A view that takes leading elements of the underlying collection.
- Annotations
- @SerialVersionUID()
- class TakeRight[+A] extends AbstractView[A]
A view that takes trailing elements of the underlying collection.
A view that takes trailing elements of the underlying collection.
- Annotations
- @SerialVersionUID()
- class TakeWhile[A] extends AbstractView[A]
- Annotations
- @SerialVersionUID()
- class Unfold[A, S] extends AbstractView[A]
A view that uses a function
f
to produce elements of typeA
and update an internal stateS
.A view that uses a function
f
to produce elements of typeA
and update an internal stateS
.- Annotations
- @SerialVersionUID()
- class Updated[A] extends AbstractView[A]
- Annotations
- @SerialVersionUID()
- class Zip[A, B] extends AbstractView[(A, B)]
A view that zips elements of the underlying collection with the elements of another collection.
A view that zips elements of the underlying collection with the elements of another collection.
- Annotations
- @SerialVersionUID()
- class ZipAll[A, B] extends AbstractView[(A, B)]
A view that zips elements of the underlying collection with the elements of another collection.
A view that zips elements of the underlying collection with the elements of another collection. 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.
- Annotations
- @SerialVersionUID()
- class ZipWithIndex[A] extends AbstractView[(A, Int)]
- Annotations
- @SerialVersionUID()
Value Members
- 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
- final def ##: Int
Equivalent to
x.hashCode
except for boxed numeric types andnull
.Equivalent to
x.hashCode
except for boxed numeric types andnull
. 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. Fornull
returns a hashcode wherenull.hashCode
throws aNullPointerException
.- returns
a hash value consistent with ==
- Definition Classes
- AnyRef → Any
- final def ==(arg0: Any): Boolean
The expression
x == that
is equivalent toif (x eq null) that eq null else x.equals(that)
.The expression
x == that
is equivalent toif (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
- def apply[A](xs: A*): View[A]
Creates a view with the specified elements.
Creates a view with the specified elements.
- A
the type of the view's elements
- returns
a new view with elements
elems
- Definition Classes
- View → IterableFactory
- 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 aClassCastException
at runtime, while the expressionList(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 typeT0
.
- def clone(): AnyRef
Create a copy of the receiver object.
Create a copy of the receiver object.
The default implementation of the
clone
method is platform dependent.- returns
a copy of the receiver object.
- def concat[A](xss: Iterable[A]*): View[A]
Concatenates all argument collections into a single view.
Concatenates all argument collections into a single view.
- xss
the collections that are to be concatenated.
- returns
the concatenation of all the collections.
- Definition Classes
- IterableFactory
- def empty[A]: View[A]
An empty collection
- 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 ofAnyRef
, and has three additional properties:- It is consistent: for any non-null instances
x
andy
of typeAnyRef
, multiple invocations ofx.eq(y)
consistently returnstrue
or consistently returnsfalse
. - For any non-null instance
x
of typeAnyRef
,x.eq(null)
andnull.eq(x)
returnsfalse
. null.eq(null)
returnstrue
.
When overriding the
equals
orhashCode
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
- It is consistent: for any non-null instances
- def equals(arg0: AnyRef): Boolean
The equality method for reference types.
- def fill[A](n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(elem: => A): View[View[View[View[View[A]]]]]
Produces a five-dimensional view containing the results of some element computation a number of times.
Produces a five-dimensional view containing the results of some element computation a number of times.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3rd dimension
- n4
the number of elements in the 4th dimension
- n5
the number of elements in the 5th dimension
- elem
the element computation
- returns
A view that contains the results of
n1 x n2 x n3 x n4 x n5
evaluations ofelem
.
- Definition Classes
- IterableFactory
- def fill[A](n1: Int, n2: Int, n3: Int, n4: Int)(elem: => A): View[View[View[View[A]]]]
Produces a four-dimensional view containing the results of some element computation a number of times.
Produces a four-dimensional view containing the results of some element computation a number of times.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3rd dimension
- n4
the number of elements in the 4th dimension
- elem
the element computation
- returns
A view that contains the results of
n1 x n2 x n3 x n4
evaluations ofelem
.
- Definition Classes
- IterableFactory
- def fill[A](n1: Int, n2: Int, n3: Int)(elem: => A): View[View[View[A]]]
Produces a three-dimensional view containing the results of some element computation a number of times.
Produces a three-dimensional view containing the results of some element computation a number of times.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3rd dimension
- elem
the element computation
- returns
A view that contains the results of
n1 x n2 x n3
evaluations ofelem
.
