ArrayUtil (nd4j-common 1.0.0-M1.1 API)

java.lang.Object
- org.nd4j.common.util.ArrayUtil

```
public class ArrayUtil
extends Object
```
Author:

Adam Gibson

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static boolean`	`allUnique(int[] toTest)` Returns true if all of the elements in the given int array are unique
`static boolean`	`anyLargerThan(int[] arrs, int check)`
`static boolean`	`anyLess(int[] target, int[] test)`
`static boolean`	`anyLessThan(int[] arrs, int check)`
`static boolean`	`anyMore(int[] target, int[] test)`
`static int`	`argMax(int[] in)` Returns the index of the maximum value in the array.
`static int`	`argMax(long[] in)` Returns the index of the maximum value in the array.
`static int`	`argMin(int[] in)` Returns the index of the minimum value in the array.
`static int`	`argMin(long[] in)` Returns the index of the minimum value in the array.
`static int`	`argMinOfMax(int[]... arrays)`
`static int`	`argMinOfMax(int[] first, int[] second)`
`static long`	`argMinOfMax(long[]... arrays)`
`static long`	`argMinOfMax(long[] first, long[] second)`
`static int`	`argMinOfSum(int[] first, int[] second)`
`static int[]`	`argsort(int[] a)` Original credit: https://github.com/alberts/array4j/blob/master/src/main/java/net/lunglet/util/ArrayUtils.java
`static int[]`	`argsort(int[] a, boolean ascending)`
`static int`	`arrayLength(Object current)` Calculate the length of the object or primitive array.
`static int[]`	`arrayShape(Object array)` Calculate the shape of an arbitrary multi-dimensional array.
`static int[]`	`arrayShape(Object array, boolean allowSize0Dims)` Calculate the shape of an arbitrary multi-dimensional array. Note that the method assumes the array is rectangular (not ragged) and first elements (i.e., array[0][0][0]...) are non-null Note also that if allowSize0Dims is true, any elements are length 0, all subsequent dimensions will be reported as 0.
`static <T> void`	`assertNotRagged(T[] array)` Assert that the specified array is not ragged (i.e., is rectangular). Can be used to check Object arrays with any number of dimensions (up to rank 4), or primitive arrays with rank 2 or higher An IllegalStateException is thrown if the array is ragged
`static void`	`assertSquare(double[]... d)`
`static int[]`	`buildHalfVector(Random rng, int length)`
`static int[]`	`buildInterleavedVector(Random rng, int length)`
`static long[]`	`buildInterleavedVector(Random rng, long length)`
`static int`	`calcOffset(int[] shape, int[] offsets, int[] strides)` Compute the offset based on teh shape strides and offsets
`static int`	`calcOffset(List<Integer> shape, List<Integer> offsets, List<Integer> strides)` Compute the offset based on teh shape strides and offsets
`static long`	`calcOffset(long[] shape, long[] offsets, long[] strides)` Compute the offset based on teh shape strides and offsets
`static long`	`calcOffsetLong(int[] shape, int[] offsets, int[] strides)` Compute the offset based on teh shape strides and offsets
`static long`	`calcOffsetLong(List<Integer> shape, List<Integer> offsets, List<Integer> strides)` Compute the offset based on teh shape strides and offsets
`static long`	`calcOffsetLong2(List<Long> shape, List<Long> offsets, List<Long> strides)`
`static int[]`	`calcStrides(int[] shape)` Computes the standard packed array strides for a given shape.
`static int[]`	`calcStrides(int[] shape, int startValue)` Computes the standard packed array strides for a given shape.
`static long[]`	`calcStrides(long[] shape)`
`static long[]`	`calcStrides(long[] shape, int startValue)` Computes the standard packed array strides for a given shape.
`static int[]`	`calcStridesFortran(int[] shape)` Computes the standard packed array strides for a given shape.
`static int[]`	`calcStridesFortran(int[] shape, int startNum)` Computes the standard packed array strides for a given shape.
`static long[]`	`calcStridesFortran(long[] shape)`
`static long[]`	`calcStridesFortran(long[] shape, int startNum)` Computes the standard packed array strides for a given shape.
`static <E> E[]`	`combine(E[]... arrs)`
`static double[]`	`combine(float[]... ints)` Combines a apply of int arrays in to one flat int array
`static int[]`	`combine(int[]... ints)` Combines a apply of int arrays in to one flat int array
`static float[]`	`combine(List<float[]> nums)` Combines a apply of int arrays in to one flat int array
`static long[]`	`combine(long[]... ints)` Combines a apply of long arrays in to one flat long array
`static double[]`	`combineDouble(List<double[]> nums)` Combines a apply of int arrays in to one flat int array
`static float[]`	`combineFloat(List<float[]> nums)` Combines a applyTransformToDestination of int arrays in to one flat int array
`static int[]`	`consArray(int a, int[] as)`
`static boolean`	`contains(int[] arr, int value)`
`static boolean`	`contains(long[] arr, int value)`
`static boolean`	`containsAnyNegative(int[] arr)` Returns true if any array elements are negative.
`static boolean`	`containsAnyNegative(long[] arr)`
`static int[]`	`convertNegativeIndices(int range, int[] axes)` Convert all dimensions in the specified axes array to be positive based on the specified range of values
`static String[]`	`convertToString(int[] arr)` Convert a int array to a string array
`static double[]`	`copy(double[] data)`
`static float[]`	`copy(float[] data)`
`static int[]`	`copy(int[] copy)`
`static long[]`	`copy(long[] copy)`
`static int[]`	`copyOfRangeFrom(int length, int from, int to)` Generate an array from 0 to length and generate take a subset
`static byte[]`	`cutBelowZero(byte[] data)`
`static int[]`	`cutBelowZero(int[] data)`
`static long[]`	`cutBelowZero(long[] data)`
`static short[]`	`cutBelowZero(short[] data)`
`static int`	`dotProduct(int[] xs, int[] ys)`
`static int`	`dotProduct(List<Integer> xs, List<Integer> ys)`
`static long`	`dotProductLong(int[] xs, int[] ys)`
`static long`	`dotProductLong(List<Integer> xs, List<Integer> ys)`
`static long`	`dotProductLong2(List<Long> xs, List<Long> ys)`
`static double[]`	`doubleCopyOf(float[] data)`
