gnu.trove
Class TDoubleArrayList

java.lang.Object
  |
  +--gnu.trove.TDoubleArrayList

All Implemented Interfaces:

java.lang.Cloneable, java.io.Serializable

public class TDoubleArrayList

extends java.lang.Object

implements java.io.Serializable, java.lang.Cloneable

A resizable, array-backed list of double primitives. Created: Sat Dec 29 14:21:12 2001

Version:

$Id: TDoubleArrayList.java,v 1.15 2003/11/09 09:22:22 ericdf Exp $

Author:

Eric D. Friedman

See Also:

Serialized Form

Field Summary

protected double[]	_data the data of the list
protected int	_pos the index after the last entry in the list
protected static int	DEFAULT_CAPACITY the default capacity for new lists

Constructor Summary

TDoubleArrayList()
Creates a new TDoubleArrayList instance with the default capacity.

TDoubleArrayList(double[] values)
Creates a new TDoubleArrayList instance whose capacity is the greater of the length of values and DEFAULT_CAPACITY and whose initial contents are the specified values.

TDoubleArrayList(int capacity)
Creates a new TDoubleArrayList instance with the specified capacity.

Method Summary

void	add(double val) Adds val to the end of the list, growing as needed.
void	add(double[] vals) Adds the values in the array vals to the end of the list, in order.
void	add(double[] vals, int offset, int length) Adds a subset of the values in the array vals to the end of the list, in order.
int	binarySearch(double value) Performs a binary search for value in the entire list.
int	binarySearch(double value, int fromIndex, int toIndex) Performs a binary search for value in the specified range.
void	clear() Flushes the internal state of the list, resetting the capacity to the default.
void	clear(int capacity) Flushes the internal state of the list, setting the capacity of the empty list to capacity.
java.lang.Object	clone() Returns a clone of this list.
boolean	contains(double value) Searches the list for value
void	ensureCapacity(int capacity) Grow the internal array as needed to accomodate the specified number of elements.
boolean	equals(java.lang.Object other) Compares this list to another list, value by value.
void	fill(double val) Fills every slot in the list with the specified value.
void	fill(int fromIndex, int toIndex, double val) Fills a range in the list with the specified value.
boolean	forEach(TDoubleProcedure procedure) Applies the procedure to each value in the list in ascending (front to back) order.
boolean	forEachDescending(TDoubleProcedure procedure) Applies the procedure to each value in the list in descending (back to front) order.
double	get(int offset) Returns the value at the specified offset.
double	getQuick(int offset) Returns the value at the specified offset without doing any bounds checking.
double	getSet(int offset, double val) Sets the value at the specified offset and returns the previously stored value.
TDoubleArrayList	grep(TDoubleProcedure condition) Searches the list for values satisfying condition in the manner of the *nix grep utility.
int	hashCode()
int	indexOf(double value) Searches the list front to back for the index of value.
int	indexOf(int offset, double value) Searches the list front to back for the index of value, starting at offset.
void	insert(int offset, double value) Inserts value into the list at offset.
void	insert(int offset, double[] values) Inserts the array of values into the list at offset.
void	insert(int offset, double[] values, int valOffset, int len) Inserts a slice of the array of values into the list at offset.
TDoubleArrayList	inverseGrep(TDoubleProcedure condition) Searches the list for values which do not satisfy condition.
boolean	isEmpty() Tests whether this list contains any values.
int	lastIndexOf(double value) Searches the list back to front for the last index of value.
int	lastIndexOf(int offset, double value) Searches the list back to front for the last index of value, starting at offset.
double	max() Finds the maximum value in the list.
double	min() Finds the minimum value in the list.
double	remove(int offset) Removes the value at offset from the list.
void	remove(int offset, int length) Removes length values from the list, starting at offset
void	reset() Sets the size of the list to 0, but does not change its capacity.
void	resetQuick() Sets the size of the list to 0, but does not change its capacity.
void	reverse() Reverse the order of the elements in the list.
void	reverse(int from, int to) Reverse the order of the elements in the range of the list.
void	set(int offset, double val) Sets the value at the specified offset.
void	set(int offset, double[] values) Replace the values in the list starting at offset with the contents of the values array.
void	set(int offset, double[] values, int valOffset, int length) Replace the values in the list starting at offset with length values from the values array, starting at valOffset.
void	setQuick(int offset, double val) Sets the value at the specified offset without doing any bounds checking.
void	shuffle(java.util.Random rand) Shuffle the elements of the list using the specified random number generator.
int	size() Returns the number of values in the list.
void	sort() Sort the values in the list (ascending) using the Sun quicksort implementation.
void	sort(int fromIndex, int toIndex) Sort a slice of the list (ascending) using the Sun quicksort implementation.
double[]	toNativeArray() Copies the contents of the list into a native array.
void	toNativeArray(double[] dest, int offset, int len) Copies a slice of the list into a native array.
double[]	toNativeArray(int offset, int len) Copies a slice of the list into a native array.
java.lang.String	toString() Returns a String representation of the list, front to back.
void	transformValues(TDoubleFunction function) Transform each value in the list using the specified function.
void	trimToSize() Sheds any excess capacity above and beyond the current size of the list.

