Package com.carrotsearch.hppc
Class DoubleArrayList
- java.lang.Object
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- com.carrotsearch.hppc.AbstractDoubleCollection
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- com.carrotsearch.hppc.DoubleArrayList
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- All Implemented Interfaces:
DoubleCollection
,DoubleContainer
,DoubleIndexedContainer
,Preallocable
,java.lang.Cloneable
,java.lang.Iterable<DoubleCursor>
,java.util.RandomAccess
- Direct Known Subclasses:
DoubleStack
@Generated(date="2024-05-16T12:00:00+0000", value="KTypeArrayList.java") public class DoubleArrayList extends AbstractDoubleCollection implements DoubleIndexedContainer, Preallocable, java.lang.Cloneable
An array-backed list of doubles.
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Nested Class Summary
Nested Classes Modifier and Type Class Description (package private) static class
DoubleArrayList.ValueIterator
An iterator implementation foriterator()
.
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Field Summary
Fields Modifier and Type Field Description double[]
buffer
Internal array for storing the list.int
elementsCount
Current number of elements stored inbuffer
.static double[]
EMPTY_ARRAY
An immutable empty buffer (array).protected ArraySizingStrategy
resizer
Buffer resizing strategy.
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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.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods 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).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(java.lang.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 storeexpectedAdditions
.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 anotherDoubleIndexedContainer
.boolean
equals(java.lang.Object obj)
Returnstrue
only if the other object is an instance of the same class and with the same elements.<T extends DoubleProcedure>
TforEach(T procedure)
Applies aprocedure
to all container elements.<T extends DoubleProcedure>
TforEach(T procedure, int fromIndex, int toIndex)
Appliesprocedure
to a slice of the list,fromIndex
, inclusive, totoIndex
, exclusive.static DoubleArrayList
from(double... elements)
Create a list from a variable number of arguments or an array ofdouble
.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 forsize() == 0
.java.util.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.void
release()
Sets the number of stored elements to zero and releases the internal storage array.double
remove(int index)
Removes the element at the specified position in this container and returns it.int
removeAll(double e1)
Removes all occurrences ofe
from this collection.int
removeAll(DoublePredicate predicate)
Removes all elements in this collection for which the given predicate returnstrue
.int
removeFirst(double e1)
Removes the first element that equalse1
, returning its deleted position or-1
if the element was not found.int
removeLast(double e1)
Removes the last element that equalse1
, 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 betweenfromIndex
, inclusive, andtoIndex
, exclusive.void
resize(int newSize)
Truncate or expand the list to the new size.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.double[]
toArray()
Default implementation of copying to an array.void
trimToSize()
Trim the internal buffer to the current size.-
Methods inherited from class com.carrotsearch.hppc.AbstractDoubleCollection
removeAll, retainAll, retainAll, toString
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Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface com.carrotsearch.hppc.DoubleCollection
removeAll, retainAll, retainAll
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Field Detail
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EMPTY_ARRAY
public static final double[] EMPTY_ARRAY
An immutable empty buffer (array).
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buffer
public double[] buffer
Internal array for storing the list. The array may be larger than the current size (size()
).
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elementsCount
public int elementsCount
Current number of elements stored inbuffer
.
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resizer
protected final ArraySizingStrategy resizer
Buffer resizing strategy.
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Constructor Detail
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DoubleArrayList
public DoubleArrayList()
New instance with sane defaults.
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DoubleArrayList
public DoubleArrayList(int expectedElements)
New instance with sane defaults.- Parameters:
expectedElements
- The expected number of elements guaranteed not to cause buffer expansion (inclusive).
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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.
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DoubleArrayList
public DoubleArrayList(DoubleContainer container)
Creates a new list from the elements of another container in its iteration order.
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Method Detail
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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 interfaceDoubleIndexedContainer
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add
public void add(double e1, double e2)
Appends two elements at the end of the list. To add more than two elements, useadd
(vararg-version) or access the buffer directly (tight loop).
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add
public void add(double[] elements, int start, int length)
Add all elements from a range of given array to the list.
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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)
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addAll
public int addAll(DoubleContainer container)
Adds all elements from another container.
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addAll
public int addAll(java.lang.Iterable<? extends DoubleCursor> iterable)
Adds all elements from another iterable.
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insert
public void insert(int index, double e1)
Inserts the specified element at the specified position in this list.- Specified by:
insert
in interfaceDoubleIndexedContainer
- Parameters:
index
- The index at which the element should be inserted, shifting any existing and subsequent elements to the right.
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get
public double get(int index)
- Specified by:
get
in interfaceDoubleIndexedContainer
- Returns:
- Returns the element at index
index
from the list.
