c

de.h2b.scala.lib.coll.adt

HeapPriorityQueue

abstract class HeapPriorityQueue[Key] extends ResizingArrayPriorityQueue[Key]

This abstract class represents a priority queue of generic keys. It supports the usual insert and delete operations, along with methods for peeking at the highest-priority key, testing if the priority queue is empty, and iterating through the keys.

The super trait PriorityQueue supports both minimum and maximum priority-key implementations by means of the ht method.

This implementation uses a binary heap based on a resizing array. Enqueuing and dequeuing operations take logarithmic amortized time. The peek, size, and isEempty operations take constant time.

Adapted from the book Algorithms 4 by R. Sedgewick and K. Wayne.

See also

Section 2.4 of Algorithms, 4th Edition

Algorithms, 4th edition by Robert Sedgewick and Kevin Wayne, Addison-Wesley Professional, 2011, ISBN 0-321-57351-X. http://algs4.cs.princeton.edu

Linear Supertypes
ResizingArrayPriorityQueue[Key], PriorityQueue[Key], Iterable[Key], IterableLike[Key, Iterable[Key]], Equals, GenIterable[Key], GenIterableLike[Key, Iterable[Key]], Traversable[Key], GenTraversable[Key], GenericTraversableTemplate[Key, Iterable], TraversableLike[Key, Iterable[Key]], GenTraversableLike[Key, Iterable[Key]], Parallelizable[Key, ParIterable[Key]], TraversableOnce[Key], GenTraversableOnce[Key], FilterMonadic[Key, Iterable[Key]], HasNewBuilder[Key, Iterable[Key] @scala.annotation.unchecked.uncheckedVariance], AnyRef, Any
Known Subclasses
MaxPqWithHeap, MinPqWithHeap
Ordering
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Inherited
  1. HeapPriorityQueue
  2. ResizingArrayPriorityQueue
  3. PriorityQueue
  4. Iterable
  5. IterableLike
  6. Equals
  7. GenIterable
  8. GenIterableLike
  9. Traversable
  10. GenTraversable
  11. GenericTraversableTemplate
  12. TraversableLike
  13. GenTraversableLike
  14. Parallelizable
  15. TraversableOnce
  16. GenTraversableOnce
  17. FilterMonadic
  18. HasNewBuilder
  19. AnyRef
  20. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new HeapPriorityQueue()(implicit arg0: Ordering[Key], arg1: ClassTag[Key])

Type Members

  1. type Self = Iterable[Key]
    Attributes
    protected[this]
    Definition Classes
    TraversableLike
  2. class WithFilter extends FilterMonadic[A, Repr]
    Definition Classes
    TraversableLike

Abstract Value Members

  1. abstract def ht(a: Key, b: Key)(implicit ord: Ordering[Key]): Boolean

    returns

    a has higher priority than b

    Attributes
    protected
    Definition Classes
    PriorityQueue

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. def ++[B >: Key, That](that: GenTraversableOnce[B])(implicit bf: CanBuildFrom[Iterable[Key], B, That]): That
    Definition Classes
    TraversableLike → GenTraversableLike
  4. def ++:[B >: Key, That](that: Traversable[B])(implicit bf: CanBuildFrom[Iterable[Key], B, That]): That
    Definition Classes
    TraversableLike
  5. def ++:[B >: Key, That](that: TraversableOnce[B])(implicit bf: CanBuildFrom[Iterable[Key], B, That]): That
    Definition Classes
    TraversableLike
  6. def /:[B](z: B)(op: (B, Key) ⇒ B): B
    Definition Classes
    TraversableOnce → GenTraversableOnce
  7. def :\[B](z: B)(op: (Key, B) ⇒ B): B
    Definition Classes
    TraversableOnce → GenTraversableOnce
  8. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  9. var a: Array[Key]
    Attributes
    protected
    Definition Classes
    ResizingArrayPriorityQueue
  10. def addString(b: StringBuilder): StringBuilder
    Definition Classes
    TraversableOnce
  11. def addString(b: StringBuilder, sep: String): StringBuilder
    Definition Classes
    TraversableOnce
  12. def addString(b: StringBuilder, start: String, sep: String, end: String): StringBuilder
    Definition Classes
    TraversableOnce
  13. def aggregate[B](z: ⇒ B)(seqop: (B, Key) ⇒ B, combop: (B, B) ⇒ B): B
    Definition Classes
    TraversableOnce → GenTraversableOnce
  14. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  15. def canEqual(that: Any): Boolean
    Definition Classes
    IterableLike → Equals
  16. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  17. def collect[B, That](pf: PartialFunction[Key, B])(implicit bf: CanBuildFrom[Iterable[Key], B, That]): That
    Definition Classes
    TraversableLike → GenTraversableLike
  18. def collectFirst[B](pf: PartialFunction[Key, B]): Option[B]
    Definition Classes
    TraversableOnce
  19. def companion: GenericCompanion[Iterable]
    Definition Classes
    Iterable → GenIterable → Traversable → GenTraversable → GenericTraversableTemplate
  20. def copyToArray[B >: Key](xs: Array[B], start: Int, len: Int): Unit
    Definition Classes
    IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce
  21. def copyToArray[B >: Key](xs: Array[B]): Unit
    Definition Classes
    TraversableOnce → GenTraversableOnce
  22. def copyToArray[B >: Key](xs: Array[B], start: Int): Unit
    Definition Classes
    TraversableOnce → GenTraversableOnce
  23. def copyToBuffer[B >: Key](dest: Buffer[B]): Unit
    Definition Classes
    TraversableOnce
  24. def count(p: (Key) ⇒ Boolean): Int
    Definition Classes
    TraversableOnce → GenTraversableOnce
  25. def dequeue(): Key

