Module com.carrotsearch.hppc
Package com.carrotsearch.hppc

Class DoubleArrayList

java.lang.Object
com.carrotsearch.hppc.DoubleArrayList
All Implemented Interfaces:
Accountable, DoubleCollection, DoubleContainer, DoubleIndexedContainer, Preallocable, Cloneable, Iterable<DoubleCursor>, RandomAccess
Direct Known Subclasses:
DoubleStack
@Generated(date="2024-06-04T15:20:17+0200", value="KTypeArrayList.java") public class DoubleArrayList extends Object implements DoubleIndexedContainer, Preallocable, Cloneable, Accountable
An array-backed list of doubles.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    double[]
    buffer
    Internal array for storing the list.
    int
    elementsCount
    Current number of elements stored in buffer.
    static final double[]
    EMPTY_ARRAY
    An immutable empty buffer (array).
    protected final ArraySizingStrategy
    resizer
    Buffer resizing strategy.

  • Constructor Summary

    Constructors
    Constructor
    Description
    DoubleArrayList()
    New instance with sane defaults.
    DoubleArrayList(int expectedElements)
    New instance with sane defaults.
    DoubleArrayList(int expectedElements, ArraySizingStrategy resizer)
    New instance with sane defaults.
    DoubleArrayList(DoubleContainer container)
    Creates a new list from the elements of another container in its iteration order.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    add(double e1)
    Adds an element to the end of this container (the last index is incremented by one).
    final void
    add(double... elements)
    Vararg-signature method for adding elements at the end of the list.
    void
    add(double[] elements, int start, int length)
    Add all elements from a range of given array to the list.
    void
    add(double e1, double e2)
    Appends two elements at the end of the list.
    int
    addAll(DoubleContainer container)
    Adds all elements from another container.
    int
    addAll(Iterable<? extends DoubleCursor> iterable)
    Adds all elements from another iterable.
    void
    clear()
    Sets the number of stored elements to zero.
    DoubleArrayList
    clone()
    Clone this object.
    boolean
    contains(double e1)
    Lookup a given element in the container.
    protected void
    ensureBufferSpace(int expectedAdditions)
    Ensures the internal buffer has enough free slots to store expectedAdditions.
    void
    ensureCapacity(int expectedElements)
    Ensure this container can hold at least the given number of elements without resizing its buffers.
    protected boolean
    equalElements(DoubleArrayList other)
    Compare index-aligned elements against another DoubleIndexedContainer.
    boolean
    equals(Object obj)
    Returns true only if the other object is an instance of the same class and with the same elements.
    <T extends DoubleProcedure>
    T
    forEach(T procedure)
    Applies a procedure to all container elements.
    <T extends DoubleProcedure>
    T
    forEach(T procedure, int fromIndex, int toIndex)
    Applies procedure to a slice of the list, fromIndex, inclusive, to toIndex, exclusive.
    static DoubleArrayList
    from(double... elements)
    Create a list from a variable number of arguments or an array of double.
    double
    get(int index)
    int
    hashCode()
    int
    indexOf(double e1)
    Returns the index of the first occurrence of the specified element in this list, or -1 if this list does not contain the element.
    void
    insert(int index, double e1)
    Inserts the specified element at the specified position in this list.
    boolean
    isEmpty()
    Shortcut for size() == 0.
    Iterator<DoubleCursor>
    iterator()
    Returns an iterator to a cursor traversing the collection.
    int
    lastIndexOf(double e1)
    Returns the index of the last occurrence of the specified element in this list, or -1 if this list does not contain the element.
    long
    ramBytesAllocated()
    Allocated memory estimation
    long
    ramBytesUsed()
    Bytes that is actually been used
    void
    release()
    Sets the number of stored elements to zero and releases the internal storage array.
    int
    removeAll(double e1)
    Removes all occurrences of e from this collection.
    int
    removeAll(DoubleLookupContainer c)
    Default implementation uses a predicate for removal.
    int
    removeAll(DoublePredicate predicate)
    Removes all elements in this collection for which the given predicate returns true .
    double
    removeAt(int index)
    Removes the element at the specified position in this container and returns it.
    boolean
    removeElement(double e1)
    Removes the first element that equals e1, returning whether an element has been removed.
    int
    removeFirst(double e1)
    Removes the first element that equals e1, returning its deleted position or -1 if the element was not found.
    double
    removeLast()
    Removes and returns the last element of this container.
    int
    removeLast(double e1)
    Removes the last element that equals e1, returning its deleted position or -1 if the element was not found.
    void
    removeRange(int fromIndex, int toIndex)
    Removes from this container all of the elements with indexes between fromIndex, inclusive, and toIndex, exclusive.
    void
    resize(int newSize)
    Truncate or expand the list to the new size.
    int
    retainAll(DoubleLookupContainer c)
    Default implementation uses a predicate for retaining.
    int
    retainAll(DoublePredicate predicate)
    Default implementation redirects to DoubleCollection.removeAll(DoublePredicate) and negates the predicate.
    DoubleIndexedContainer
    reverse()
    Reverses the elements in this container and returns this container.
    double
    set(int index, double e1)
    Replaces the element at the specified position in this list with the specified element.
    int
    size()
    Return the current number of elements in this container.
    DoubleIndexedContainer
    sort()
    Sorts the elements in this container and returns this container.
    DoubleStream
    stream()
    Returns this container elements as a stream.
    double[]
    toArray()
    Default implementation of copying to an array.
    String
    toString()
    Convert the contents of this container to a human-friendly string.
    void
    trimToSize()
    Trim the internal buffer to the current size.