Methods inherited from class java.lang.Object

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

Field Detail

_data

protected double[] _data

the data of the list

_pos

protected int _pos

the index after the last entry in the list

DEFAULT_CAPACITY

protected static final int DEFAULT_CAPACITY

the default capacity for new lists

See Also:

Constant Field Values

Constructor Detail

TDoubleArrayList

public TDoubleArrayList()

Creates a new TDoubleArrayList instance with the default capacity.

TDoubleArrayList

public TDoubleArrayList(int capacity)

Creates a new TDoubleArrayList instance with the specified capacity.

Parameters:

capacity - an int value

TDoubleArrayList

public TDoubleArrayList(double[] values)

Creates a new TDoubleArrayList instance whose capacity is the greater of the length of values and DEFAULT_CAPACITY and whose initial contents are the specified values.

Parameters:

values - an double[] value

Method Detail

ensureCapacity

public void ensureCapacity(int capacity)

Grow the internal array as needed to accomodate the specified number of elements. The size of the array doubles on each resize unless capacity requires more than twice the current capacity.

Parameters:

capacity - an int value

size

public int size()

Returns the number of values in the list.

Returns:

the number of values in the list.

isEmpty

public boolean isEmpty()

Tests whether this list contains any values.

Returns:

true if the list is empty.

trimToSize

public void trimToSize()

Sheds any excess capacity above and beyond the current size of the list.

add

public void add(double val)

Adds val to the end of the list, growing as needed.

Parameters:

val - an double value

add

public void add(double[] vals)

Adds the values in the array vals to the end of the list, in order.

Parameters:

vals - an double[] value

add

public void add(double[] vals,
                int offset,
                int length)

Adds a subset of the values in the array vals to the end of the list, in order.

Parameters:

vals - an double[] value

offset - the offset at which to start copying

length - the number of values to copy.

insert

public void insert(int offset,
                   double value)

Inserts value into the list at offset. All values including and to the right of offset are shifted to the right.

Parameters:

offset - an int value

value - an double value

insert

public void insert(int offset,
                   double[] values)

Inserts the array of values into the list at offset. All values including and to the right of offset are shifted to the right.

Parameters:

offset - an int value

values - an double[] value

insert

public void insert(int offset,
                   double[] values,
                   int valOffset,
                   int len)

Inserts a slice of the array of values into the list at offset. All values including and to the right of offset are shifted to the right.

Parameters:

offset - an int value

values - an double[] value

valOffset - the offset in the values array at which to start copying.

len - the number of values to copy from the values array

get

public double get(int offset)

Returns the value at the specified offset.