`static int[]`	`empty()`
`static boolean`	`equals(float[] data, double[] data2)`
`static <T> T[]`	`filterNull(T... in)`
`static boolean[]`	`flatten(boolean[][] arr)`
`static boolean[]`	`flatten(boolean[][][] arr)`
`static boolean[]`	`flatten(boolean[][][][] arr)`
`static byte[]`	`flatten(byte[][] arr)`
`static byte[]`	`flatten(byte[][][] arr)`
`static byte[]`	`flatten(byte[][][][] arr)`
`static double[]`	`flatten(double[][] arr)` Convert a 2darray in to a flat array (row wise)
`static double[]`	`flatten(double[][][] arr)`
`static double[]`	`flatten(double[][][][] arr)`
`static float[]`	`flatten(float[][] arr)`
`static float[]`	`flatten(float[][][] arr)`
`static float[]`	`flatten(float[][][][] arr)`
`static int[]`	`flatten(int[][] arr)`
`static int[]`	`flatten(int[][][] arr)`
`static int[]`	`flatten(int[][][][] arr)`
`static long[]`	`flatten(long[][] arr)`
`static long[]`	`flatten(long[][][] arr)`
`static long[]`	`flatten(long[][][][] arr)`
`static short[]`	`flatten(short[][] arr)`
`static short[]`	`flatten(short[][][] arr)`
`static short[]`	`flatten(short[][][][] arr)`
`static double[]`	`flattenDoubleArray(Object doubleArray)` Convert an arbitrary-dimensional rectangular double array to flat vector. Can pass double[], double[][], double[][][], etc.
`static double[]`	`flattenF(double[][] arr)` Convert a 2darray in to a flat array (row wise)
`static float[]`	`flattenF(float[][] arr)`
`static int[]`	`flattenF(int[][] arr)`
`static long[]`	`flattenF(long[][] arr)`
`static float[]`	`flattenFloatArray(Object floatArray)` Convert an arbitrary-dimensional rectangular float array to flat vector. Can pass float[], float[][], float[][][], etc.
`static float[]`	`floatCopyOf(double[] data)`
`static int`	`fromBoolean(boolean bool)` Convert an int
`static short`	`fromFloat(float v)`
`static <T> T`	`getRandomElement(List<T> list)`
`static long[]`	`getTensorMmulShape(long[] aShape, long[] bShape, int[][] axes)` Get the tensor matrix multiply shape
`static boolean`	`greaterThan(int[] target, int[] test)`
`static int[]`	`invertPermutation(int... input)` Compute the inverse permutation indices for a permutation operation Example: if input is [2, 0, 1] then output is [1, 2, 0] The idea is that x.permute(input).permute(invertPermutation(input)) == x
`static long[]`	`invertPermutation(long... input)`
`static boolean`	`isEmptyShape(int[] shape)` Is this shape an empty shape? Shape is considered to be an empty shape if it contains any zeros.
`static boolean`	`isEmptyShape(long[] shape)` Is this shape an empty shape? Shape is considered to be an empty shape if it contains any zeros.
`static boolean`	`isInverse(int[] first, int[] second)` Returns true if the given two arrays are reverse copies of each other
`static boolean`	`isZero(int[] as)` Returns true if any of the elements are zero
`static boolean`	`isZero(long[] as)`
`static int[]`	`keep(int[] data, int... index)` Return a copy of this array with only the given index(es) remaining
`static long[]`	`keep(long[] data, int... index)` Return a copy of this array with only the given index(es) remaining
`static boolean`	`lessThan(int[] target, int[] test)`
`static boolean`	`listOfIntsContains(List<int[]> list, int[] target)` Proper comparison contains for list of int arrays
`static int`	`max(int[] in)` Returns the maximum value in the array
`static int`	`min(int[] in)` Returns the minimum value in the array
`static int[]`	`mod(int[] input, int mod)`
`static void`	`multiplyBy(int[] arr, int mult)` Multiply the given array by the given scalar
`static int`	`nonOneStride(int[] arr)` For use with row vectors to ensure consistent strides with varying offsets
`static int[]`	`nTimes(int n, int toReplicate)` Repeat a value n times
`static <T> T[]`	`nTimes(int n, T toReplicate, Class<T> tClass)`
`static long[]`	`nTimes(long n, long toReplicate)`
`static int[]`	`of(int... arr)`
`static int`	`offsetFor(int[] stride, int i)` Calculate the offset for a given stride array
`static int[]`	`permute(int[] shape, int[] dimensions)` Permute the given input switching the dimensions of the input shape array with in the order of the specified dimensions
`static long[]`	`permute(long[] shape, int[] dimensions)`
`static int[]`	`plus(int[] ints, int mult)`
`static int[]`	`plus(int[] ints, int[] mult)`
`static int`	`prod(int... mult)` Product of an int array
`static int`	`prod(List<Integer> mult)` Product of an int array
`static int`	`prod(long... mult)` Product of an int array
`static long`	`prodLong(int... mult)` Product of an int array
`static long`	`prodLong(List<? extends Number> mult)` Product of an int array
`static long`	`prodLong(long... mult)`
`static int[]`	`randomPermutation(int size)` Credit to mikio braun from jblas Create a random permutation of the numbers 0, ..., size - 1.
`static double[]`	`range(double[] data, int to)` Returns a subset of an array from 0 to "to" (exclusive)
`static double[]`	`range(double[] data, int to, int stride)` Returns a subset of an array from 0 to "to" (exclusive) using the specified stride
`static double[]`	`range(double[] data, int to, int stride, int numElementsEachStride)` Returns a subset of an array from 0 to "to" using the specified stride
`static int[]`	`range(int from, int to)` Generate an int array ranging from "from" to "to".
`static int[]`	`range(int from, int to, int increment)` Generate an int array ranging from "from" to "to".
`static long[]`	`range(long from, long to)`
`static long[]`	`range(long from, long to, long increment)`
`static double[]`	`read(int length, DataInputStream dis)`
`static double[]`	`readDouble(int length, DataInputStream dis)`
`static float[]`	`readFloat(int length, DataInputStream dis)`
`static int[]`	`removeIndex(int[] data, int... index)` Return a copy of this array with the given index omitted PLEASE NOTE: index to be omitted must exist in source array.
`static int[]`	`removeIndex(int[] data, int index)` Return a copy of this array with the given index omitted
