Package elki.utilities.datastructures.arrays

Class ArrayUtil

java.lang.Object

elki.utilities.datastructures.arrays.ArrayUtil

public class ArrayUtil
extends java.lang.Object

Utility functions for manipulating arrays.

Since:

0.8.0

Author:

Erich Schubert

Constructor Summary

Constructors

Constructor	Description
ArrayUtil()

Method Summary

Modifier and Type	Method	Description
static void	randomShuffle(byte[] data, java.util.Random random, int limit)	Random shuffle (part) of an array.
static void	randomShuffle(double[] data, java.util.Random random, int limit)	Random shuffle (part) of an array.
static void	randomShuffle(float[] data, java.util.Random random, int limit)	Random shuffle (part) of an array.
static void	randomShuffle(int[] data, java.util.Random random, int limit)	Random shuffle (part) of an array.
static void	randomShuffle(short[] data, java.util.Random random, int limit)	Random shuffle (part) of an array.
static <T> void	randomShuffle(java.util.ArrayList<T> data, java.util.Random random, int limit)	Random shuffle (part) of an array.
static <T> void	randomShuffle(T[] data, java.util.Random random, int limit)	Random shuffle (part) of an array.
static void	swap(byte[] data, int i, int j)	Swap two values in a byte array.
static void	swap(double[] data, int i, int j)	Swap two values in a double array.
static void	swap(float[] data, int i, int j)	Swap two values in a float array.
static void	swap(int[] data, int i, int j)	Swap two values in an integer array.
static void	swap(short[] data, int i, int j)	Swap two values in a short array.
static <T> void	swap(java.util.ArrayList<T> data, int i, int j)	Swap two values in an object array.
static <T> void	swap(T[] data, int i, int j)	Swap two values in an object array.

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayUtil

public ArrayUtil()

Method Detail

swap

public static <T> void swap(java.util.ArrayList<T> data,
                            int i,
                            int j)

Swap two values in an object array.

Type Parameters:

T - Object type

Parameters:

data - Data

i - First position

j - Second position

swap

public static <T> void swap(T[] data,
                            int i,
                            int j)

Swap two values in an object array.

Type Parameters:

T - Object type

Parameters:

data - Data

i - First position

j - Second position

swap

public static void swap(int[] data,
                        int i,
                        int j)

Swap two values in an integer array.

Parameters:

data - Data

i - First position

j - Second position

swap

public static void swap(short[] data,
                        int i,
                        int j)

Swap two values in a short array.

Parameters:

data - Data

i - First position

j - Second position

swap

public static void swap(byte[] data,
                        int i,
                        int j)

Swap two values in a byte array.

Parameters:

data - Data

i - First position

j - Second position

swap

public static void swap(double[] data,
                        int i,
                        int j)

Swap two values in a double array.

Parameters:

data - Data

i - First position

j - Second position

swap

public static void swap(float[] data,
                        int i,
                        int j)

Swap two values in a float array.

Parameters:

data - Data

i - First position

j - Second position

randomShuffle

public static void randomShuffle(int[] data,
                                 java.util.Random random,
                                 int limit)

Random shuffle (part) of an array.

Parameters:

data - Input array

random - Random generator

limit - Number of elements to randomize

randomShuffle

public static void randomShuffle(short[] data,
                                 java.util.Random random,
                                 int limit)

Random shuffle (part) of an array.

Parameters:

data - Input array

random - Random generator

limit - Number of elements to randomize

randomShuffle

public static void randomShuffle(byte[] data,
                                 java.util.Random random,
                                 int limit)

Random shuffle (part) of an array.

Parameters:

data - Input array

random - Random generator

limit - Number of elements to randomize

randomShuffle

public static void randomShuffle(double[] data,
                                 java.util.Random random,
                                 int limit)

Random shuffle (part) of an array.

Parameters:

data - Input array

random - Random generator

limit - Number of elements to randomize

randomShuffle

public static void randomShuffle(float[] data,
                                 java.util.Random random,
                                 int limit)

Random shuffle (part) of an array.

Parameters:

data - Input array

random - Random generator

limit - Number of elements to randomize

randomShuffle

public static <T> void randomShuffle(T[] data,
                                     java.util.Random random,
                                     int limit)

Random shuffle (part) of an array.

Type Parameters:

T - Array object type

Parameters:

data - Input array

random - Random generator

limit - Number of elements to randomize

randomShuffle

public static <T> void randomShuffle(java.util.ArrayList<T> data,
                                     java.util.Random random,
                                     int limit)

Random shuffle (part) of an array.

Type Parameters:

T - Array object type

Parameters:

data - Input array

random - Random generator

limit - Number of elements to randomize