in scala.collection.mutable
class Queue

[scala.serializable, scala.cloneable]

class Queue [A]
extends java.lang.Object
with scala.collection.mutable.MutableList[A]
with scala.ScalaObject
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
Direct Known Subclasses:
SynchronizedQueue, QueueProxy

Constructor Summary
def this



Def Summary
def ++= (it: scala.Iterator[A]) : scala.Unit
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: scala.Iterable[A]) : scala.Unit
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.
def += (elem: A) : scala.Unit
Inserts a single element at the end of the queue.
def clear : scala.Unit
Removes all elements from the queue. After this operation is completed, the queue will be empty.
override def clone : scala.collection.mutable.Queue[A]
This method clones the queue.
def dequeue : A
Returns the first element in the queue, and removes this element from the queue.
def dequeueAll (p: scala.Function1[A, scala.Boolean]) : scala.Seq[A]
Returns all elements in the queue which satisfy the given predicate, and removes those elements from the queue.
def dequeueFirst (p: scala.Function1[A, scala.Boolean]) : scala.Option[A]
Returns the first element in the queue which satisfies the given predicate, and removes this element from the queue.
def enqueue (elems: A*) : scala.Unit
Adds all elements to the queue.
override def equals (that: scala.Any) : scala.Boolean
Checks if two queues are structurally identical.
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 hashCode : scala.Int
The hashCode method always yields an error, since it is not safe to use mutable queues as keys in hash tables.
override def isEmpty : scala.Boolean
Checks if the queue is empty.
override def toString : java.lang.String
Returns a textual representation of a queue as a string.


Constructor Detail
def this

Def Detail
def ++= (it: scala.Iterator[A]): scala.Unit
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:
it - an iterator

def ++= (iter: scala.Iterable[A]): scala.Unit
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

def += (elem: A): scala.Unit
Inserts a single element at the end of the queue.
Parameters:
elem - the element to insert

def clear : scala.Unit
Removes all elements from the queue. After this operation is completed, the queue will be empty.

override def clone : scala.collection.mutable.Queue[A]
This method clones the queue.
Returns:
a queue with the same elements.

def dequeue : A
Returns the first element in the queue, and removes this element from the queue.
Throws:
scala - .compat.Platform.NoSuchElementException
Returns:
the first element of the queue.

def dequeueAll (p: scala.Function1[A, scala.Boolean]): scala.Seq[A]
Returns all elements in the queue which satisfy the given predicate, and removes those elements from the queue.
Parameters:
p - the predicate used for choosing elements
Returns:
a sequence of all elements in the queue for which p yields true.

def dequeueFirst (p: scala.Function1[A, scala.Boolean]): scala.Option[A]
Returns the first element in the queue which satisfies the given predicate, and removes this element from the queue.
Parameters:
p - the predicate used for choosing the first element
Returns:
the first element of the queue for which p yields true

def enqueue (elems: A*): scala.Unit
Adds all elements to the queue.
Parameters:
elems - the elements to add.

override def equals (that: scala.Any): scala.Boolean
Checks if two queues are structurally identical.
Returns:
true, iff both queues contain the same sequence of elements.

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.

override def hashCode : scala.Int
The hashCode method always yields an error, since it is not safe to use mutable queues as keys in hash tables.
Throws:
scala - .compat.Platform.UnsupportedOperationException
Returns:
never.

override def isEmpty : scala.Boolean
Checks if the queue is empty.
Returns:
true, iff there is no element in the queue.

override def toString : java.lang.String
Returns a textual representation of a queue as a string.
Returns:
the string representation of this queue.