`static Integer[]`	`removeIndex(Integer[] data, int index)` Returns the array with the item in index removed, if the array is empty it will return the array itself
`static long[]`	`removeIndex(long[] data, int... index)`
`static long[]`	`removeIndex(long[] data, int index)`
`static int[]`	`replace(int[] data, int index, int newValue)` Return a copy of this array with the given index omitted
`static boolean[][]`	`reshapeBoolean(boolean[] in, int rows, int cols)`
`static boolean[][][]`	`reshapeBoolean(boolean[] in, int d0, int d1, int d2)`
`static double[][]`	`reshapeDouble(double[] in, int rows, int cols)`
`static double[][][]`	`reshapeDouble(double[] in, int d0, int d1, int d2)`
`static int[][]`	`reshapeInt(int[] in, int rows, int cols)`
`static int[][][]`	`reshapeInt(int[] in, int d0, int d1, int d2)`
`static long[][]`	`reshapeLong(long[] in, int rows, int cols)`
`static long[][][]`	`reshapeLong(long[] in, int d0, int d1, int d2)`
`static <T> T[][]`	`reshapeObject(T[] in, int rows, int cols)`
`static <T> T[][][]`	`reshapeObject(T[] in, int d0, int d1, int d2)`
`static <E> void`	`reverse(E[] e)`
`static void`	`reverse(int[] e)` Reverse the passed in array in place
`static void`	`reverse(long[] e)`
`static <E> E[]`	`reverseCopy(E[] e)`
`static float[]`	`reverseCopy(float[] e)`
`static int[]`	`reverseCopy(int[] e)` Create a backwards copy of the given array
`static long[]`	`reverseCopy(long[] e)`
`static <T> void`	`shuffleWithMap(List<T> objects, int[] map)`
`static <K,V extends Comparable<? super V>> Map<K,V>`	`sortMapByValue(Map<K,V> map)`
`static int`	`sum(int[] add)` Sum of an int array
`static int`	`sum(List<Integer> add)` Sum of an int array
`static long`	`sumLong(long... add)`
`protected static <T> void`	`swap(List<T> objects, int idxA, int idxB)`
`static int[]`	`times(int[] ints, int mult)`
`static int[]`	`times(int[] ints, int[] mult)`
`static int[]`	`toArray(List<Integer> list)`
`static double[]`	`toArrayDouble(List<Double> list)`
`static long[]`	`toArrayLong(List<Long> list)`
`static short`	`toBFloat16(double data)`
`static short`	`toBFloat16(float data)`
`static short[]`	`toBfloats(float[] data)`
`static short[]`	`toBfloats(int[] data)`
`static short[]`	`toBfloats(long[] data)`
`static byte[]`	`toByteArray(double[] doubleArray)`
`static byte[]`	`toByteArray(float[] doubleArray)`
`static byte[]`	`toByteArray(int[] intArray)`
`static byte[]`	`toBytes(double[] array)`
`static byte[]`	`toBytes(float[] array)`
`static byte[]`	`toBytes(int[] array)`
`static byte[]`	`toBytes(long[] array)`
`static double[]`	`toDouble(int[] data)`
`static double[][]`	`toDouble(int[][] arr)` Cast an int array to a double array
`static double[]`	`toDouble(long[] data)`
`static double[]`	`toDoubleArray(byte[] byteArray)`
`static double[]`	`toDoubles(float[] ints)`
`static double[]`	`toDoubles(int[] ints)`
`static double[]`	`toDoubles(int[][] ints)`
`static double[]`	`toDoubles(long[] ints)`
`static float[]`	`toFloatArray(byte[] byteArray)`
`static float[]`	`toFloats(double[] ints)`
`static float[]`	`toFloats(int[] ints)`
`static float[]`	`toFloats(int[][] ints)`
`static float[]`	`toFloats(long[] ints)`
`static short`	`toHalf(double data)`
`static short`	`toHalf(float data)`
`static short[]`	`toHalfs(double[] data)`
`static short[]`	`toHalfs(float[] data)`
`static short[]`	`toHalfs(int[] data)`
`static short[]`	`toHalfs(long[] data)`
`static int[]`	`toIntArray(byte[] byteArray)`
`static int[]`	`toInts(double[] data)`
`static int[]`	`toInts(float[] data)`
`static int[]`	`toInts(long[] array)`
`static List<Integer>`	`toList(int... ints)`
`static long[]`	`toLongArray(float[] array)`
`static long[]`	`toLongArray(int[] intArray)`
`static long[]`	`toLongs(boolean[] data)`
`static long[]`	`toLongs(byte[] data)`
`static long[]`	`toLongs(double[] data)`
`static long[]`	`toLongs(float[] data)`
`static long[]`	`toLongs(int[] data)`
`static long[]`	`toLongs(short[] data)`
`static int[]`	`toOutcomeArray(int outcome, int numOutcomes)`
`static boolean[]`	`toPrimitives(Boolean[] array)`
`static boolean[][]`	`toPrimitives(Boolean[][] array)`
`static boolean[][][]`	`toPrimitives(Boolean[][][] array)`
`static boolean[][][][]`	`toPrimitives(Boolean[][][][] array)`
`static byte[]`	`toPrimitives(Byte[] array)`
`static byte[][]`	`toPrimitives(Byte[][] array)`
`static byte[][][]`	`toPrimitives(Byte[][][] array)`
`static byte[][][][]`	`toPrimitives(Byte[][][][] array)`
`static double[]`	`toPrimitives(Double[] array)`
`static double[][]`	`toPrimitives(Double[][] array)`
`static double[][][]`	`toPrimitives(Double[][][] array)`
`static double[][][][]`	`toPrimitives(Double[][][][] array)`
`static float[]`	`toPrimitives(Float[] array)`
`static float[][]`	`toPrimitives(Float[][] array)`
`static float[][][]`	`toPrimitives(Float[][][] array)`
`static float[][][][]`	`toPrimitives(Float[][][][] array)`
`static int[]`	`toPrimitives(Integer[] array)`
`static int[][]`	`toPrimitives(Integer[][] array)`
`static int[][][]`	`toPrimitives(Integer[][][] array)`
`static int[][][][]`	`toPrimitives(Integer[][][][] array)`
`static long[]`	`toPrimitives(Long[] array)`
`static long[][]`	`toPrimitives(Long[][] array)`
`static long[][][]`	`toPrimitives(Long[][][] array)`
`static long[][][][]`	`toPrimitives(Long[][][][] array)`
`static short[]`	`toPrimitives(Short[] array)`
`static short[][]`	`toPrimitives(Short[][] array)`
`static short[][][]`	`toPrimitives(Short[][][] array)`
`static short[][][][]`	`toPrimitives(Short[][][][] array)`
`static short[]`	`toShorts(double[] ints)`
`static short[]`	`toShorts(float[] ints)`
`static short[]`	`toShorts(int[] ints)`
`static short[]`	`toShorts(long[] ints)`
`static int[]`	`valueStartingAt(int valueStarting, int[] copy, int idxFrom, int idxAt, int length)` Create a copy of the given array starting at the given index with the given length.
`static void`	`write(double[] data, DataOutputStream dos)`
`static void`	`write(float[] data, DataOutputStream dos)`
`static List<double[]>`	`zerosMatrix(int... dimensions)`
`static List<double[]>`	`zerosMatrix(long... dimensions)`
`static int[][]`	`zip(int[] as, int[] bs)` Zip 2 arrays in to:

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

containsAnyNegative
```
public static boolean containsAnyNegative(int[] arr)
```
Returns true if any array elements are negative. If the array is null, it returns false

Parameters:

arr - the array to test

Returns:

containsAnyNegative

public static boolean containsAnyNegative(long[] arr)

contains

public static boolean contains(int[] arr,
                               int value)

contains

public static boolean contains(long[] arr,
                               int value)

anyLargerThan

public static boolean anyLargerThan(int[] arrs,
                                    int check)

Parameters:: arrs -; check -
Returns:

anyLessThan

public static boolean anyLessThan(int[] arrs,
                                  int check)

Parameters:: arrs -; check -
Returns:

convertToString
```
public static String[] convertToString(int[] arr)
```
Convert a int array to a string array

Parameters:

arr - the array to convert

Returns:

the equivalent string array

listOfIntsContains
```
public static boolean listOfIntsContains(List<int[]> list,
                                         int[] target)
```
Proper comparison contains for list of int arrays

Parameters:

list - the to search

target - the target int array

Returns:

whether the given target array is contained in the list

nTimes
```
public static int[] nTimes(int n,
                           int toReplicate)
```
Repeat a value n times

Parameters:

n - the number of times to repeat

toReplicate - the value to repeat

Returns:

an array of length n filled with the given value

nTimes

public static long[] nTimes(long n,
                            long toReplicate)

nTimes

public static <T> T[] nTimes(int n,
                             T toReplicate,
                             Class<T> tClass)

allUnique
```
public static boolean allUnique(int[] toTest)
```
Returns true if all of the elements in the given int array are unique

Parameters:

toTest - the array to test

Returns:

true if all o fthe items are unique false otherwise

randomPermutation
```
public static int[] randomPermutation(int size)
```
Credit to mikio braun from jblas
Create a random permutation of the numbers 0, ..., size - 1.
see Algorithm P, D.E. Knuth: The Art of Computer Programming, Vol. 2, p. 145

toBFloat16

public static short toBFloat16(float data)

toBFloat16

public static short toBFloat16(double data)

toHalf

public static short toHalf(float data)

toHalf

public static short toHalf(double data)

toHalfs

public static short[] toHalfs(float[] data)

toHalfs

public static short[] toHalfs(int[] data)

toHalfs

public static short[] toHalfs(long[] data)

toBfloats

public static short[] toBfloats(float[] data)

toBfloats

public static short[] toBfloats(int[] data)

toBfloats

public static short[] toBfloats(long[] data)

toLongs

public static long[] toLongs(byte[] data)

toLongs

public static long[] toLongs(boolean[] data)

toLongs

public static long[] toLongs(short[] data)

toLongs

public static long[] toLongs(int[] data)

toLongs

public static long[] toLongs(float[] data)

toLongs

public static long[] toLongs(double[] data)

toHalfs

public static short[] toHalfs(double[] data)

fromFloat

public static short fromFloat(float v)

toInts

public static int[] toInts(float[] data)

toInts

public static int[] toInts(double[] data)

toBytes

public static byte[] toBytes(int[] array)

toBytes

public static byte[] toBytes(float[] array)

toBytes

public static byte[] toBytes(double[] array)

toBytes

public static byte[] toBytes(long[] array)

toInts

public static int[] toInts(long[] array)

mod

public static int[] mod(int[] input,
                        int mod)

offsetFor
```
public static int offsetFor(int[] stride,
                            int i)
```
Calculate the offset for a given stride array

Parameters:

stride - the stride to use

i - the offset to calculate for

Returns:

the offset for the given stride

sum
```
public static int sum(List<Integer> add)
```
Sum of an int array

Parameters:

add - the elements to calculate the sum for

Returns:

the sum of this array

sum
```
public static int sum(int[] add)
```
Sum of an int array

Parameters:

add - the elements to calculate the sum for

Returns:

the sum of this array

sumLong

public static long sumLong(long... add)

prod
```
public static int prod(List<Integer> mult)
```
Product of an int array

Parameters:

mult - the elements to calculate the sum for

Returns:

the product of this array

prod
```
public static int prod(long... mult)
```
Product of an int array

Parameters:

mult - the elements to calculate the sum for

Returns:

the product of this array

prod
```
public static int prod(int... mult)
```
Product of an int array

Parameters:

mult - the elements to calculate the sum for

Returns:

the product of this array

prodLong
```
public static long prodLong(List<? extends Number> mult)
```
Product of an int array

Parameters:

mult - the elements to calculate the sum for

Returns:

the product of this array

prodLong
```
public static long prodLong(int... mult)
```
Product of an int array

Parameters:

mult - the elements to calculate the sum for

Returns:

the product of this array

prodLong

public static long prodLong(long... mult)

equals

public static boolean equals(float[] data,
                             double[] data2)

consArray

public static int[] consArray(int a,
                              int[] as)

isZero
```
public static boolean isZero(int[] as)
```
Returns true if any of the elements are zero

Parameters:

as -

Returns:

isZero

public static boolean isZero(long[] as)

anyMore

public static boolean anyMore(int[] target,
                              int[] test)

anyLess

public static boolean anyLess(int[] target,
                              int[] test)

lessThan

public static boolean lessThan(int[] target,
                               int[] test)

greaterThan

public static boolean greaterThan(int[] target,
                                  int[] test)

calcOffset
```
public static int calcOffset(List<Integer> shape,
                             List<Integer> offsets,
                             List<Integer> strides)
```
Compute the offset based on teh shape strides and offsets

Parameters:

shape - the shape to compute

offsets - the offsets to compute

strides - the strides to compute

Returns:

the offset for the given shape,offset,and strides

calcOffset
```
public static int calcOffset(int[] shape,
                             int[] offsets,
                             int[] strides)
```
Compute the offset based on teh shape strides and offsets

Parameters:

shape - the shape to compute

offsets - the offsets to compute

strides - the strides to compute

Returns:

the offset for the given shape,offset,and strides

calcOffset
```
public static long calcOffset(long[] shape,
                              long[] offsets,
                              long[] strides)
```
Compute the offset based on teh shape strides and offsets