    Methods inherited from class java.lang.Object

    finalize, getClass, notify, notifyAll, wait, wait, wait

    Methods inherited from interface com.carrotsearch.hppc.DoubleCollection

    removeAll, retainAll, retainAll

    Methods inherited from interface java.lang.Iterable

    forEach, spliterator

  • Field Details

    • EMPTY_ARRAY

      public static final double[] EMPTY_ARRAY
      An immutable empty buffer (array).

    • buffer

      public double[] buffer
      Internal array for storing the list. The array may be larger than the current size (size()).

    • elementsCount

      public int elementsCount
      Current number of elements stored in buffer.

    • resizer

      protected final ArraySizingStrategy resizer
      Buffer resizing strategy.

  • Constructor Details

    • DoubleArrayList

      public DoubleArrayList()
      New instance with sane defaults.

    • DoubleArrayList

      public DoubleArrayList(int expectedElements)
      New instance with sane defaults.
      Parameters:
      expectedElements - The expected number of elements guaranteed not to cause buffer expansion (inclusive).

    • DoubleArrayList

      public DoubleArrayList(int expectedElements, ArraySizingStrategy resizer)
      New instance with sane defaults.
      Parameters:
      expectedElements - The expected number of elements guaranteed not to cause buffer expansion (inclusive).
      resizer - Underlying buffer sizing strategy.

    • DoubleArrayList

      public DoubleArrayList(DoubleContainer container)
      Creates a new list from the elements of another container in its iteration order.

  • Method Details

    • add

      public void add(double e1)
      Adds an element to the end of this container (the last index is incremented by one).
      Specified by:
      add in interface DoubleIndexedContainer

    • add

      public void add(double e1, double e2)
      Appends two elements at the end of the list. To add more than two elements, use add (vararg-version) or access the buffer directly (tight loop).

    • add

      public void add(double[] elements, int start, int length)
      Add all elements from a range of given array to the list.

    • add

      public final void add(double... elements)
      Vararg-signature method for adding elements at the end of the list.

      This method is handy, but costly if used in tight loops (anonymous array passing)

    • addAll

      public int addAll(DoubleContainer container)
      Adds all elements from another container.

    • addAll

      public int addAll(Iterable<? extends DoubleCursor> iterable)
      Adds all elements from another iterable.

    • insert

      public void insert(int index, double e1)
      Inserts the specified element at the specified position in this list.
      Specified by:
      insert in interface DoubleIndexedContainer
      Parameters:
      index - The index at which the element should be inserted, shifting any existing and subsequent elements to the right.

    • get

      public double get(int index)
      Specified by:
      get in interface DoubleIndexedContainer
      Returns:
      Returns the element at index index from the list.

    • set

      public double set(int index, double e1)
      Replaces the element at the specified position in this list with the specified element.
      Specified by:
      set in interface DoubleIndexedContainer
      Returns:
      Returns the previous value in the list.

