Scala Library
scala.collection.mutable

trait QueueProxy
[source: scala/collection/mutable/QueueProxy.scala]
trait QueueProxy[A]
extends Queue[A] with Proxy
Queue objects implement data structures that allow to insert and retrieve elements in a first-in-first-out (FIFO) manner.
Author
Matthias Zenger
Version
1.1, 03/05/2004
Since
1
Values and Variables inherited from MutableList
first0, last0, len
Method Summary
override def ++= (it : Iterator[A]) : QueueProxy[A]
Adds all elements provided by an iterator at the end of the queue. The elements are prepended in the order they are given out by the iterator.
def ++= (iter : Iterable[A]) : QueueProxy[A]
Adds all elements provided by an Iterable object at the end of the queue. The elements are prepended in the order they are given out by the iterator.
override def += (elem : A) : QueueProxy[A]
Inserts a single element at the end of the queue.
override def apply (n : Int) : A
Access element number n.
override def clear : Unit
Removes all elements from the queue. After this operation is completed, the queue will be empty.
override def clone : Queue[A]
This method clones the queue.
override def dequeue : A
Returns the first element in the queue, and removes this element from the queue.
override def enqueue (elems : A*) : Unit
Adds all elements to the queue.
override def front : A
Returns the first element in the queue, or throws an error if there is no element contained in the queue.
override def isEmpty : Boolean
Checks if the queue is empty.
override def iterator : Iterator[A]
Returns an iterator over all elements on the queue.
override def length : Int
Returns the length of this queue.
abstract def self : Queue[A]
Methods inherited from Proxy
hashCode, equals, toString
Methods inherited from Queue
dequeueFirst, dequeueAll, extractFirst
Methods inherited from MutableList
newBuilder, head, tail, update, get, prependElem, appendElem, reset, last, toList, result
Methods inherited from Builder
sizeHint, mapResult
Methods inherited from Growable
+=, ++=
Methods inherited from LinearSeq
companion
Methods inherited from LinearSeqLike
thisCollection, toCollection, foreach, forall, exists, count, find, foldLeft, foldRight, reduceLeft, reduceRight, take, drop, dropRight, slice, takeWhile, span, sameElements, lengthCompare, isDefinedAt, segmentLength, indexWhere, lastIndexWhere
Methods inherited from SeqLike
size, prefixLength, indexWhere, findIndexOf, indexOf, indexOf, lastIndexOf, lastIndexOf, lastIndexWhere, reverse, reverseMap, reverseIterator, reversedElements, startsWith, startsWith, endsWith, indexOfSeq, indexOfSeq, lastIndexOfSeq, lastIndexOfSeq, contains, union, diff, intersect, removeDuplicates, patch, updated, +:, :+, padTo, sortWith, sortWith, sortBy, toSeq, indices, view, view, findLastIndexOf, equalsWith, containsSlice, projection
Methods inherited from PartialFunction
orElse, andThen
Methods inherited from Function1
compose
Methods inherited from IterableLike
elements, toIterable, takeRight, copyToArray, zip, zipAll, zipWithIndex, toStream, canEqual, first, firstOption
Methods inherited from GenericTraversableTemplate
genericBuilder, unzip, flatten, transpose
Methods inherited from TraversableLike
repr, nonEmpty, hasDefiniteSize, ++, ++, map, flatMap, filter, filterNot, partialMap, remove, partition, groupBy, /:, :\, reduceLeftOption, reduceRightOption, sum, product, min, max, headOption, lastOption, init, dropWhile, splitAt, copyToBuffer, copyToArray, toArray, toIndexedSeq, toSet, mkString, mkString, mkString, addString, addString, addString, stringPrefix, withFilter
Methods inherited from AnyRef
getClass, notify, notifyAll, wait, wait, wait, finalize, ==, !=, eq, ne, synchronized
Methods inherited from Any
==, !=, isInstanceOf, asInstanceOf
Method Details
abstract def self : Queue[A]
Overrides
Proxy.self
override def apply(n : Int) : A
Access element number n.
Returns
the element at index n.
override def length : Int
Returns the length of this queue.
override def isEmpty : Boolean
Checks if the queue is empty.
Returns
true, iff there is no element in the queue.
override def +=(elem : A) : QueueProxy[A]
Inserts a single element at the end of the queue.
Parameters
elem - the element to insert
def ++=(iter : Iterable[A]) : QueueProxy[A]
Adds all elements provided by an Iterable object at the end of the queue. The elements are prepended in the order they are given out by the iterator.
Parameters
iter - an iterable object
override def ++=(it : Iterator[A]) : QueueProxy[A]
Adds all elements provided by an iterator at the end of the queue. The elements are prepended in the order they are given out by the iterator.
Parameters
iter - an iterator
override def enqueue(elems : A*) : Unit
Adds all elements to the queue.
Parameters
elems - the elements to add.
Overrides
Queue.enqueue
override def dequeue : A
Returns the first element in the queue, and removes this element from the queue.
Returns
the first element of the queue.
Overrides
Queue.dequeue
override def front : A
Returns the first element in the queue, or throws an error if there is no element contained in the queue.
Returns
the first element.
Overrides
Queue.front
override def clear : Unit
Removes all elements from the queue. After this operation is completed, the queue will be empty.
override def iterator : Iterator[A]
Returns an iterator over all elements on the queue.
Returns
an iterator over all queue elements.
override def clone : Queue[A]
This method clones the queue.
Returns
a queue with the same elements.
Scala Library