Parameters:

shape - the shape to compute

offsets - the offsets to compute

strides - the strides to compute

Returns:

the offset for the given shape,offset,and strides

calcOffsetLong

public static long calcOffsetLong(List<Integer> shape,
                                  List<Integer> offsets,
                                  List<Integer> strides)

Compute the offset based on teh shape strides and offsets

Parameters:: shape - the shape to compute; offsets - the offsets to compute; strides - the strides to compute
Returns:: the offset for the given shape,offset,and strides

calcOffsetLong2

public static long calcOffsetLong2(List<Long> shape,
                                   List<Long> offsets,
                                   List<Long> strides)

calcOffsetLong
```
public static long calcOffsetLong(int[] shape,
                                  int[] offsets,
                                  int[] strides)
```
Compute the offset based on teh shape strides and offsets

Parameters:

shape - the shape to compute

offsets - the offsets to compute

strides - the strides to compute

Returns:

the offset for the given shape,offset,and strides

dotProduct

public static int dotProduct(List<Integer> xs,
                             List<Integer> ys)

Parameters:: xs -; ys -
Returns:

dotProduct

public static int dotProduct(int[] xs,
                             int[] ys)

Parameters:: xs -; ys -
Returns:

dotProductLong

public static long dotProductLong(List<Integer> xs,
                                  List<Integer> ys)

Parameters:: xs -; ys -
Returns:

dotProductLong2

public static long dotProductLong2(List<Long> xs,
                                   List<Long> ys)

Parameters:: xs -; ys -
Returns:

dotProductLong

public static long dotProductLong(int[] xs,
                                  int[] ys)

Parameters:: xs -; ys -
Returns:

empty
```
public static int[] empty()
```

of
```
public static int[] of(int... arr)
```

copy
```
public static int[] copy(int[] copy)
```

copy

public static long[] copy(long[] copy)

doubleCopyOf

public static double[] doubleCopyOf(float[] data)

floatCopyOf

public static float[] floatCopyOf(double[] data)

range
```
public static double[] range(double[] data,
                             int to)
```
Returns a subset of an array from 0 to "to" (exclusive)

Parameters:

data - the data to getFromOrigin a subset of

to - the end point of the data

Returns:

the subset of the data specified

range
```
public static double[] range(double[] data,
                             int to,
                             int stride)
```
Returns a subset of an array from 0 to "to" (exclusive) using the specified stride

Parameters:

data - the data to getFromOrigin a subset of

to - the end point of the data

stride - the stride to go through the array

Returns:

the subset of the data specified

range
```
public static double[] range(double[] data,
                             int to,
                             int stride,
                             int numElementsEachStride)
```
Returns a subset of an array from 0 to "to" using the specified stride

Parameters:

data - the data to getFromOrigin a subset of

to - the end point of the data

stride - the stride to go through the array

numElementsEachStride - the number of elements to collect at each stride

Returns:

the subset of the data specified

toList

public static List<Integer> toList(int... ints)

toArray

public static int[] toArray(List<Integer> list)

toArrayLong

public static long[] toArrayLong(List<Long> list)

toArrayDouble

public static double[] toArrayDouble(List<Double> list)

range
```
public static int[] range(int from,
                          int to,
                          int increment)
```
Generate an int array ranging from "from" to "to". The total number of elements is (from-to)/increment - i.e., range(0,2,1) returns [0,1] If from is > to this method will count backwards

Parameters:

from - the from

to - the end point of the data

increment - the amount to increment by

Returns:

the int array with a length equal to absoluteValue(from - to)

range

public static long[] range(long from,
                           long to,
                           long increment)

range
```
public static int[] range(int from,
                          int to)
```
Generate an int array ranging from "from" to "to". The total number of elements is (from-to) - i.e., range(0,2) returns [0,1] If from is > to this method will count backwards

Parameters:

from - the from

to - the end point of the data

Returns:

the int array with a length equal to absoluteValue(from - to)

range

public static long[] range(long from,
                           long to)

toDoubles

public static double[] toDoubles(int[] ints)

toDoubles

public static double[] toDoubles(long[] ints)

toDoubles

public static double[] toDoubles(float[] ints)

toFloats

public static float[] toFloats(int[][] ints)

toDoubles

public static double[] toDoubles(int[][] ints)

toShorts

public static short[] toShorts(long[] ints)

toShorts

public static short[] toShorts(int[] ints)

toShorts

public static short[] toShorts(float[] ints)

toShorts

public static short[] toShorts(double[] ints)

toFloats

public static float[] toFloats(int[] ints)

toFloats

public static float[] toFloats(long[] ints)

toFloats

public static float[] toFloats(double[] ints)

cutBelowZero

public static int[] cutBelowZero(int[] data)

cutBelowZero

public static long[] cutBelowZero(long[] data)

cutBelowZero

public static short[] cutBelowZero(short[] data)

cutBelowZero

public static byte[] cutBelowZero(byte[] data)

replace
```
public static int[] replace(int[] data,
                            int index,
                            int newValue)
```
Return a copy of this array with the given index omitted

Parameters:

data - the data to copy

index - the index of the item to remove

newValue - the newValue to replace

Returns:

the new array with the omitted item

keep
```
public static int[] keep(int[] data,
                         int... index)
```
Return a copy of this array with only the given index(es) remaining

Parameters:

data - the data to copy

index - the index of the item to remove

Returns:

the new array with the omitted item

keep
```
public static long[] keep(long[] data,
                          int... index)
```
Return a copy of this array with only the given index(es) remaining

Parameters:

data - the data to copy

index - the index of the item to remove

Returns:

the new array with the omitted item

removeIndex
```
public static int[] removeIndex(int[] data,
                                int... index)
```
Return a copy of this array with the given index omitted PLEASE NOTE: index to be omitted must exist in source array.