    Removes and returns the item with highest priority from this queue.

    Removes and returns the item with highest priority from this queue.

    returns

    the highest-priority item from this queue

    Definition Classes
    HeapPriorityQueue → PriorityQueue
    Exceptions thrown

    NoSuchElementException if this priority queue is empty

  26. def drop(n: Int): Iterable[Key]
    Definition Classes
    IterableLike → TraversableLike → GenTraversableLike
  27. def dropRight(n: Int): Iterable[Key]
    Definition Classes
    IterableLike
  28. def dropWhile(p: (Key) ⇒ Boolean): Iterable[Key]
    Definition Classes
    TraversableLike → GenTraversableLike
  29. def enqueue(item: Key): Unit
    Definition Classes
    HeapPriorityQueue → PriorityQueue
  30. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  31. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  32. def exists(p: (Key) ⇒ Boolean): Boolean
    Definition Classes
    IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce
  33. def filter(p: (Key) ⇒ Boolean): Iterable[Key]
    Definition Classes
    TraversableLike → GenTraversableLike
  34. def filterNot(p: (Key) ⇒ Boolean): Iterable[Key]
    Definition Classes
    TraversableLike → GenTraversableLike
  35. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  36. def find(p: (Key) ⇒ Boolean): Option[Key]
    Definition Classes
    IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce
  37. def flatMap[B, That](f: (Key) ⇒ GenTraversableOnce[B])(implicit bf: CanBuildFrom[Iterable[Key], B, That]): That
    Definition Classes
    TraversableLike → GenTraversableLike → FilterMonadic
  38. def flatten[B](implicit asTraversable: (Key) ⇒ GenTraversableOnce[B]): Iterable[B]
    Definition Classes
    GenericTraversableTemplate
  39. def fold[A1 >: Key](z: A1)(op: (A1, A1) ⇒ A1): A1
    Definition Classes
    TraversableOnce → GenTraversableOnce
  40. def foldLeft[B](z: B)(op: (B, Key) ⇒ B): B
    Definition Classes
    TraversableOnce → GenTraversableOnce
  41. def foldRight[B](z: B)(op: (Key, B) ⇒ B): B
    Definition Classes
    IterableLike → TraversableOnce → GenTraversableOnce
  42. def forall(p: (Key) ⇒ Boolean): Boolean
    Definition Classes
    IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce
  43. def foreach[U](f: (Key) ⇒ U): Unit
    Definition Classes
    IterableLike → TraversableLike → GenTraversableLike → TraversableOnce → GenTraversableOnce → FilterMonadic
  44. def genericBuilder[B]: Builder[B, Iterable[B]]
    Definition Classes
    GenericTraversableTemplate
  45. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
  46. def groupBy[K](f: (Key) ⇒ K): Map[K, Iterable[Key]]
    Definition Classes
    TraversableLike → GenTraversableLike
  47. def grouped(size: Int): Iterator[Iterable[Key]]
    Definition Classes
    IterableLike
  48. def hasDefiniteSize: Boolean
    Definition Classes
    TraversableLike → TraversableOnce → GenTraversableOnce
  49. def hashCode(): Int
    Definition Classes
    AnyRef → Any
  50. def head: Key
    Definition Classes
    IterableLike → TraversableLike → GenTraversableLike
  51. def headOption: Option[Key]
    Definition Classes
    TraversableLike → GenTraversableLike
  52. def init: Iterable[Key]
    Definition Classes
    TraversableLike → GenTraversableLike
  53. def inits: Iterator[Iterable[Key]]
    Definition Classes
    TraversableLike
  54. def isEmpty: Boolean
    Definition Classes
    PriorityQueue → IterableLike → GenericTraversableTemplate → TraversableLike → TraversableOnce → GenTraversableOnce
  55. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  56. final def isTraversableAgain: Boolean
    Definition Classes
    TraversableLike → GenTraversableLike → GenTraversableOnce
  57. def iterator: Iterator[Key]

