smile.math

Class DoubleArrayList

java.lang.Object

smile.math.DoubleArrayList

public final class DoubleArrayList
extends Object

A resizeable, array-backed list of double primitives.

Author:

Haifeng Li

Constructor Summary

Constructors

Constructor and Description
DoubleArrayList() Constructs an empty list.
DoubleArrayList(double[] values) Constructs a list containing the values of the specified array.
DoubleArrayList(int capacity) Constructs an empty list with the specified initial capacity.

Method Summary

Methods

Modifier and Type	Method and Description
void	add(double val) Appends the specified value to the end of this list.
void	add(double[] vals) Appends an array to the end of this list.
void	clear() Removes all of the values from this list.
void	ensureCapacity(int capacity) Increases the capacity, if necessary, to ensure that it can hold at least the number of values specified by the minimum capacity argument.
double	get(int index) Returns the value at the specified position in this list.
boolean	isEmpty() Returns true if this list contains no values.
double	remove(int index) Removes the value at specified index from the list.
void	set(int index, double val) Replaces the value at the specified position in this list with the specified value.
int	size() Returns the number of values in the list.
double[]	toArray() Returns an array containing all of the values in this list in proper sequence (from first to last value).
double[]	toArray(double[] dest) Returns an array containing all of the values in this list in proper sequence (from first to last value).
void	trimToSize() Trims the capacity to be the list's current size.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DoubleArrayList

public DoubleArrayList()

Constructs an empty list.

DoubleArrayList

public DoubleArrayList(int capacity)

Constructs an empty list with the specified initial capacity.

Parameters:

capacity - the initial size of array list.

DoubleArrayList

public DoubleArrayList(double[] values)

Constructs a list containing the values of the specified array.

Parameters:

values - the initial values of array list.

Method Detail

ensureCapacity

public void ensureCapacity(int capacity)

Increases the capacity, if necessary, to ensure that it can hold at least the number of values specified by the minimum capacity argument.

Parameters:

capacity - the desired minimum capacity.

size

public int size()

Returns the number of values in the list.

Returns:

the number of values in the list

isEmpty

public boolean isEmpty()

Returns true if this list contains no values.

Returns:

true if the list is empty

trimToSize

public void trimToSize()

Trims the capacity to be the list's current size.

add

public void add(double val)

Appends the specified value to the end of this list.

Parameters:

val - a value to be appended to this list.

add

public void add(double[] vals)

Appends an array to the end of this list.

Parameters:

vals - an array to be appended to this list.

get

public double get(int index)

Returns the value at the specified position in this list.

Parameters:

index - index of the value to return

Returns:

the value at the specified position in this list

set

public void set(int index,
       double val)

Replaces the value at the specified position in this list with the specified value.

Parameters:

index - index of the value to replace

val - value to be stored at the specified position

Throws:

IndexOutOfBoundsException - if the index is out of range (index < 0 || index >= size())

clear

public void clear()

Removes all of the values from this list. The list will be empty after this call returns.

remove

public double remove(int index)

Removes the value at specified index from the list.

Parameters:

index - index of the value to remove.

Returns:

the value previously stored at specified index

Throws:

IndexOutOfBoundsException - if the index is out of range (index < 0 || index >= size())

toArray

public double[] toArray()

Returns an array containing all of the values in this list in proper sequence (from first to last value). The caller is thus free to modify the returned array.

toArray

public double[] toArray(double[] dest)

Returns an array containing all of the values in this list in proper sequence (from first to last value). If the list fits in the specified array, it is returned therein. Otherwise, a new array is allocated with the size of this list.

Parameters:

dest - the array into which the values of the list are to be stored, if it is big enough; otherwise, a new array is allocated for this purpose.

Returns:

an array containing the values of the list