Parameters:

data - the data to copy

index - the index of the item to remove

Returns:

the new array with the omitted item

removeIndex

public static long[] removeIndex(long[] data,
                                 int... index)

zip

public static int[][] zip(int[] as,
                          int[] bs)

Zip 2 arrays in to:

Parameters:: as -; bs -
Returns:

getTensorMmulShape
```
public static long[] getTensorMmulShape(long[] aShape,
                                        long[] bShape,
                                        int[][] axes)
```
Get the tensor matrix multiply shape

Parameters:

aShape - the shape of the first array

bShape - the shape of the second array

axes - the axes to do the multiply

Returns:

the shape for tensor matrix multiply

permute
```
public static int[] permute(int[] shape,
                            int[] dimensions)
```
Permute the given input switching the dimensions of the input shape array with in the order of the specified dimensions

Parameters:

shape - the shape to permute

dimensions - the dimensions

Returns:

permute

public static long[] permute(long[] shape,
                             int[] dimensions)

argsort
```
public static int[] argsort(int[] a)
```
Original credit: https://github.com/alberts/array4j/blob/master/src/main/java/net/lunglet/util/ArrayUtils.java

Parameters:

a -

Returns:

argsort

public static int[] argsort(int[] a,
                            boolean ascending)

Parameters:: a -; ascending -
Returns:

convertNegativeIndices
```
public static int[] convertNegativeIndices(int range,
                                           int[] axes)
```
Convert all dimensions in the specified axes array to be positive based on the specified range of values

Parameters:

range -

axes -

Returns:

copyOfRangeFrom
```
public static int[] copyOfRangeFrom(int length,
                                    int from,
                                    int to)
```
Generate an array from 0 to length and generate take a subset

Parameters:

length - the length to generate to

from - the begin of the interval to take

to - the end of the interval to take

Returns:

the generated array

toByteArray

public static byte[] toByteArray(double[] doubleArray)

Parameters:: doubleArray -
Returns:

toDoubleArray

public static double[] toDoubleArray(byte[] byteArray)

Parameters:: byteArray -
Returns:

toByteArray

public static byte[] toByteArray(float[] doubleArray)

Parameters:: doubleArray -
Returns:

toLongArray

public static long[] toLongArray(int[] intArray)

toLongArray

public static long[] toLongArray(float[] array)

toFloatArray

public static float[] toFloatArray(byte[] byteArray)

Parameters:: byteArray -
Returns:

toByteArray

public static byte[] toByteArray(int[] intArray)

Parameters:: intArray -
Returns:

toIntArray

public static int[] toIntArray(byte[] byteArray)

Parameters:: byteArray -
Returns:

removeIndex
```
public static int[] removeIndex(int[] data,
                                int index)
```
Return a copy of this array with the given index omitted

Parameters:

data - the data to copy

index - the index of the item to remove

Returns:

the new array with the omitted item

removeIndex

public static long[] removeIndex(long[] data,
                                 int index)

valueStartingAt
```
public static int[] valueStartingAt(int valueStarting,
                                    int[] copy,
                                    int idxFrom,
                                    int idxAt,
                                    int length)
```
Create a copy of the given array starting at the given index with the given length. The intent here is for striding. For example in slicing, you want the major stride to be first. You achieve this by taking the last index of the matrix's stride and putting this as the first stride of the new ndarray for slicing. All of the elements except the copied elements are initialized as the given value

Parameters:

valueStarting - the starting value

copy - the array to copy

idxFrom - the index to start at in the from array

idxAt - the index to start at in the return array

length - the length of the array to create

Returns:

the given array

removeIndex
```
public static Integer[] removeIndex(Integer[] data,
                                    int index)
```
Returns the array with the item in index removed, if the array is empty it will return the array itself

Parameters:

data - the data to remove data from

index - the index of the item to remove

Returns:

a copy of the array with the removed item, or the array itself if empty

calcStridesFortran
```
public static int[] calcStridesFortran(int[] shape,
                                       int startNum)
```
Computes the standard packed array strides for a given shape.

Parameters:

shape - the shape of a matrix:

startNum - the start number for the strides

Returns:

the strides for a matrix of n dimensions

calcStridesFortran
```
public static long[] calcStridesFortran(long[] shape,
                                        int startNum)
```
Computes the standard packed array strides for a given shape.

Parameters:

shape - the shape of a matrix:

startNum - the start number for the strides

Returns:

the strides for a matrix of n dimensions

calcStridesFortran
```
public static int[] calcStridesFortran(int[] shape)
```
Computes the standard packed array strides for a given shape.

Parameters:

shape - the shape of a matrix:

Returns:

the strides for a matrix of n dimensions

calcStridesFortran

public static long[] calcStridesFortran(long[] shape)

calcStrides
```
public static int[] calcStrides(int[] shape,
                                int startValue)
```
Computes the standard packed array strides for a given shape.

Parameters:

shape - the shape of a matrix:

startValue - the startValue for the strides

Returns:

the strides for a matrix of n dimensions

calcStrides
```
public static long[] calcStrides(long[] shape,
                                 int startValue)
```
Computes the standard packed array strides for a given shape.

Parameters:

shape - the shape of a matrix:

startValue - the startValue for the strides

Returns:

the strides for a matrix of n dimensions

isInverse
```
public static boolean isInverse(int[] first,
                                int[] second)
```
Returns true if the given two arrays are reverse copies of each other

Parameters:

first -

second -

Returns:

plus

public static int[] plus(int[] ints,
                         int mult)

plus

public static int[] plus(int[] ints,
                         int[] mult)

times

public static int[] times(int[] ints,
                          int mult)

times

public static int[] times(int[] ints,
                          int[] mult)

nonOneStride
```
public static int nonOneStride(int[] arr)
```
For use with row vectors to ensure consistent strides with varying offsets

Parameters:

arr - the array to get the stride for

Returns:

the stride

calcStrides
```
public static int[] calcStrides(int[] shape)
```
Computes the standard packed array strides for a given shape.

Parameters:

shape - the shape of a matrix:

Returns:

the strides for a matrix of n dimensions

calcStrides

public static long[] calcStrides(long[] shape)

reverseCopy
```
public static int[] reverseCopy(int[] e)
```
Create a backwards copy of the given array

Parameters:

e - the array to createComplex a reverse clone of

Returns:

the reversed copy

reverseCopy

public static long[] reverseCopy(long[] e)

read

public static double[] read(int length,
                            DataInputStream dis)
                     throws IOException

Throws:: IOException

write

public static void write(double[] data,
                         DataOutputStream dos)
                  throws IOException

Throws:: IOException

readDouble

public static double[] readDouble(int length,
                                  DataInputStream dis)
                           throws IOException

Throws:: IOException

readFloat

public static float[] readFloat(int length,
                                DataInputStream dis)
                         throws IOException

Throws:: IOException

write

public static void write(float[] data,
                         DataOutputStream dos)
                  throws IOException

Throws:: IOException

assertSquare

public static void assertSquare(double[]... d)

multiplyBy
```
public static void multiplyBy(int[] arr,
                              int mult)
```
Multiply the given array by the given scalar

Parameters:

arr - the array to multily

mult - the scalar to multiply by

reverse
```
public static void reverse(int[] e)
```
Reverse the passed in array in place