    Returns an iterator that iterates over the items in this queue in FIFO order with (!) consuming them.

    Returns an iterator that iterates over the items in this queue in FIFO order with (!) consuming them. .

    returns

    the iterator

    Definition Classes
    PriorityQueue → IterableLike → GenIterableLike
  58. def last: Key
    Definition Classes
    TraversableLike → GenTraversableLike
  59. def lastOption: Option[Key]
    Definition Classes
    TraversableLike → GenTraversableLike
  60. def map[B, That](f: (Key) ⇒ B)(implicit bf: CanBuildFrom[Iterable[Key], B, That]): That
    Definition Classes
    TraversableLike → GenTraversableLike → FilterMonadic
  61. def max[B >: Key](implicit cmp: Ordering[B]): Key
    Definition Classes
    TraversableOnce → GenTraversableOnce
  62. def maxBy[B](f: (Key) ⇒ B)(implicit cmp: Ordering[B]): Key
    Definition Classes
    TraversableOnce → GenTraversableOnce
  63. def min[B >: Key](implicit cmp: Ordering[B]): Key
    Definition Classes
    TraversableOnce → GenTraversableOnce
  64. def minBy[B](f: (Key) ⇒ B)(implicit cmp: Ordering[B]): Key
    Definition Classes
    TraversableOnce → GenTraversableOnce
  65. def mkString: String
    Definition Classes
    TraversableOnce → GenTraversableOnce
  66. def mkString(sep: String): String
    Definition Classes
    TraversableOnce → GenTraversableOnce
  67. def mkString(start: String, sep: String, end: String): String
    Definition Classes
    TraversableOnce → GenTraversableOnce
  68. var n: Int
    Attributes
    protected
    Definition Classes
    ResizingArrayPriorityQueue
  69. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  70. def newBuilder: Builder[Key, Iterable[Key]]
    Attributes
    protected[this]
    Definition Classes
    GenericTraversableTemplate → HasNewBuilder
  71. def nonEmpty: Boolean
    Definition Classes
    TraversableOnce → GenTraversableOnce
  72. final def notify(): Unit
    Definition Classes
    AnyRef
  73. final def notifyAll(): Unit
    Definition Classes
    AnyRef
  74. def par: ParIterable[Key]
    Definition Classes
    Parallelizable
  75. def parCombiner: Combiner[Key, ParIterable[Key]]
    Attributes
    protected[this]
    Definition Classes
    TraversableLike → Parallelizable
  76. def partition(p: (Key) ⇒ Boolean): (Iterable[Key], Iterable[Key])
    Definition Classes
    TraversableLike → GenTraversableLike
  77. def peek: Key

    Returns the item with highest priority from this queue without consuming it.

    Returns the item with highest priority from this queue without consuming it.

