in scala
trait Seq

`abstract trait` Seq [+A]
  `extends` java.lang.Object
  `with` scala.PartialFunction[scala.Int, A]
  `with` scala.Iterable[A]
  `with` scala.ScalaObject

  Class `Seq[A]` represents finite sequences of elements of type `A`.

Author:
  Martin Odersky
Author:
  Matthias Zenger
Version:
  1.0, 16/07/2003

Direct Known Subclasses:
  NodeSeq, RichString, BoxedArray, SingleLinkedList, ResizableArray, MutableList, Buffer, MutableSeq, Stack, Queue, Stream, SeqProxy, List, Array

Def Summary
`override` | `def` ++ [B >: A] (that: scala.Iterable[B]) : scala.Seq[B] Appends two iterable objects.
`override` | `def` concat [B >: A] (that: scala.Iterable[B]) : scala.Seq[B] Appends two iterable objects.
| `def` contains (elem: scala.Any) : scala.Boolean Tests if the given value `elem` is a member of this sequence.
| `def` copyToArray [B >: A] (xs: scala.Array[B], start: scala.Int) : scala.Unit Fills the given array `xs` with the elements of this sequence starting at position `start`.
`override` | `def` drop (n: scala.Int) : scala.Seq[A] Returns this sequence without its `n` first elements If this sequence has less than `n` elements, the empty sequence is returned.
`override` | `def` dropWhile (p: (A) => scala.Boolean) : scala.Seq[A] Returns the longest suffix of this sequence whose first element does not satisfy the predicate `p`.
`override` | `def` filter (p: (A) => scala.Boolean) : scala.Seq[A] Returns all the elements of this sequence that satisfy the predicate `p`. The order of the elements is preserved.
`override` | `def` flatMap [B] (f: (A) => scala.Iterable[B]) : scala.Seq[B] Applies the given function `f` to each element of this sequence, then concatenates the results.
| `def` isDefinedAt (x: scala.Int) : scala.Boolean Is this partial function defined for the index `x`?
| `def` isEmpty : scala.Boolean Returns true if length == 0
| `def` lastIndexOf [B >: A] (elem: B) : scala.Int Returns the index of the last occurence of the specified element in this sequence, or -1 if the sequence does not contain this element.
`abstract` | `def` length : scala.Int Returns the length of the sequence.
`override` | `def` map [B] (f: (A) => B) : scala.Seq[B] Returns the sequence resulting from applying the given function `f` to each element of this sequence.
| `def` reverse : scala.Seq[A] A sequence consisting of all elements of this sequence in reverse order.
| `def` slice (from: scala.Int, len: scala.Int) : scala.Seq[A] Returns a subsequence starting from index `from` consisting of `len` elements.
`protected` | `def` stringPrefix : java.lang.String Defines the prefix of the string representation.
| `def` subseq (from: scala.Int, end: scala.Int) : scala.Seq[A] Returns a subsequence starting from index `from` consisting of `len` elements.
`override` | `def` take (n: scala.Int) : scala.Seq[A] Returns a sequence consisting only over the first `n` elements of this sequence, or else the whole sequence, if it has less than `n` elements.
`override` | `def` takeWhile (p: (A) => scala.Boolean) : scala.Seq[A] Returns the longest prefix of this sequence whose elements satisfy the predicate `p`.
| `def` toArray [B >: A] : scala.Array[B] Converts this sequence to a fresh Array with `length` elements.
`override` | `def` toString : java.lang.String Customizes the `toString` method.

Def inherited from scala.PartialFunction[scala.Int, A]
andThen , isDefinedAt, orElse

Def inherited from scala.Iterable[A]
++ , /:, :\, addString, concat, copyToBuffer, drop, dropWhile, elements, exists, filter, find, findIndexOf, flatMap, foldLeft, foldRight, forall, foreach, indexOf, map, mkString, mkString, reduceLeft, reduceRight, sameElements, take, takeWhile, toList

Def Detail

`override def` ++ [B >: A](that: scala.Iterable[B]): scala.Seq[B]

  Appends two iterable objects.

Parameters:
  `that -` ..
Returns:
  the new iterable object

@scala.deprecated
`override def` concat [B >: A](that: scala.Iterable[B]): scala.Seq[B]

  Appends two iterable objects.