    • removeAt

      public double removeAt(int index)
      Removes the element at the specified position in this container and returns it.
      Specified by:
      removeAt in interface DoubleIndexedContainer
      See Also:

    • removeLast

      public double removeLast()
      Removes and returns the last element of this container. This container must not be empty.
      Specified by:
      removeLast in interface DoubleIndexedContainer

    • removeRange

      public void removeRange(int fromIndex, int toIndex)
      Removes from this container all of the elements with indexes between fromIndex, inclusive, and toIndex, exclusive.
      Specified by:
      removeRange in interface DoubleIndexedContainer

    • removeElement

      public boolean removeElement(double e1)
      Removes the first element that equals e1, returning whether an element has been removed.
      Specified by:
      removeElement in interface DoubleIndexedContainer

    • removeFirst

      public int removeFirst(double e1)
      Removes the first element that equals e1, returning its deleted position or -1 if the element was not found.
      Specified by:
      removeFirst in interface DoubleIndexedContainer

    • removeLast

      public int removeLast(double e1)
      Removes the last element that equals e1, returning its deleted position or -1 if the element was not found.
      Specified by:
      removeLast in interface DoubleIndexedContainer

    • removeAll

      public int removeAll(double e1)
      Removes all occurrences of e from this collection.
      Specified by:
      removeAll in interface DoubleCollection
      Parameters:
      e1 - Element to be removed from this collection, if present.
      Returns:
      The number of removed elements as a result of this call.

    • contains

      public boolean contains(double e1)
      Lookup a given element in the container. This operation has no speed guarantees (may be linear with respect to the size of this container).
      Specified by:
      contains in interface DoubleContainer
      Returns:
      Returns true if this container has an element equal to e.

    • indexOf

      public int indexOf(double e1)
      Returns the index of the first occurrence of the specified element in this list, or -1 if this list does not contain the element.
      Specified by:
      indexOf in interface DoubleIndexedContainer

    • lastIndexOf

      public int lastIndexOf(double e1)
      Returns the index of the last occurrence of the specified element in this list, or -1 if this list does not contain the element.
      Specified by:
      lastIndexOf in interface DoubleIndexedContainer

    • isEmpty

      public boolean isEmpty()
      Shortcut for size() == 0.
      Specified by:
      isEmpty in interface DoubleContainer

    • ensureCapacity

      public void ensureCapacity(int expectedElements)
      Ensure this container can hold at least the given number of elements without resizing its buffers.
      Specified by:
      ensureCapacity in interface Preallocable
      Parameters:
      expectedElements - The total number of elements, inclusive.

    • ensureBufferSpace

      protected void ensureBufferSpace(int expectedAdditions)
      Ensures the internal buffer has enough free slots to store expectedAdditions. Increases internal buffer size if needed.

    • resize

      public void resize(int newSize)
      Truncate or expand the list to the new size. If the list is truncated, the buffer will not be reallocated (use trimToSize() if you need a truncated buffer), but the truncated values will be reset to the default value (zero). If the list is expanded, the elements beyond the current size are initialized with JVM-defaults (zero or null values).

    • size

      public int size()
      Return the current number of elements in this container. The time for calculating the container's size may take O(n) time, although implementing classes should try to maintain the current size and return in constant time.
      Specified by:
      size in interface DoubleContainer

    • trimToSize

      public void trimToSize()
      Trim the internal buffer to the current size.

    • clear

      public void clear()
      Sets the number of stored elements to zero. Releases and initializes the internal storage array to default values. To clear the list without cleaning the buffer, simply set the elementsCount field to zero.
      Specified by:
      clear in interface DoubleCollection
      See Also:

    • release

      public void release()
      Sets the number of stored elements to zero and releases the internal storage array.
      Specified by:
      release in interface DoubleCollection
      See Also:

    • toArray

      public double[] toArray()
      Default implementation of copying to an array.

      The returned array is sized to match exactly the number of elements of the stack.