    returns

    the highest-priority item from this queue

    Definition Classes
    HeapPriorityQueue → PriorityQueue
    Exceptions thrown

    NoSuchElementException if this priority queue is empty

  78. def product[B >: Key](implicit num: Numeric[B]): B
    Definition Classes
    TraversableOnce → GenTraversableOnce
  79. def reduce[A1 >: Key](op: (A1, A1) ⇒ A1): A1
    Definition Classes
    TraversableOnce → GenTraversableOnce
  80. def reduceLeft[B >: Key](op: (B, Key) ⇒ B): B
    Definition Classes
    TraversableOnce
  81. def reduceLeftOption[B >: Key](op: (B, Key) ⇒ B): Option[B]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  82. def reduceOption[A1 >: Key](op: (A1, A1) ⇒ A1): Option[A1]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  83. def reduceRight[B >: Key](op: (Key, B) ⇒ B): B
    Definition Classes
    IterableLike → TraversableOnce → GenTraversableOnce
  84. def reduceRightOption[B >: Key](op: (Key, B) ⇒ B): Option[B]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  85. def repr: Iterable[Key]
    Definition Classes
    TraversableLike → GenTraversableLike
  86. def resize(capacity: Int): Unit
    Attributes
    protected
    Definition Classes
    HeapPriorityQueue → ResizingArrayPriorityQueue
  87. def reversed: List[Key]
    Attributes
    protected[this]
    Definition Classes
    TraversableOnce
  88. def sameElements[B >: Key](that: GenIterable[B]): Boolean
    Definition Classes
    IterableLike → GenIterableLike
  89. def scan[B >: Key, That](z: B)(op: (B, B) ⇒ B)(implicit cbf: CanBuildFrom[Iterable[Key], B, That]): That
    Definition Classes
    TraversableLike → GenTraversableLike
  90. def scanLeft[B, That](z: B)(op: (B, Key) ⇒ B)(implicit bf: CanBuildFrom[Iterable[Key], B, That]): That
    Definition Classes
    TraversableLike → GenTraversableLike
  91. def scanRight[B, That](z: B)(op: (Key, B) ⇒ B)(implicit bf: CanBuildFrom[Iterable[Key], B, That]): That
    Definition Classes
    TraversableLike → GenTraversableLike
    Annotations
    @migration
    Migration

    (Changed in version 2.9.0) The behavior of scanRight has changed. The previous behavior can be reproduced with scanRight.reverse.

  92. def seq: Iterable[Key]
    Definition Classes
    Iterable → GenIterable → Traversable → GenTraversable → Parallelizable → TraversableOnce → GenTraversableOnce
  93. def size: Int
    Definition Classes
    ResizingArrayPriorityQueue → PriorityQueue → GenTraversableLike → TraversableOnce → GenTraversableOnce
  94. def sizeHintIfCheap: Int
    Attributes
    protected[scala.collection]
    Definition Classes
    GenTraversableOnce
  95. def slice(from: Int, until: Int): Iterable[Key]
    Definition Classes
    IterableLike → TraversableLike → GenTraversableLike
  96. def sliding(size: Int, step: Int): Iterator[Iterable[Key]]
    Definition Classes
    IterableLike
  97. def sliding(size: Int): Iterator[Iterable[Key]]
    Definition Classes
    IterableLike
  98. def span(p: (Key) ⇒ Boolean): (Iterable[Key], Iterable[Key])
    Definition Classes
    TraversableLike → GenTraversableLike
  99. def splitAt(n: Int): (Iterable[Key], Iterable[Key])
    Definition Classes
    TraversableLike → GenTraversableLike
  100. def stringPrefix: String
    Definition Classes
    TraversableLike → GenTraversableLike
  101. def sum[B >: Key](implicit num: Numeric[B]): B
    Definition Classes
    TraversableOnce → GenTraversableOnce
  102. def swap(i: Int, j: Int): Unit

    Swaps ai and aj.

    Swaps ai and aj.

