Scala Library
scala.collection.mutable

class SynchronizedPriorityQueue
[source: scala/collection/mutable/SynchronizedPriorityQueue.scala]
class SynchronizedPriorityQueue[A](implicit ord : Ordering[A])
extends PriorityQueue[A]
This class implements synchronized priority queues using a heap. The elements of the queue have to be ordered in terms of the Ordered[T] class.
Author
Matthias Zenger
Version
1.0, 03/05/2004
Since
1
Method Summary
override def ++= (it : Iterator[A]) : SynchronizedPriorityQueue[A]
Adds all elements provided by an iterator into the priority queue.
def ++= (iter : Iterable[A]) : SynchronizedPriorityQueue[A]
Adds all elements provided by an Iterable object into the priority queue.
override def += (elem : A) : SynchronizedPriorityQueue[A]
Inserts a single element into the priority queue.
override def clear : Unit
Removes all elements from the queue. After this operation is completed, the queue will be empty.
override def dequeue : A
Returns the element with the highest priority in the queue, and removes this element from the queue.
override def enqueue (elems : A*) : Unit
Adds all elements to the queue.
override def equals (that : Any) : Boolean
Checks if two queues are structurally identical.
override def isEmpty : Boolean
Checks if the queue is empty.
override def iterator : Iterator[A]
Returns an iterator which yiels all the elements of the priority queue in descending priority order.
override def max : A
Returns the element with the highest priority in the queue, or throws an error if there is no element contained in the queue.
override def toString : java.lang.String
Returns a textual representation of a queue as a string.
Methods inherited from PriorityQueue
newBuilder, length, size, repr, foreach, update, apply, result, fixUp, fixDown, +, +, ++, ++, reverse, reverseIterator, hashCode, toQueue, toList, clone
Methods inherited from Builder
sizeHint, mapResult
Methods inherited from Growable
+=, ++=
Methods inherited from Seq
companion
Methods inherited from SeqLike
thisCollection, toCollection, lengthCompare, isDefinedAt, segmentLength, prefixLength, indexWhere, indexWhere, findIndexOf, indexOf, indexOf, lastIndexOf, lastIndexOf, lastIndexWhere, lastIndexWhere, reverseMap, 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, forall, exists, find, foldRight, reduceRight, toIterable, head, take, slice, takeWhile, takeRight, dropRight, copyToArray, zip, zipAll, zipWithIndex, sameElements, toStream, canEqual, first, firstOption
Methods inherited from GenericTraversableTemplate
genericBuilder, unzip, flatten, transpose
Methods inherited from TraversableLike
nonEmpty, hasDefiniteSize, ++, ++, map, flatMap, filter, filterNot, partialMap, remove, partition, groupBy, count, foldLeft, /:, :\, reduceLeft, reduceLeftOption, reduceRightOption, sum, product, min, max, headOption, tail, last, lastOption, init, drop, dropWhile, span, 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
override def isEmpty : Boolean
Checks if the queue is empty.
Returns
true, iff there is no element in the queue.
Overrides
PriorityQueue.isEmpty
override def +=(elem : A) : SynchronizedPriorityQueue[A]
Inserts a single element into the priority queue.
Parameters
elem - the element to insert
Overrides
PriorityQueue.+=
def ++=(iter : Iterable[A]) : SynchronizedPriorityQueue[A]
Adds all elements provided by an Iterable object into the priority queue.
Parameters
iter - an iterable object
override def ++=(it : Iterator[A]) : SynchronizedPriorityQueue[A]
Adds all elements provided by an iterator into the priority queue.
Parameters
it - an iterator
override def enqueue(elems : A*) : Unit
Adds all elements to the queue.
Parameters
elems - the elements to add.
Overrides
PriorityQueue.enqueue
override def dequeue : A
Returns the element with the highest priority in the queue, and removes this element from the queue.
Returns
the element with the highest priority.
Overrides
PriorityQueue.dequeue
override def max : A
Returns the element with the highest priority in the queue, or throws an error if there is no element contained in the queue.
Returns
the element with the highest priority.
Overrides
PriorityQueue.max
override def clear : Unit
Removes all elements from the queue. After this operation is completed, the queue will be empty.
Overrides
PriorityQueue.clear
override def iterator : Iterator[A]
Returns an iterator which yiels all the elements of the priority queue in descending priority order.
Returns
an iterator over all elements sorted in descending order.
Overrides
PriorityQueue.iterator
override def equals(that : Any) : Boolean
Checks if two queues are structurally identical.
Returns
true, iff both queues contain the same sequence of elements.
override def toString : java.lang.String
Returns a textual representation of a queue as a string.
Returns
the string representation of this queue.
Overrides
PriorityQueue.toString
Scala Library