gnu.trove

Class TDoubleArrayList

Implemented Interfaces:
Cloneable, Externalizable

public class TDoubleArrayList
extends java.lang.Object
implements Externalizable, Cloneable

A resizable, array-backed list of double primitives. Created: Sat Dec 29 14:21:12 2001
Authors:
Eric D. Friedman
Rob Eden

Field Summary

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

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.
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(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.
void
readExternal(ObjectInput in)
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(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.
TDoubleArrayList
subList(int begin, int end)
Returns a sublist of this list.
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.
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.
void
writeExternal(ObjectOutput out)

Field Details

DEFAULT_CAPACITY

protected static final int DEFAULT_CAPACITY
the default capacity for new lists
Field Value:
10

_data

protected double[] _data
the data of the list

_pos

protected int _pos
the index after the last entry in the list

Constructor Details

TDoubleArrayList

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

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

TDoubleArrayList

public TDoubleArrayList(int capacity)
Creates a new TDoubleArrayList instance with the specified capacity.
Parameters:
capacity - an int value

Method Details

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.

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.

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

clone

public Object clone()
Returns a clone of this list. Since this is a primitive collection, this will be a deep clone.
Returns:
a deep clone of the list.

contains

public boolean contains(double value)
Searches the list for value
Parameters:
value - an double value
Returns:
true if value is in the list.

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

equals

public boolean equals(Object other)
Compares this list to another list, value by value.
Parameters:
other - the object to compare against
Returns:
true if other is a TDoubleArrayList and has exactly the same values.

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

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.

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

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.

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.

hashCode

public int hashCode()

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

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

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.

isEmpty

public boolean isEmpty()
Tests whether this list contains any values.
Returns:
true if the list is empty.

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

max

public double max()
Finds the maximum value in the list.
Returns:
the largest value in the list.

min

public double min()
Finds the minimum value in the list.
Returns:
the smallest value in the list.

readExternal

public void readExternal(ObjectInput in)
            throws IOException,
                   ClassNotFoundException

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

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)

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

set

public void set(int offset,
                double val)
Sets the value at the specified offset.
Parameters:
offset - an int value
val - an double value

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

shuffle

public void shuffle(Random rand)
Shuffle the elements of the list using the specified random number generator.
Parameters:
rand - a Random value

size

public int size()
Returns the number of values in the list.
Returns:
the number of values in the list.

sort

public void sort()
Sort the values in the list (ascending) using the Sun quicksort implementation.
See Also:
java.util.Arrays.sort

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:
java.util.Arrays.sort

subList

public TDoubleArrayList subList(int begin,
                                int end)
Returns a sublist of this list.
Parameters:
begin - low endpoint (inclusive) of the subList.
end - high endpoint (exclusive) of the subList.
Returns:
sublist of this list from begin, inclusive to end, exclusive.

toNativeArray

public double[] toNativeArray()
Copies the contents of the list into a native array.
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.

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

toString

public String toString()
Returns a String representation of the list, front to back.
Returns:
a String value

transformValues

public void transformValues(TDoubleFunction function)
Transform each value in the list using the specified function.
Parameters:
function - a TDoubleFunction value

trimToSize

public void trimToSize()
Sheds any excess capacity above and beyond the current size of the list.

writeExternal

public void writeExternal(ObjectOutput out)
            throws IOException

GNU Trove is copyright B) 2001-2007 Eric D. Friedman. All Rights Reserved.