Returns:
  the new iterable object
Deprecated:
  use `++` instead

`def` contains (elem: scala.Any): scala.Boolean

  Tests if the given value `elem` is a member of this sequence.

Parameters:
  `elem -` element whose membership has to be tested.
Returns:
  `true` iff there is an element of this sequence which is equal (w.r.t. `==`) to `elem`.

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

  Fills the given array `xs` with the elements of this sequence starting at position `start`.

Parameters:
  `xs -` the array to fill.
Parameters:
  `start -` starting index.
Precondition:
  the array must be large enough to hold all elements.

`override def` drop (n: scala.Int): scala.Seq[A]

  Returns this sequence without its `n` first elements If this sequence has less than `n` elements, the empty sequence is returned.

Parameters:
  `n -` the number of elements to drop
Returns:
  the new sequence

`override def` dropWhile (p: (A) => scala.Boolean): scala.Seq[A]

  Returns the longest suffix of this sequence whose first element does not satisfy the predicate `p`.

Parameters:
  `p -` the test predicate.
Returns:
  the longest suffix of the sequence whose first element does not satisfy the predicate `p`.

`override def` filter (p: (A) => scala.Boolean): scala.Seq[A]

  Returns all the elements of this sequence that satisfy the predicate `p`. The order of the elements is preserved.

Parameters:
  `p -` the predicate used to filter the list.
Returns:
  the elements of this list satisfying `p`.

`override def` flatMap [B](f: (A) => scala.Iterable[B]): scala.Seq[B]

  Applies the given function `f` to each element of this sequence, then concatenates the results.

Parameters:
  `f -` the function to apply on each element.
Returns:
  `f(a0) ::: ... ::: f(an)` if this sequence is `a0, ..., an`.

`def` isDefinedAt (x: scala.Int): scala.Boolean

  Is this partial function defined for the index `x`?

Parameters:
  `x -` ..
Returns:
  `true`, iff `x` is a legal sequence index.

`def` isEmpty : scala.Boolean

  Returns true if length == 0

`def` lastIndexOf [B >: A](elem: B): scala.Int

  Returns the index of the last occurence of the specified element in this sequence, or -1 if the sequence does not contain this element.

Parameters:
  `elem -` element to search for.
Returns:
  the index in this sequence of the last occurence of the specified element, or -1 if the sequence does not contain this element.

`abstract def` length : scala.Int

  Returns the length of the sequence.

Returns:
  the sequence length.

`override def` map [B](f: (A) => B): scala.Seq[B]

  Returns the sequence resulting from applying the given function `f` to each element of this sequence.

Parameters:
  `f -` function to apply to each element.
Returns:
  `f(a0), ..., f(an)` if this sequence is `a0, ..., an`.

`def` reverse : scala.Seq[A]

  A sequence consisting of all elements of this sequence in reverse order.

`def` slice (from: scala.Int, len: scala.Int): scala.Seq[A]

  Returns a subsequence starting from index `from` consisting of `len` elements.

Parameters:
  `from -` ..
Parameters:
  `len -` ..
Returns:
  ..

`protected def` stringPrefix : java.lang.String

  Defines the prefix of the string representation.

@scala.deprecated
`def` subseq (from: scala.Int, end: scala.Int): scala.Seq[A]

  Returns a subsequence starting from index `from` consisting of `len` elements.

Deprecated:
  use `slice` instead

`override def` take (n: scala.Int): scala.Seq[A]

  Returns a sequence consisting only over the first `n` elements of this sequence, or else the whole sequence, if it has less than `n` elements.

Parameters:
  `n -` the number of elements to take
Returns:
  the new sequence

`override def` takeWhile (p: (A) => scala.Boolean): scala.Seq[A]

  Returns the longest prefix of this sequence whose elements satisfy the predicate `p`.

Parameters:
  `p -` the test predicate.
Returns:
  the longest prefix of this sequence whose elements satisfy the predicate `p`.

`def` toArray [B >: A]: scala.Array[B]

  Converts this sequence to a fresh Array with `length` elements.

`override def` toString : java.lang.String

  Customizes the `toString` method.

Returns:
  a string representation of this sequence.