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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 interfaceDoubleIndexedContainer
- Returns:
- Returns the previous value in the list.
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remove
public double remove(int index)
Removes the element at the specified position in this container and returns it.- Specified by:
remove
in interfaceDoubleIndexedContainer
- See Also:
DoubleIndexedContainer.removeFirst(double)
,DoubleIndexedContainer.removeLast(double)
,DoubleCollection.removeAll(double)
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removeRange
public void removeRange(int fromIndex, int toIndex)
Removes from this container all of the elements with indexes betweenfromIndex
, inclusive, andtoIndex
, exclusive.- Specified by:
removeRange
in interfaceDoubleIndexedContainer
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removeFirst
public int removeFirst(double e1)
Removes the first element that equalse1
, returning its deleted position or-1
if the element was not found.- Specified by:
removeFirst
in interfaceDoubleIndexedContainer
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removeLast
public int removeLast(double e1)
Removes the last element that equalse1
, returning its deleted position or-1
if the element was not found.- Specified by:
removeLast
in interfaceDoubleIndexedContainer
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removeAll
public int removeAll(double e1)
Removes all occurrences ofe
from this collection.- Specified by:
removeAll
in interfaceDoubleCollection
- Parameters:
e1
- Element to be removed from this collection, if present.- Returns:
- The number of removed elements as a result of this call.
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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 interfaceDoubleContainer
- Returns:
- Returns
true
if this container has an element equal toe
.
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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 interfaceDoubleIndexedContainer
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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 interfaceDoubleIndexedContainer
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isEmpty
public boolean isEmpty()
Shortcut forsize() == 0
.- Specified by:
isEmpty
in interfaceDoubleContainer
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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 interfacePreallocable
- Parameters:
expectedElements
- The total number of elements, inclusive.
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ensureBufferSpace
protected void ensureBufferSpace(int expectedAdditions)
Ensures the internal buffer has enough free slots to storeexpectedAdditions
. Increases internal buffer size if needed.
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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 (usetrimToSize()
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 ornull
values).
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size
public int size()
Return the current number of elements in this container. The time for calculating the container's size may takeO(n)
time, although implementing classes should try to maintain the current size and return in constant time.- Specified by:
size
in interfaceDoubleContainer
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trimToSize
public void trimToSize()
Trim the internal buffer to the current size.
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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 theelementsCount
field to zero.- Specified by:
clear
in interfaceDoubleCollection
- See Also:
DoubleCollection.release()
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release
public void release()
Sets the number of stored elements to zero and releases the internal storage array.- Specified by:
release
in interfaceDoubleCollection
- See Also:
DoubleCollection.clear()
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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 interfaceDoubleContainer
- Overrides:
toArray
in classAbstractDoubleCollection
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clone
public DoubleArrayList clone()
Clone this object. The returned clone will reuse the same hash function and array resizing strategy.- Overrides:
clone
in classjava.lang.Object
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hashCode
public int hashCode()
- Overrides:
hashCode
in classjava.lang.Object
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equals
public boolean equals(java.lang.Object obj)
Returnstrue
only if the other object is an instance of the same class and with the same elements.- Overrides:
equals
in classjava.lang.Object
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equalElements
protected boolean equalElements(DoubleArrayList other)
Compare index-aligned elements against anotherDoubleIndexedContainer
.
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iterator
public java.util.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 interfaceDoubleContainer
- Specified by:
iterator
in interfacejava.lang.Iterable<DoubleCursor>
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forEach
public <T extends DoubleProcedure> T forEach(T procedure)
Applies aprocedure
to all container elements. Returns the argument (any subclass ofDoubleProcedure
. 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 interfaceDoubleContainer
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forEach
public <T extends DoubleProcedure> T forEach(T procedure, int fromIndex, int toIndex)
Appliesprocedure
to a slice of the list,fromIndex
, inclusive, totoIndex
, exclusive.
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removeAll
public int removeAll(DoublePredicate predicate)
Removes all elements in this collection for which the given predicate returnstrue
.- Specified by:
removeAll
in interfaceDoubleCollection
- Returns:
- Returns the number of removed elements.
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forEach
public <T extends DoublePredicate> T forEach(T predicate)
Applies apredicate
to container elements as long, as the predicate returnstrue
. The iteration is interrupted otherwise.- Specified by:
forEach
in interfaceDoubleContainer
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forEach
public <T extends DoublePredicate> T forEach(T predicate, int fromIndex, int toIndex)
Appliespredicate
to a slice of the list,fromIndex
, inclusive, totoIndex
, exclusive, or until predicate returnsfalse
.
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from
public static DoubleArrayList from(double... elements)
Create a list from a variable number of arguments or an array ofdouble
. The elements are copied from the argument to the internal buffer.
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