      Specified by:
      toArray in interface DoubleContainer

    • stream

      public DoubleStream stream()
      Description copied from interface: DoubleIndexedContainer
      Returns this container elements as a stream.
      Specified by:
      stream in interface DoubleIndexedContainer

    • sort

      public DoubleIndexedContainer sort()
      Sorts the elements in this container and returns this container.
      Specified by:
      sort in interface DoubleIndexedContainer

    • reverse

      public DoubleIndexedContainer reverse()
      Reverses the elements in this container and returns this container.
      Specified by:
      reverse in interface DoubleIndexedContainer

    • clone

      public DoubleArrayList clone()
      Clone this object. The returned clone will reuse the same hash function and array resizing strategy.
      Overrides:
      clone in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • equals

      public boolean equals(Object obj)
      Returns true only if the other object is an instance of the same class and with the same elements.
      Overrides:
      equals in class Object

    • equalElements

      protected boolean equalElements(DoubleArrayList other)
      Compare index-aligned elements against another DoubleIndexedContainer.

    • ramBytesAllocated

      public long ramBytesAllocated()
      Description copied from interface: Accountable
      Allocated memory estimation
      Specified by:
      ramBytesAllocated in interface Accountable
      Returns:
      Ram allocated in bytes

    • ramBytesUsed

      public long ramBytesUsed()
      Description copied from interface: Accountable
      Bytes that is actually been used
      Specified by:
      ramBytesUsed in interface Accountable
      Returns:
      Ram used in bytes

    • iterator

      public Iterator<DoubleCursor> iterator()
      Returns an iterator to a cursor traversing the collection. The order of traversal is not defined. More than one cursor may be active at a time. The behavior of iterators is undefined if structural changes are made to the underlying collection.

      The iterator is implemented as a cursor and it returns the same cursor instance on every call to Iterator.next() (to avoid boxing of primitive types). To read the current list's value (or index in the list) use the cursor's public fields. An example is shown below. 

       for (DoubleCursor<double> c : container) {
   System.out.println("index=" + c.index + " value=" + c.value);
 }
      Specified by:
      iterator in interface DoubleContainer
      Specified by:
      iterator in interface Iterable<DoubleCursor>

    • forEach

      public <T extends DoubleProcedure> T forEach(T procedure)
      Applies a procedure to all container elements. Returns the argument (any subclass of DoubleProcedure. This lets the caller to call methods of the argument by chaining the call (even if the argument is an anonymous type) to retrieve computed values, for example (IntContainer): 
       int count = container.forEach(new IntProcedure() {
   int count; // this is a field declaration in an anonymous class.

   public void apply(int value) {
     count++;
   }
 }).count;
      Specified by:
      forEach in interface DoubleContainer

    • forEach

      public <T extends DoubleProcedure> T forEach(T procedure, int fromIndex, int toIndex)
      Applies procedure to a slice of the list, fromIndex, inclusive, to toIndex, exclusive.

    • removeAll

      public int removeAll(DoublePredicate predicate)
      Removes all elements in this collection for which the given predicate returns true .
      Specified by:
      removeAll in interface DoubleCollection
      Returns:
      Returns the number of removed elements.

    • forEach

      public <T extends DoublePredicate> T forEach(T predicate)
      Applies a predicate to container elements as long, as the predicate returns true. The iteration is interrupted otherwise.
      Specified by:
      forEach in interface DoubleContainer

    • forEach

      public <T extends DoublePredicate> T forEach(T predicate, int fromIndex, int toIndex)
      Applies predicate to a slice of the list, fromIndex, inclusive, to toIndex, exclusive, or until predicate returns false.

    • from

      public static DoubleArrayList from(double... elements)
      Create a list from a variable number of arguments or an array of double. The elements are copied from the argument to the internal buffer.

    • removeAll

      public int removeAll(DoubleLookupContainer c)
      Default implementation uses a predicate for removal.
      Specified by:
      removeAll in interface DoubleCollection
      Returns:
      Returns the number of removed elements.

    • retainAll

      public int retainAll(DoubleLookupContainer c)
      Default implementation uses a predicate for retaining.
      Specified by:
      retainAll in interface DoubleCollection
      Returns:
      Returns the number of removed elements.

    • retainAll

      public int retainAll(DoublePredicate predicate)
      Default implementation redirects to DoubleCollection.removeAll(DoublePredicate) and negates the predicate.
      Specified by:
      retainAll in interface DoubleCollection
      Returns:
      Returns the number of removed elements.

    • toString

      public String toString()
      Convert the contents of this container to a human-friendly string.
      Overrides:
      toString in class Object