- Definition Classes
- IterableFactory
- def fill[A](n1: Int, n2: Int)(elem: => A): View[View[A]]
Produces a two-dimensional view containing the results of some element computation a number of times.
Produces a two-dimensional view containing the results of some element computation a number of times.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- elem
the element computation
- returns
A view that contains the results of
n1 x n2
evaluations ofelem
.
- Definition Classes
- IterableFactory
- def fill[A](n: Int)(elem: => A): View[A]
Produces a view containing the results of some element computation a number of times.
Produces a view containing the results of some element computation a number of times.
- n
the number of elements contained in the view.
- elem
the element computation
- returns
A view that contains the results of
n
evaluations ofelem
.
- Definition Classes
- IterableFactory
- 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 betweenfinalize
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
- def from[E](it: IterableOnce[E]): View[E]
- E
View element type
- it
The
IterableOnce
to view. A properIterable
is used directly. If it is really onlyIterableOnce
it gets memoized on the first traversal.- returns
A view iterating over the given
Iterable
- Definition Classes
- View → IterableFactory
- def fromIteratorProvider[A](it: () => Iterator[A]): View[A]
- A
View element type
- it
Function creating the iterator to be used by the view. This function must always return a fresh
Iterator
, otherwise the resulting view will be effectively iterable only once.- returns
A
View[A]
whose underlying iterator is provided by theit
parameter-less function.
- final def getClass(): Class[_ <: AnyRef]
Returns the runtime class representation of the object.
- def hashCode(): Int
The hashCode method for reference types.
- final def isInstanceOf[T0]: Boolean
Test whether the dynamic type of the receiver object is
T0
.Test whether the dynamic type of the receiver object is
T0
.Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression
1.isInstanceOf[String]
will returnfalse
, while the expressionList(1).isInstanceOf[List[String]]
will returntrue
. 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 specified type.- returns
true
if the receiver object is an instance of erasure of typeT0
;false
otherwise.
- Definition Classes
- Any
- implicit def iterableFactory[A]: Factory[A, View[A]]
- Definition Classes
- IterableFactory
- def iterate[A](start: A, len: Int)(f: (A) => A): View[A]
Produces a view containing repeated applications of a function to a start value.
Produces a view containing repeated applications of a function to a start value.
- start
the start value of the view
- len
the number of elements contained in the view
- f
the function that's repeatedly applied
- returns
a view with
len
values in the sequencestart, f(start), f(f(start)), ...
- Definition Classes
- IterableFactory
- 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
- def newBuilder[A]: Builder[A, View[A]]
- A
the type of the view’s elements
- returns
A builder for View objects.
- Definition Classes
- View → IterableFactory
- 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
- 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
- def range[A](start: A, end: A, step: A)(implicit arg0: Integral[A]): View[A]
Produces a view containing equally spaced values in some integer interval.
Produces a view containing equally spaced values in some integer interval.
- start
the start value of the view
- end
the end value of the view (the first value NOT contained)
- step
the difference between successive elements of the view (must be positive or negative)
- returns
a view with values
start, start + step, ...
up to, but excludingend
- Definition Classes
- IterableFactory
- def range[A](start: A, end: A)(implicit arg0: Integral[A]): View[A]
Produces a view containing a sequence of increasing of integers.
Produces a view containing a sequence of increasing of integers.
- start
the first element of the view
- end
the end value of the view (the first value NOT contained)
- returns
a view with values
start, start + 1, ..., end - 1
- Definition Classes
- IterableFactory
- final def synchronized[T0](arg0: => T0): T0
Executes the code in
body
with an exclusive lock onthis
.Executes the code in
body
with an exclusive lock onthis
.- returns
the result of
body
- Definition Classes
- AnyRef
- def tabulate[A](n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(f: (Int, Int, Int, Int, Int) => A): View[View[View[View[View[A]]]]]
Produces a five-dimensional view containing values of a given function over ranges of integer values starting from 0.
Produces a five-dimensional view containing values of a given function over ranges of integer values starting from 0.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3rd dimension
- n4
the number of elements in the 4th dimension
- n5
the number of elements in the 5th dimension
- f
The function computing element values
- returns
A view consisting of elements
f(i1, i2, i3, i4, i5)
for0 <= i1 < n1
,0 <= i2 < n2
,0 <= i3 < n3
,0 <= i4 < n4
, and0 <= i5 < n5
.
- Definition Classes
- IterableFactory
- def tabulate[A](n1: Int, n2: Int, n3: Int, n4: Int)(f: (Int, Int, Int, Int) => A): View[View[View[View[A]]]]
Produces a four-dimensional view containing values of a given function over ranges of integer values starting from 0.