Parameters:

e - the array to reverse

reverse
```
public static void reverse(long[] e)
```

zerosMatrix

public static List<double[]> zerosMatrix(long... dimensions)

zerosMatrix

public static List<double[]> zerosMatrix(int... dimensions)

reverseCopy

public static float[] reverseCopy(float[] e)

reverseCopy

public static <E> E[] reverseCopy(E[] e)

reverse

public static <E> void reverse(E[] e)

flatten

public static boolean[] flatten(boolean[][] arr)

flatten

public static boolean[] flatten(boolean[][][] arr)

flatten

public static float[] flatten(float[][] arr)

flatten

public static float[] flatten(float[][][] arr)

flatten

public static double[] flatten(double[][][] arr)

flatten

public static int[] flatten(int[][][] arr)

flatten

public static short[] flatten(short[][][] arr)

flatten

public static byte[] flatten(byte[][][] arr)

flatten

public static long[] flatten(long[][][][] arr)

flatten

public static short[] flatten(short[][][][] arr)

flatten

public static byte[] flatten(byte[][][][] arr)

flatten

public static boolean[] flatten(boolean[][][][] arr)

flatten

public static float[] flatten(float[][][][] arr)

flatten

public static double[] flatten(double[][][][] arr)

flatten

public static int[] flatten(int[][][][] arr)

flatten

public static int[] flatten(int[][] arr)

flatten

public static short[] flatten(short[][] arr)

flatten

public static byte[] flatten(byte[][] arr)

flatten

public static long[] flatten(long[][] arr)

flatten

public static long[] flatten(long[][][] arr)

flatten
```
public static double[] flatten(double[][] arr)
```
Convert a 2darray in to a flat array (row wise)

Parameters:

arr - the array to flatten

Returns:

a flattened representation of the array

flattenF
```
public static double[] flattenF(double[][] arr)
```
Convert a 2darray in to a flat array (row wise)

Parameters:

arr - the array to flatten

Returns:

a flattened representation of the array

flattenF

public static float[] flattenF(float[][] arr)

flattenF

public static int[] flattenF(int[][] arr)

flattenF

public static long[] flattenF(long[][] arr)

reshapeInt

public static int[][] reshapeInt(int[] in,
                                 int rows,
                                 int cols)

reshapeInt

public static int[][][] reshapeInt(int[] in,
                                   int d0,
                                   int d1,
                                   int d2)

reshapeDouble

public static double[][] reshapeDouble(double[] in,
                                       int rows,
                                       int cols)

reshapeDouble

public static double[][][] reshapeDouble(double[] in,
                                         int d0,
                                         int d1,
                                         int d2)

reshapeLong

public static long[][] reshapeLong(long[] in,
                                   int rows,
                                   int cols)

reshapeLong

public static long[][][] reshapeLong(long[] in,
                                     int d0,
                                     int d1,
                                     int d2)

reshapeBoolean

public static boolean[][] reshapeBoolean(boolean[] in,
                                         int rows,
                                         int cols)

reshapeBoolean

public static boolean[][][] reshapeBoolean(boolean[] in,
                                           int d0,
                                           int d1,
                                           int d2)

reshapeObject

public static <T> T[][] reshapeObject(T[] in,
                                      int rows,
                                      int cols)

reshapeObject

public static <T> T[][][] reshapeObject(T[] in,
                                        int d0,
                                        int d1,
                                        int d2)

toDouble
```
public static double[][] toDouble(int[][] arr)
```
Cast an int array to a double array

Parameters:

arr - the array to cast

Returns:

the elements of this array cast as an int

combineFloat
```
public static float[] combineFloat(List<float[]> nums)
```
Combines a applyTransformToDestination of int arrays in to one flat int array

Parameters:

nums - the int arrays to combineDouble

Returns:

one combined int array

combine
```
public static float[] combine(List<float[]> nums)
```
Combines a apply of int arrays in to one flat int array

Parameters:

nums - the int arrays to combineDouble

Returns:

one combined int array

combineDouble
```
public static double[] combineDouble(List<double[]> nums)
```
Combines a apply of int arrays in to one flat int array

Parameters:

nums - the int arrays to combineDouble

Returns:

one combined int array

combine
```
public static double[] combine(float[]... ints)
```
Combines a apply of int arrays in to one flat int array

Parameters:

ints - the int arrays to combineDouble

Returns:

one combined int array

combine
```
public static int[] combine(int[]... ints)
```
Combines a apply of int arrays in to one flat int array

Parameters:

ints - the int arrays to combineDouble

Returns:

one combined int array

combine
```
public static long[] combine(long[]... ints)
```
Combines a apply of long arrays in to one flat long array

Parameters:

ints - the int arrays to combineDouble

Returns:

one combined int array

combine

public static <E> E[] combine(E[]... arrs)

toOutcomeArray

public static int[] toOutcomeArray(int outcome,
                                   int numOutcomes)

toDouble

public static double[] toDouble(int[] data)

toDouble

public static double[] toDouble(long[] data)

copy

public static float[] copy(float[] data)

copy

public static double[] copy(double[] data)

flattenDoubleArray
```
public static double[] flattenDoubleArray(Object doubleArray)
```
Convert an arbitrary-dimensional rectangular double array to flat vector.
Can pass double[], double[][], double[][][], etc.

flattenFloatArray
```
public static float[] flattenFloatArray(Object floatArray)
```
Convert an arbitrary-dimensional rectangular float array to flat vector.
Can pass float[], float[][], float[][][], etc.

arrayShape
```
public static int[] arrayShape(Object array)
```
Calculate the shape of an arbitrary multi-dimensional array. Assumes:
(a) array is rectangular (not ragged) and first elements (i.e., array[0][0][0]...) are non-null
(b) First elements have > 0 length. So array[0].length > 0, array[0][0].length > 0, etc.
Can pass any Java array opType: double[], Object[][][], float[][], etc.
Length of returned array is number of dimensions; returned[i] is size of ith dimension.

arrayShape
```
public static int[] arrayShape(Object array,
                               boolean allowSize0Dims)
```
Calculate the shape of an arbitrary multi-dimensional array.
Note that the method assumes the array is rectangular (not ragged) and first elements (i.e., array[0][0][0]...) are non-null
Note also that if allowSize0Dims is true, any elements are length 0, all subsequent dimensions will be reported as 0. i.e., a double[3][0][2] would be reported as shape [3,0,0]. If allowSize0Dims is false, an exception will be thrown for this case instead. Can pass any Java array opType: double[], Object[][][], float[][], etc.
Length of returned array is number of dimensions; returned[i] is size of ith dimension.

max
```
public static int max(int[] in)
```
Returns the maximum value in the array

min
```
public static int min(int[] in)
```
Returns the minimum value in the array

argMax
```
public static int argMax(int[] in)
```
Returns the index of the maximum value in the array. If two entries have same maximum value, index of the first one is returned.