Parameters:

offset - an int value

Returns:

an double value

getQuick

public double getQuick(int offset)

Returns the value at the specified offset without doing any bounds checking.

Parameters:

offset - an int value

Returns:

an double value

set

public void set(int offset,
                double val)

Sets the value at the specified offset.

Parameters:

offset - an int value

val - an double value

getSet

public double getSet(int offset,
                     double val)

Sets the value at the specified offset and returns the previously stored value.

Parameters:

offset - an int value

val - an double value

Returns:

the value previously stored at offset.

set

public void set(int offset,
                double[] values)

Replace the values in the list starting at offset with the contents of the values array.

Parameters:

offset - the first offset to replace

values - the source of the new values

set

public void set(int offset,
                double[] values,
                int valOffset,
                int length)

Replace the values in the list starting at offset with length values from the values array, starting at valOffset.

Parameters:

offset - the first offset to replace

values - the source of the new values

valOffset - the first value to copy from the values array

length - the number of values to copy

setQuick

public void setQuick(int offset,
                     double val)

Sets the value at the specified offset without doing any bounds checking.

Parameters:

offset - an int value

val - an double value

clear

public void clear()

Flushes the internal state of the list, resetting the capacity to the default.

clear

public void clear(int capacity)

Flushes the internal state of the list, setting the capacity of the empty list to capacity.

Parameters:

capacity - an int value

reset

public void reset()

Sets the size of the list to 0, but does not change its capacity. This method can be used as an alternative to the clear method if you want to recyle a list without allocating new backing arrays.

See Also:

clear()

resetQuick

public void resetQuick()

Sets the size of the list to 0, but does not change its capacity. This method can be used as an alternative to the clear method if you want to recyle a list without allocating new backing arrays. This method differs from reset in that it does not clear the old values in the backing array. Thus, it is possible for getQuick to return stale data if this method is used and the caller is careless about bounds checking.

See Also:

reset(), clear(), getQuick(int)

remove

public double remove(int offset)

Removes the value at offset from the list.

Parameters:

offset - an int value

Returns:

the value previously stored at offset.

remove

public void remove(int offset,
                   int length)

Removes length values from the list, starting at offset

Parameters:

offset - an int value

length - an int value

transformValues

public void transformValues(TDoubleFunction function)

Transform each value in the list using the specified function.

Parameters:

function - a TDoubleFunction value

reverse

public void reverse()

Reverse the order of the elements in the list.

reverse

public void reverse(int from,
                    int to)

Reverse the order of the elements in the range of the list.

Parameters:

from - the inclusive index at which to start reversing

to - the exclusive index at which to stop reversing

shuffle

public void shuffle(java.util.Random rand)

Shuffle the elements of the list using the specified random number generator.

Parameters:

rand - a Random value

clone

public java.lang.Object clone()

Returns a clone of this list. Since this is a primitive collection, this will be a deep clone.

Overrides:

clone in class java.lang.Object

Returns:

a deep clone of the list.

toNativeArray

public double[] toNativeArray()

Copies the contents of the list into a native array.

Returns:

an double[] value

toNativeArray

public double[] toNativeArray(int offset,
                              int len)

Copies a slice of the list into a native array.

Parameters:

offset - the offset at which to start copying

len - the number of values to copy.

Returns:

an double[] value

toNativeArray

public void toNativeArray(double[] dest,
                          int offset,
                          int len)

Copies a slice of the list into a native array.

Parameters:

dest - the array to copy into.

offset - the offset of the first value to copy

len - the number of values to copy.

equals

public boolean equals(java.lang.Object other)

Compares this list to another list, value by value.

Overrides:

equals in class java.lang.Object

Parameters:

other - the object to compare against

Returns:

true if other is a TDoubleArrayList and has exactly the same values.

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

forEach

public boolean forEach(TDoubleProcedure procedure)

Applies the procedure to each value in the list in ascending (front to back) order.

