The underlying collection type with unknown element type
A generic implementation of the CanBuildFrom
trait, which forwards all calls to apply(from)
to the genericBuilder
method of collection from
, and which forwards all calls of apply()
to the newBuilder
method of this factory.
Test two objects for inequality.
true
if !(this == that), false otherwise.
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
.
a hash value consistent with ==
The expression x == that
is equivalent to if (x eq null) that eq null else x.equals(that)
.
true
if the receiver object is equivalent to the argument; false
otherwise.
Creates a collection with the specified elements.
the type of the collection's elements
the elements of the created collection
a new collection with elements elems
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.
the receiver object.
ClassCastException
if the receiver object is not an instance of the erasure of type T0
.
The standard CanBuildFrom
instance for Seq
objects. The created value is an instance of class GenericCanBuildFrom
, which forwards calls to create a new builder to the genericBuilder
method of the requesting collection.
Create a copy of the receiver object.
The default implementation of the clone
method is platform dependent.
a copy of the receiver object.
Concatenates all argument collections into a single collection.
the collections that are to be concatenated.
the concatenation of all the collections.
An empty collection of type CC
[A]
the type of the collection's elements
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:
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
).
true
if the argument is a reference to the receiver object; false
otherwise.
The equality method for reference types. Default implementation delegates to eq
.
See also equals
in scala.Any.
true
if the receiver object is equivalent to the argument; false
otherwise.
Produces a five-dimensional collection containing the results of some element computation a number of times.
the number of elements in the 1st dimension
the number of elements in the 2nd dimension
the number of elements in the 3nd dimension
the number of elements in the 4th dimension
the number of elements in the 5th dimension
the element computation
A collection that contains the results of n1 x n2 x n3 x n4 x n5
evaluations of elem
.
Produces a four-dimensional collection containing the results of some element computation a number of times.
the number of elements in the 1st dimension
the number of elements in the 2nd dimension
the number of elements in the 3nd dimension
the number of elements in the 4th dimension
the element computation
A collection that contains the results of n1 x n2 x n3 x n4
evaluations of elem
.
Produces a three-dimensional collection containing the results of some element computation a number of times.
the number of elements in the 1st dimension
the number of elements in the 2nd dimension
the number of elements in the 3nd dimension
the element computation
A collection that contains the results of n1 x n2 x n3
evaluations of elem
.
Produces a two-dimensional collection containing the results of some element computation a number of times.
the number of elements in the 1st dimension
the number of elements in the 2nd dimension
the element computation
A collection that contains the results of n1 x n2
evaluations of elem
.
Produces a collection containing the results of some element computation a number of times.
the number of elements contained in the collection.
the element computation
A collection that contains the results of n
evaluations of elem
.
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.
not specified by SLS as a member of AnyRef
Returns the runtime class representation of the object.
a class object corresponding to the runtime type of the receiver.
The hashCode method for reference types. See hashCode in scala.Any.
the hash code value for this object.
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.
true
if the receiver object is an instance of erasure of type T0
; false
otherwise.
Produces a collection containing repeated applications of a function to a start value.
the start value of the collection
the number of elements contained in the collection
the function that's repeatedly applied
a collection with len
values in the sequence start, f(start), f(f(start)), ...
Equivalent to !(this eq that)
.
true
if the argument is not a reference to the receiver object; false
otherwise.
The default builder for
objects.Seq
the type of the sequence's elements
Wakes up a single thread that is waiting on the receiver object's monitor.
not specified by SLS as a member of AnyRef
Wakes up all threads that are waiting on the receiver object's monitor.
not specified by SLS as a member of AnyRef
Produces a collection containing equally spaced values in some integer interval.
the start value of the collection
the end value of the collection (the first value NOT contained)
the difference between successive elements of the collection (must be positive or negative)
a collection with values start, start + step, ...
up to, but excluding end
Produces a collection containing a sequence of increasing of integers.
the first element of the collection
the end value of the collection (the first value NOT contained)
a collection with values start, start + 1, ..., end - 1
Produces a five-dimensional collection containing values of a given function over ranges of integer values starting from 0.
the number of elements in the 1st dimension
the number of elements in the 2nd dimension
the number of elements in the 3nd dimension
the number of elements in the 4th dimension
the number of elements in the 5th dimension
The function computing element values
A collection consisting of elements f(i1, i2, i3, i4, i5)
for 0 <= i1 < n1
, 0 <= i2 < n2
, 0 <= i3 < n3
, 0 <= i4 < n4
, and 0 <= i5 < n5
.
Produces a four-dimensional collection containing values of a given function over ranges of integer values starting from 0.
the number of elements in the 1st dimension
the number of elements in the 2nd dimension
the number of elements in the 3nd dimension
the number of elements in the 4th dimension
The function computing element values
A collection consisting of elements f(i1, i2, i3, i4)
for 0 <= i1 < n1
, 0 <= i2 < n2
, 0 <= i3 < n3
, and 0 <= i4 < n4
.
Produces a three-dimensional collection containing values of a given function over ranges of integer values starting from 0.
the number of elements in the 1st dimension
the number of elements in the 2nd dimension
the number of elements in the 3nd dimension
The function computing element values
A collection consisting of elements f(i1, i2, i3)
for 0 <= i1 < n1
, 0 <= i2 < n2
, and 0 <= i3 < n3
.
Produces a two-dimensional collection containing values of a given function over ranges of integer values starting from 0.
the number of elements in the 1st dimension
the number of elements in the 2nd dimension
The function computing element values
A collection consisting of elements f(i1, i2)
for 0 <= i1 < n1
and 0 <= i2 < n2
.
Produces a collection containing values of a given function over a range of integer values starting from 0.
The number of elements in the collection
The function computing element values
A collection consisting of elements f(0), ..., f(n -1)
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.
a String representation of the object.
This method is called in a pattern match { case Seq(...) => }.
the selector value
sequence wrapped in an option, if this is a Seq, otherwise none
© 2002-2019 EPFL, with contributions from Lightbend.
Licensed under the Apache License, Version 2.0.
https://www.scala-lang.org/api/2.12.9/scala/collection/Seq$.html
This object provides a set of operations to create
values. The current default implementation of aSeq
Seq
is aList
.