argMin
```
public static int argMin(int[] in)
```
Returns the index of the minimum value in the array. If two entries have same minimum value, index of the first one is returned.

argMax
```
public static int argMax(long[] in)
```
Returns the index of the maximum value in the array. If two entries have same maximum value, index of the first one is returned.

argMin
```
public static int argMin(long[] in)
```
Returns the index of the minimum value in the array. If two entries have same minimum value, index of the first one is returned.

buildHalfVector

public static int[] buildHalfVector(Random rng,
                                    int length)

Returns:

buildInterleavedVector

public static int[] buildInterleavedVector(Random rng,
                                           int length)

buildInterleavedVector

public static long[] buildInterleavedVector(Random rng,
                                            long length)

swap

protected static <T> void swap(List<T> objects,
                               int idxA,
                               int idxB)

shuffleWithMap

public static <T> void shuffleWithMap(List<T> objects,
                                      int[] map)

argMinOfMax

public static int argMinOfMax(int[] first,
                              int[] second)

argMinOfMax

public static long argMinOfMax(long[] first,
                               long[] second)

argMinOfMax

public static int argMinOfMax(int[]... arrays)

argMinOfMax

public static long argMinOfMax(long[]... arrays)

argMinOfSum

public static int argMinOfSum(int[] first,
                              int[] second)

sortMapByValue

public static <K,V extends Comparable<? super V>> Map<K,V> sortMapByValue(Map<K,V> map)

getRandomElement

public static <T> T getRandomElement(List<T> list)

fromBoolean
```
public static int fromBoolean(boolean bool)
```
Convert an int

Parameters:

bool -

Returns:

toPrimitives

public static long[] toPrimitives(Long[] array)

toPrimitives

public static int[] toPrimitives(Integer[] array)

toPrimitives

public static short[] toPrimitives(Short[] array)

toPrimitives

public static byte[] toPrimitives(Byte[] array)

toPrimitives

public static float[] toPrimitives(Float[] array)

toPrimitives

public static double[] toPrimitives(Double[] array)

toPrimitives

public static boolean[] toPrimitives(Boolean[] array)

toPrimitives

public static long[][] toPrimitives(Long[][] array)

toPrimitives

public static int[][] toPrimitives(Integer[][] array)

toPrimitives

public static short[][] toPrimitives(Short[][] array)

toPrimitives

public static byte[][] toPrimitives(Byte[][] array)

toPrimitives

public static double[][] toPrimitives(Double[][] array)

toPrimitives

public static float[][] toPrimitives(Float[][] array)

toPrimitives

public static boolean[][] toPrimitives(Boolean[][] array)

toPrimitives

public static long[][][] toPrimitives(Long[][][] array)

toPrimitives

public static int[][][] toPrimitives(Integer[][][] array)

toPrimitives

public static short[][][] toPrimitives(Short[][][] array)

toPrimitives

public static byte[][][] toPrimitives(Byte[][][] array)

toPrimitives

public static double[][][] toPrimitives(Double[][][] array)

toPrimitives

public static float[][][] toPrimitives(Float[][][] array)

toPrimitives

public static boolean[][][] toPrimitives(Boolean[][][] array)

toPrimitives

public static long[][][][] toPrimitives(Long[][][][] array)

toPrimitives

public static int[][][][] toPrimitives(Integer[][][][] array)

toPrimitives

public static short[][][][] toPrimitives(Short[][][][] array)

toPrimitives

public static byte[][][][] toPrimitives(Byte[][][][] array)

toPrimitives

public static double[][][][] toPrimitives(Double[][][][] array)

toPrimitives

public static float[][][][] toPrimitives(Float[][][][] array)

toPrimitives

public static boolean[][][][] toPrimitives(Boolean[][][][] array)

assertNotRagged
```
public static <T> void assertNotRagged(T[] array)
```
Assert that the specified array is not ragged (i.e., is rectangular).
Can be used to check Object arrays with any number of dimensions (up to rank 4), or primitive arrays with rank 2 or higher
An IllegalStateException is thrown if the array is ragged

Parameters:

array - Array to check

arrayLength
```
public static int arrayLength(Object current)
```
Calculate the length of the object or primitive array. If

Parameters:

current -

Returns:

invertPermutation
```
public static int[] invertPermutation(int... input)
```
Compute the inverse permutation indices for a permutation operation
Example: if input is [2, 0, 1] then output is [1, 2, 0]
The idea is that x.permute(input).permute(invertPermutation(input)) == x

Parameters:

input - 1D indices for permutation

Returns:

1D inverted permutation

invertPermutation
```
public static long[] invertPermutation(long... input)
```
Parameters:

input - 1D indices for permutation

Returns:

1D inverted permutation

See Also:

invertPermutation(int...)

isEmptyShape
```
public static boolean isEmptyShape(long[] shape)
```
Is this shape an empty shape? Shape is considered to be an empty shape if it contains any zeros. Note: a length 0 shape is NOT considered empty (it's rank 0 scalar)

Parameters:

shape - Shape to check

Returns:

True if shape contains zeros

isEmptyShape
```
public static boolean isEmptyShape(int[] shape)
```
Is this shape an empty shape? Shape is considered to be an empty shape if it contains any zeros. Note: a length 0 shape is NOT considered empty (it's rank 0 scalar)

Parameters:

shape - Shape to check

Returns:

True if shape contains zeros

filterNull

public static <T> T[] filterNull(T... in)

Class ArrayUtil

Method Summary

Methods inherited from class java.lang.Object

Method Detail

containsAnyNegative

containsAnyNegative

contains

contains

anyLargerThan

anyLessThan

convertToString

listOfIntsContains

nTimes

nTimes

nTimes

allUnique

randomPermutation

toBFloat16

toBFloat16

toHalf

toHalf

toHalfs

toHalfs

toHalfs

toBfloats

toBfloats

toBfloats

toLongs

toLongs

toLongs

toLongs

toLongs

toLongs

toHalfs

fromFloat

toInts

toInts

toBytes

toBytes

toBytes

toBytes

toInts

mod

offsetFor

sum

sum

sumLong

prod

prod

prod

prodLong

prodLong

prodLong

equals

consArray

isZero

isZero

anyMore

anyLess

lessThan

greaterThan

calcOffset

calcOffset

calcOffset

calcOffsetLong

calcOffsetLong2

calcOffsetLong

dotProduct

dotProduct

dotProductLong

dotProductLong2

dotProductLong

empty

of

copy

copy

doubleCopyOf

floatCopyOf

range

range