scala

class ::

[source: scala/::.scala]

case final class ::[B](private hd : B, val tl : List[B])
extends List[B] with Product
A non empty list characterized by a head and a tail.
Author
Martin Odersky
Version
1.0, 15/07/2003
Method Summary
override def equals (arg0 : Any) : Boolean
override def hashCode : Int
def head : B
Returns this first element of the list.
override def isEmpty : Boolean
Returns true if the list does not contain any elements.
override def productArity : Int
return k for a product A(x_1,...,x_k)
override def productElement (arg0 : Int) : Any
for a product A(x_1,...,x_k), returns x_(n+1) for 0 <= n < k
override def productPrefix : java.lang.String
By default the empty string. Implementations may override this method in order to prepend a string prefix to the result of the toString methods.
def tail : List[B]
Returns this list without its first element.
Methods inherited from List
lengthCompare, ::, +, :::, ++, reverse_:::, length, indices, elements, toList, init, last, take, slice, drop, takeRight, dropRight, splitAt, takeWhile, dropWhile, span, break, apply, map, reverseMap, foreach, filter, remove, partition, sort, count, forall, exists, find, foldLeft, foldRight, reduceLeft, reduceRight, flatMap, reverse, zip, zipWithIndex, zipAll, union, diff, --, -, flatten, intersect, removeDuplicates, stringPrefix, projection, toStream
Methods inherited from Seq
size, concat, lastOption, first, firstOption, headOption, isDefinedAt, lastIndexOf, slice, contains, subseq, toArray, toSeq, equalsWith, startsWith, endsWith, indexOf, containsSlice
Methods inherited from Collection
toString
Methods inherited from Iterable
findIndexOf, indexOf, /:, :\, copyToBuffer, sameElements, mkString, mkString, mkString, addString, addString, copyToArray, hasDefiniteSize
Methods inherited from PartialFunction
orElse, andThen
Methods inherited from Function1
compose
Methods inherited from AnyRef
getClass, clone, notify, notifyAll, wait, wait, wait, finalize, ==, !=, eq, ne, synchronized
Methods inherited from Any
==, !=, isInstanceOf, asInstanceOf
Method Details
def head : B
Returns this first element of the list.
Returns
the first element of this list.
Throws
Predef.NoSuchElementException - if the list is empty.
Overrides
List.head

def tail : List[B]
Returns this list without its first element.
Returns
this list without its first element.
Throws
Predef.NoSuchElementException - if the list is empty.
Overrides
List.tail

override def isEmpty : Boolean
Returns true if the list does not contain any elements.
Returns
true, iff the list is empty.
Overrides
List.isEmpty

override def hashCode : Int

override def equals(arg0 : Any) : Boolean

override def productPrefix : java.lang.String
By default the empty string. Implementations may override this method in order to prepend a string prefix to the result of the toString methods.
Overrides
Product.productPrefix

override def productArity : Int
return k for a product A(x_1,...,x_k)
Overrides
Product.productArity

override def productElement(arg0 : Int) : Any
for a product A(x_1,...,x_k), returns x_(n+1) for 0 <= n < k
Parameters
n - the index of the element to return
Throws
IndexOutOfBoundsException -
Returns
The element n elements after the first element
Overrides
Product.productElement