Module io.jenetics.base

Package io.jenetics.internal.util

Class Arrays

java.lang.Object

io.jenetics.internal.util.Arrays

public final class Arrays
extends Object

Helper class which contains array helper methods.

Since:

3.0

Version:

3.0

Method Summary

Modifier and Type	Method	Description
static int[]	add(int[] array, int b)
static void	rangeCheck(int from, int to)
static double[]	revert(double[] array)
static int[]	revert(int[] array)
static long[]	revert(long[] array)
static <T> T[]	revert(T[] array)
static double[]	shuffle(double[] array, RandomGenerator random)	Randomize the array using the given RandomGenerator object.
static int[]	shuffle(int[] array, RandomGenerator random)
static long	sum(long[] values)
static void	swap(double[] array, int i, int j)
static void	swap(int[] array, int i, int j)
static void	swap(long[] array, int i, int j)
static <T> void	swap(T[] array, int i, int j)

Methods inherited from class java.lang.Object

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

Method Details

swap

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

swap

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

swap

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

swap

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

revert

public static <T> T[] revert(T[] array)

revert

public static int[] revert(int[] array)

revert

public static long[] revert(long[] array)

revert

public static double[] revert(double[] array)

shuffle

public static double[] shuffle(double[] array,
 RandomGenerator random)

Randomize the array using the given RandomGenerator object. The used shuffling algorithm is from D. Knuth TAOCP, Seminumerical Algorithms, Third edition, page 142, Algorithm S (Selection sampling technique).

Parameters:

array - the array to shuffle

random - the PRNG

Returns:

the shuffled array

shuffle

public static int[] shuffle(int[] array,
 RandomGenerator random)

add

public static int[] add(int[] array,
 int b)

rangeCheck

public static void rangeCheck(int from,
 int to)

sum

public static long sum(long[] values)