Object scala.collection.View
Companion trait View
object View extends IterableFactory[View]
Type Members
class Appended[+A] extends AbstractView[A]
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.
- 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.
- Annotations
- @SerialVersionUID()
class DistinctBy[A, B] extends AbstractView[A]
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.
- Annotations
- @SerialVersionUID()
class DropRight[A] extends AbstractView[A]
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
- Annotations
- @SerialVersionUID()
class Fill[A] extends AbstractView[A]
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.
- Annotations
- @SerialVersionUID()
class FlatMap[A, B] extends AbstractView[B]
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
- 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.
- 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
- 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
- Annotations
- @SerialVersionUID()
type SomeIterableOps[A] = IterableOps[A, AnyConstr, _]
class Tabulate[A] extends AbstractView[A]
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.
- Annotations
- @SerialVersionUID()
class TakeRight[+A] extends AbstractView[A]
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 type A and update an internal state S.
- 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.
- 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. 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.
- returns
trueif !(this == that), false otherwise.
- Definition Classes
- AnyRef → Any
final def ##(): Int
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
final def ==(arg0: Any): Boolean
The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).
- returns
trueif the receiver object is equivalent to the argument;falseotherwise.
- Definition Classes
- AnyRef → Any
def apply[A](xs: A*): View[A]
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.
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
ClassCastExceptionif the receiver object is not an instance of the erasure of typeT0.
def clone(): AnyRef
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 collection.
- xss
the collections that are to be concatenated.
- returns
the concatenation of all the collections.
- Definition Classes
- IterableFactory
def empty[A]: View[A]
final def eq(arg0: AnyRef): Boolean
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
trueif the argument is a reference to the receiver object;falseotherwise.
- Definition Classes
- AnyRef
def equals(arg0: AnyRef): Boolean
The equality method for reference types. Default implementation delegates to eq.
See also equals in scala.Any.
- returns
trueif the receiver object is equivalent to the argument;falseotherwise.
- Definition Classes
- AnyRef → Any
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 collection 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 collection that contains the results of
n1 x n2 x n3 x n4 x n5evaluations 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 collection 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 collection that contains the results of
n1 x n2 x n3 x n4evaluations ofelem.
- Definition Classes
- IterableFactory
def fill[A](n1: Int, n2: Int, n3: Int)(elem: => A): View[View[View[A]]]
Produces a three-dimensional collection 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 collection that contains the results of
n1 x n2 x n3evaluations ofelem.
- Definition Classes
- IterableFactory
def fill[A](n1: Int, n2: Int)(elem: => A): View[View[A]]
Produces a two-dimensional collection 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 collection that contains the results of
n1 x n2evaluations ofelem.
- Definition Classes
- IterableFactory
def fill[A](n: Int)(elem: => A): View[A]
Produces a collection containing the results of some element computation a number of times.
- n
the number of elements contained in the collection.
- elem
the element computation
- returns
A collection that contains the results of
nevaluations 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.
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.
def from[E](it: IterableOnce[E]): View[E]
- E
View element type
- it
The
IterableOnceto view. A properIterableis used directly. If it is really onlyIterableOnceit 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 theitparameter-less function.
final def getClass(): Class[_ <: AnyRef]
Returns the runtime class representation of the object.
- returns
a class object corresponding to the runtime type of the receiver.
def hashCode(): Int
The hashCode method for reference types. See hashCode in scala.Any.
- returns
the hash code value for this object.
final def isInstanceOf[T0]: Boolean
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 return false, while the expression List(1).isInstanceOf[List[String]] will return true. 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
trueif the receiver object is an instance of erasure of typeT0;falseotherwise.
- 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 collection containing repeated applications of a function to a start value.
- start
the start value of the collection
- len
the number of elements contained in the collection
- f
the function that's repeatedly applied
- returns
a collection with
lenvalues in the sequencestart, f(start), f(f(start)), ...
- Definition Classes
- IterableFactory
final def ne(arg0: AnyRef): Boolean
Equivalent to !(this eq that).
- returns
trueif the argument is not a reference to the receiver object;falseotherwise.
- 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.
- 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.
- 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 collection containing equally spaced values in some integer interval.
- start
the start value of the collection
- end
the end value of the collection (the first value NOT contained)
- step
the difference between successive elements of the collection (must be positive or negative)
- returns
a collection 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 collection containing a sequence of increasing of integers.
- start
the first element of the collection
- end
the end value of the collection (the first value NOT contained)
- returns
a collection with values
start, start + 1, ..., end - 1
- Definition Classes
- IterableFactory
final def synchronized[T0](arg0: => T0): T0
- 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 collection 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 collection 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 collection 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 collection 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 collection 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 collection 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 collection 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 collection consisting of elements
f(i1, i2)for0 <= i1 < n1and0 <= i2 < n2.
- Definition Classes
- IterableFactory
def tabulate[A](n: Int)(f: (Int) => A): View[A]
Produces a collection containing values of a given function over a range of integer values starting from 0.
- n
The number of elements in the collection
- f
The function computing element values
- returns
A collection consisting of elements
f(0), ..., f(n -1)
- Definition Classes
- IterableFactory
def toString(): String
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 collection that uses a function f to produce elements of type A and update an internal state of type S.
- A
Type of the elements
- S
Type of the internal state
- init
State initial value
- f
Computes the next element (or returns
Noneto signal the end of the collection)- returns
a collection that produces elements using
funtilfreturnsNone
- Definition Classes
- IterableFactory
final def wait(): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
final def wait(arg0: Long, arg1: Int): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
final def wait(arg0: Long): Unit
object Empty extends AbstractView[Nothing] with Product with Serializable
The empty view
- Annotations
- @SerialVersionUID()
object Filter extends java.io.Serializable
© 2002-2019 EPFL, with contributions from Lightbend.
Licensed under the Apache License, Version 2.0.
https://www.scala-lang.org/api/2.13.0/scala/collection/View$.html
This object reifies operations on views as case classes