Produces a four-dimensional view containing values of a given function over ranges of integer values starting from 0.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3rd dimension
- n4
the number of elements in the 4th dimension
- f
The function computing element values
- returns
A view consisting of elements
f(i1, i2, i3, i4)
for0 <= i1 < n1
,0 <= i2 < n2
,0 <= i3 < n3
, and0 <= i4 < n4
.
- Definition Classes
- IterableFactory
- def tabulate[A](n1: Int, n2: Int, n3: Int)(f: (Int, Int, Int) => A): View[View[View[A]]]
Produces a three-dimensional view containing values of a given function over ranges of integer values starting from 0.
Produces a three-dimensional view containing values of a given function over ranges of integer values starting from 0.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3rd dimension
- f
The function computing element values
- returns
A view consisting of elements
f(i1, i2, i3)
for0 <= i1 < n1
,0 <= i2 < n2
, and0 <= i3 < n3
.
- Definition Classes
- IterableFactory
- def tabulate[A](n1: Int, n2: Int)(f: (Int, Int) => A): View[View[A]]
Produces a two-dimensional view containing values of a given function over ranges of integer values starting from 0.
Produces a two-dimensional view containing values of a given function over ranges of integer values starting from 0.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- f
The function computing element values
- returns
A view consisting of elements
f(i1, i2)
for0 <= i1 < n1
and0 <= i2 < n2
.
- Definition Classes
- IterableFactory
- def tabulate[A](n: Int)(f: (Int) => A): View[A]
Produces a view containing values of a given function over a range of integer values starting from 0.
Produces a view containing values of a given function over a range of integer values starting from 0.
- n
The number of elements in the view
- f
The function computing element values
- returns
A view consisting of elements
f(0), ..., f(n -1)
- Definition Classes
- IterableFactory
- def toString(): String
Creates a String representation of this object.
Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.
- returns
a String representation of the object.
- Definition Classes
- AnyRef → Any
- def unfold[A, S](init: S)(f: (S) => Option[(A, S)]): View[A]
Produces a view that uses a function
f
to produce elements of typeA
and update an internal state of typeS
.Produces a view that uses a function
f
to produce elements of typeA
and update an internal state of typeS
.- A
Type of the elements
- S
Type of the internal state
- init
State initial value
- f
Computes the next element (or returns
None
to signal the end of the collection)- returns
a view that produces elements using
f
untilf
returnsNone
- Definition Classes
- IterableFactory
- 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
- 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
- final def wait(arg0: Long): Unit
See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-.
- case object Empty extends AbstractView[Nothing] with Product with Serializable
The empty view
The empty view
- Annotations
- @SerialVersionUID()
- object Filter extends java.io.Serializable
This is the documentation for the Scala standard library.
Package structure
The scala package contains core types like
Int
,Float
,Array
orOption
which are accessible in all Scala compilation units without explicit qualification or imports.Notable packages include:
scala.collection
and its sub-packages contain Scala's collections frameworkscala.collection.immutable
- Immutable, sequential data-structures such asVector
,List
,Range
,HashMap
orHashSet
scala.collection.mutable
- Mutable, sequential data-structures such asArrayBuffer
,StringBuilder
,HashMap
orHashSet
scala.collection.concurrent
- Mutable, concurrent data-structures such asTrieMap
scala.concurrent
- Primitives for concurrent programming such asFutures
andPromises
scala.io
- Input and output operationsscala.math
- Basic math functions and additional numeric types likeBigInt
andBigDecimal
scala.sys
- Interaction with other processes and the operating systemscala.util.matching
- Regular expressionsOther packages exist. See the complete list on the right.
Additional parts of the standard library are shipped as separate libraries. These include:
scala.reflect
- Scala's reflection API (scala-reflect.jar)scala.xml
- XML parsing, manipulation, and serialization (scala-xml.jar)scala.collection.parallel
- Parallel collections (scala-parallel-collections.jar)scala.util.parsing
- Parser combinators (scala-parser-combinators.jar)scala.swing
- A convenient wrapper around Java's GUI framework called Swing (scala-swing.jar)Automatic imports
Identifiers in the scala package and the
scala.Predef
object are always in scope by default.Some of these identifiers are type aliases provided as shortcuts to commonly used classes. For example,
List
is an alias forscala.collection.immutable.List
.Other aliases refer to classes provided by the underlying platform. For example, on the JVM,
String
is an alias forjava.lang.String
.