    Attributes
    protected
    Definition Classes
    ResizingArrayPriorityQueue
  103. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  104. def tail: Iterable[Key]
    Definition Classes
    TraversableLike → GenTraversableLike
  105. def tails: Iterator[Iterable[Key]]
    Definition Classes
    TraversableLike
  106. def take(n: Int): Iterable[Key]
    Definition Classes
    IterableLike → TraversableLike → GenTraversableLike
  107. def takeRight(n: Int): Iterable[Key]
    Definition Classes
    IterableLike
  108. def takeWhile(p: (Key) ⇒ Boolean): Iterable[Key]
    Definition Classes
    IterableLike → TraversableLike → GenTraversableLike
  109. def thisCollection: Iterable[Key]
    Attributes
    protected[this]
    Definition Classes
    IterableLike → TraversableLike
  110. def to[Col[_]](implicit cbf: CanBuildFrom[Nothing, Key, Col[Key]]): Col[Key]
    Definition Classes
    TraversableLike → TraversableOnce → GenTraversableOnce
  111. def toArray[B >: Key](implicit arg0: ClassTag[B]): Array[B]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  112. def toBuffer[B >: Key]: Buffer[B]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  113. def toCollection(repr: Iterable[Key]): Iterable[Key]
    Attributes
    protected[this]
    Definition Classes
    IterableLike → TraversableLike
  114. def toIndexedSeq: IndexedSeq[Key]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  115. def toIterable: Iterable[Key]
    Definition Classes
    IterableLike → TraversableOnce → GenTraversableOnce
  116. def toIterator: Iterator[Key]
    Definition Classes
    IterableLike → TraversableLike → GenTraversableOnce
    Annotations
    @deprecatedOverriding( ... , "2.11.0" )
  117. def toList: List[Key]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  118. def toMap[T, U](implicit ev: <:<[Key, (T, U)]): Map[T, U]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  119. def toSeq: Seq[Key]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  120. def toSet[B >: Key]: Set[B]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  121. def toStream: Stream[Key]
    Definition Classes
    IterableLike → TraversableLike → GenTraversableOnce
  122. def toString(): String
    Definition Classes
    HeapPriorityQueue → ResizingArrayPriorityQueue → PriorityQueue → TraversableLike → AnyRef → Any
  123. def toTraversable: Traversable[Key]
    Definition Classes
    TraversableLike → TraversableOnce → GenTraversableOnce
    Annotations
    @deprecatedOverriding( ... , "2.11.0" )
  124. def toVector: Vector[Key]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  125. def transpose[B](implicit asTraversable: (Key) ⇒ GenTraversableOnce[B]): Iterable[Iterable[B]]
    Definition Classes
    GenericTraversableTemplate
    Annotations
    @migration
    Migration

    (Changed in version 2.9.0) transpose throws an IllegalArgumentException if collections are not uniformly sized.

  126. def unzip[A1, A2](implicit asPair: (Key) ⇒ (A1, A2)): (Iterable[A1], Iterable[A2])
    Definition Classes
    GenericTraversableTemplate
  127. def unzip3[A1, A2, A3](implicit asTriple: (Key) ⇒ (A1, A2, A3)): (Iterable[A1], Iterable[A2], Iterable[A3])
    Definition Classes
    GenericTraversableTemplate
  128. def view(from: Int, until: Int): IterableView[Key, Iterable[Key]]
    Definition Classes
    IterableLike → TraversableLike
  129. def view: IterableView[Key, Iterable[Key]]
    Definition Classes
    IterableLike → TraversableLike
  130. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  131. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  132. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  133. def withFilter(p: (Key) ⇒ Boolean): FilterMonadic[Key, Iterable[Key]]
    Definition Classes
    TraversableLike → FilterMonadic
  134. def zip[A1 >: Key, B, That](that: GenIterable[B])(implicit bf: CanBuildFrom[Iterable[Key], (A1, B), That]): That
    Definition Classes
    IterableLike → GenIterableLike
  135. def zipAll[B, A1 >: Key, That](that: GenIterable[B], thisElem: A1, thatElem: B)(implicit bf: CanBuildFrom[Iterable[Key], (A1, B), That]): That
    Definition Classes
    IterableLike → GenIterableLike
  136. def zipWithIndex[A1 >: Key, That](implicit bf: CanBuildFrom[Iterable[Key], (A1, Int), That]): That
    Definition Classes
    IterableLike → GenIterableLike

Inherited from ResizingArrayPriorityQueue[Key]

Inherited from PriorityQueue[Key]

Inherited from Iterable[Key]

Inherited from IterableLike[Key, Iterable[Key]]

Inherited from Equals

Inherited from GenIterable[Key]

Inherited from GenIterableLike[Key, Iterable[Key]]

Inherited from Traversable[Key]

Inherited from GenTraversable[Key]

Inherited from GenericTraversableTemplate[Key, Iterable]

Inherited from TraversableLike[Key, Iterable[Key]]

Inherited from GenTraversableLike[Key, Iterable[Key]]

Inherited from Parallelizable[Key, ParIterable[Key]]

Inherited from TraversableOnce[Key]

Inherited from GenTraversableOnce[Key]

Inherited from FilterMonadic[Key, Iterable[Key]]

Inherited from HasNewBuilder[Key, Iterable[Key] @scala.annotation.unchecked.uncheckedVariance]

Inherited from AnyRef

Inherited from Any

Ungrouped