Parameters:

procedure - a TDoubleProcedure value

Returns:

true if the procedure did not terminate prematurely.

forEachDescending

public boolean forEachDescending(TDoubleProcedure procedure)

Applies the procedure to each value in the list in descending (back to front) order.

Parameters:

procedure - a TDoubleProcedure value

Returns:

true if the procedure did not terminate prematurely.

sort

public void sort()

Sort the values in the list (ascending) using the Sun quicksort implementation.

See Also:

Arrays.sort(long[])

sort

public void sort(int fromIndex,
                 int toIndex)

Sort a slice of the list (ascending) using the Sun quicksort implementation.

Parameters:

fromIndex - the index at which to start sorting (inclusive)

toIndex - the index at which to stop sorting (exclusive)

See Also:

Arrays.sort(long[])

fill

public void fill(double val)

Fills every slot in the list with the specified value.

Parameters:

val - the value to use when filling

fill

public void fill(int fromIndex,
                 int toIndex,
                 double val)

Fills a range in the list with the specified value.

Parameters:

fromIndex - the offset at which to start filling (inclusive)

toIndex - the offset at which to stop filling (exclusive)

val - the value to use when filling

binarySearch

public int binarySearch(double value)

Performs a binary search for value in the entire list. Note that you must @{link #sort sort} the list before doing a search.

Parameters:

value - the value to search for

Returns:

the absolute offset in the list of the value, or its negative insertion point into the sorted list.

binarySearch

public int binarySearch(double value,
                        int fromIndex,
                        int toIndex)

Performs a binary search for value in the specified range. Note that you must @{link #sort sort} the list or the range before doing a search.

Parameters:

value - the value to search for

fromIndex - the lower boundary of the range (inclusive)

toIndex - the upper boundary of the range (exclusive)

Returns:

the absolute offset in the list of the value, or its negative insertion point into the sorted list.

indexOf

public int indexOf(double value)

Searches the list front to back for the index of value.

Parameters:

value - an double value

Returns:

the first offset of the value, or -1 if it is not in the list.

See Also:

for faster searches on sorted lists

indexOf

public int indexOf(int offset,
                   double value)

Searches the list front to back for the index of value, starting at offset.

Parameters:

offset - the offset at which to start the linear search (inclusive)

value - an double value

Returns:

the first offset of the value, or -1 if it is not in the list.

See Also:

for faster searches on sorted lists

lastIndexOf

public int lastIndexOf(double value)

Searches the list back to front for the last index of value.

Parameters:

value - an double value

Returns:

the last offset of the value, or -1 if it is not in the list.

See Also:

for faster searches on sorted lists

lastIndexOf

public int lastIndexOf(int offset,
                       double value)

Searches the list back to front for the last index of value, starting at offset.

Parameters:

offset - the offset at which to start the linear search (exclusive)

value - an double value

Returns:

the last offset of the value, or -1 if it is not in the list.

See Also:

for faster searches on sorted lists

contains

public boolean contains(double value)

Searches the list for value

Parameters:

value - an double value

Returns:

true if value is in the list.

grep

public TDoubleArrayList grep(TDoubleProcedure condition)

Searches the list for values satisfying condition in the manner of the *nix grep utility.

Parameters:

condition - a condition to apply to each element in the list

Returns:

a list of values which match the condition.

inverseGrep

public TDoubleArrayList inverseGrep(TDoubleProcedure condition)

Searches the list for values which do not satisfy condition. This is akin to *nix grep -v.

Parameters:

condition - a condition to apply to each element in the list

Returns:

a list of values which do not match the condition.

max

public double max()

Finds the maximum value in the list.

Returns:

the largest value in the list.

Throws:

java.lang.IllegalStateException - if the list is empty

min

public double min()

Finds the minimum value in the list.

Returns:

the smallest value in the list.

Throws:

java.lang.IllegalStateException - if the list is empty

toString

public java.lang.String toString()

Returns a String representation of the list, front to back.

Overrides:

toString in class java.lang.Object

Returns:

a String value