water.util
Class Utils

java.lang.Object
  water.util.Utils

public class Utils
extends java.lang.Object

Nested Class Summary

static class	Utils.ExpectedExceptionForDebug
static class	Utils.IcedArrayList<T extends Iced> Simple wrapper around ArrayList with support for H2O serialization
static class	Utils.IcedHashMap<K extends Iced,V extends Iced> Simple wrapper around HashMap with support for H2O serialization
static class	Utils.IcedInt

Field Summary

static byte[][][]

MMS

Constructor Summary

Utils()

Method Summary

static byte[]	add(byte[] a, byte[] b)
static double[][]	add(double[][] a, double[][] b)
static double[]	add(double[] a, double[] b)
static float[][]	add(float[][] a, float[][] b)
static float[]	add(float[] a, float[] b)
static int[][]	add(int[][] a, int[][] b)
static int[]	add(int[] a, int[] b)
static long[][]	add(long[][] a, long[][] b)
static long[]	add(long[] a, long[] b)
static <T> T[]	add(T[] a, T... b)
static long	attemptTimeParse(ValueString str)
static void	clearFolder(java.io.File folder)
static void	clearFolder(java.lang.String folder)
static void	close(java.io.Closeable... closeable)
static void	close(java.net.Socket s)
static int[]	compose(int[] first, int[] transf)
static boolean	contains(int[] a, int d)
static int[]	difference(int[] a, int[] b)
static int	digit(int x, int c)
static float	entropy(byte[] f)
static int	get4(byte[] buf, int off)
static double	get8d(byte[] buf, int off)
static java.util.Random	getDeterRNG(long seed)
static byte[]	getFirstUnzipedBytes(Key k)
static byte[]	getFirstUnzipedBytes(Value v)
static java.util.Random	getRNG(long... seed)
static java.lang.String	getStackAsString(java.lang.Throwable t)
static H2ORandomRNG.RNGKind	getUsedRNGKind()
static H2ORandomRNG.RNGType	getUsedRNGType()
static ParseDataset.Compression	guessCompressionMethod(byte[] bits)
static boolean	hasNaNsOrInfs(double[] arr)
static boolean	isEmpty(int[] a)
static java.lang.String	join(char sep, java.lang.Iterable it)
static java.lang.String	join(char sep, java.lang.Object[] array)
static double	lnF(double what)
static ValueArray	loadAndParseKey(Key okey, java.lang.String path)
static ValueArray	loadAndParseKey(java.lang.String path)
static int[]	mapping(int[] dom) Returns a mapping of given domain to values (0, ...
static int	maxIndex(float[] from)
static int	maxIndex(int[] from)
static int	maxIndex(int[] from, java.util.Random rand) Returns the index of the largest value in the array.
static byte[]	or(byte[] a, byte[] b)
static java.lang.String	p2d(double d)
static java.lang.String	p5d(double d)
static java.lang.String	pprint(double[][] arr)
static java.lang.String	pprint(double[][] arr, java.text.DecimalFormat dformat)
static java.lang.String	readConsole()
static java.lang.String	readFile(java.io.File file)
static <T> T[]	remove(T[] a, int i)
static java.lang.String	sampleToString(int[] val, int max)
static int[]	seq(int start, int stop) Generates sequence
static int	set4(byte[] buf, int off, int x)
static int	set8d(byte[] buf, int off, double d)
static void	setUsedRNGKind(H2ORandomRNG.RNGKind kind)
static void	setUsedRNGType(H2ORandomRNG.RNGType rngType)
static void	shuffleArray(long[] a)
static <T> T[]	subarray(T[] a, int off, int len)
static int	sum(int[] from)
static java.lang.String[]	toStringMap(int[] dom)
static int[]	unpackInts(long... longs)
static byte[]	unzipBytes(byte[] bs, ParseDataset.Compression cmp)
static java.io.File	writeFile(java.io.File file, java.lang.String content)
static java.io.File	writeFile(java.lang.String content)
static void	writeFileAndClose(java.io.File file, java.io.InputStream in)

Methods inherited from class java.lang.Object

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

Field Detail

MMS

public static final byte[][][] MMS

Constructor Detail

Utils

public Utils()

Method Detail

maxIndex

public static int maxIndex(int[] from,
                           java.util.Random rand)

Returns the index of the largest value in the array. In case of a tie, an the index is selected randomly.

maxIndex

public static int maxIndex(int[] from)

maxIndex

public static int maxIndex(float[] from)

lnF

public static double lnF(double what)

p2d

public static java.lang.String p2d(double d)

p5d

public static java.lang.String p5d(double d)

set4

public static int set4(byte[] buf,
                       int off,
                       int x)

get4

public static int get4(byte[] buf,
                       int off)

set8d

public static int set8d(byte[] buf,
                        int off,
                        double d)

get8d

public static double get8d(byte[] buf,
                           int off)

sum

public static int sum(int[] from)

sampleToString

public static java.lang.String sampleToString(int[] val,
                                              int max)

getDeterRNG

public static java.util.Random getDeterRNG(long seed)

setUsedRNGKind

public static void setUsedRNGKind(H2ORandomRNG.RNGKind kind)

getRNG

public static java.util.Random getRNG(long... seed)

setUsedRNGType

public static void setUsedRNGType(H2ORandomRNG.RNGType rngType)

getUsedRNGType

public static H2ORandomRNG.RNGType getUsedRNGType()

getUsedRNGKind

public static H2ORandomRNG.RNGKind getUsedRNGKind()

entropy

public static float entropy(byte[] f)

unpackInts

public static int[] unpackInts(long... longs)

shuffleArray

public static void shuffleArray(long[] a)

close

public static void close(java.io.Closeable... closeable)

close

public static void close(java.net.Socket s)

readConsole

public static java.lang.String readConsole()

writeFile

public static java.io.File writeFile(java.lang.String content)

writeFile

public static java.io.File writeFile(java.io.File file,
                                     java.lang.String content)

writeFileAndClose

public static void writeFileAndClose(java.io.File file,
                                     java.io.InputStream in)

readFile

public static java.lang.String readFile(java.io.File file)

join

public static java.lang.String join(char sep,
                                    java.lang.Object[] array)

join

public static java.lang.String join(char sep,
                                    java.lang.Iterable it)

add

public static <T> T[] add(T[] a,
                          T... b)

remove

public static <T> T[] remove(T[] a,
                             int i)

or

public static byte[] or(byte[] a,
                        byte[] b)

add

public static byte[] add(byte[] a,
                         byte[] b)

add

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

add

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

add

public static long[] add(long[] a,
                         long[] b)

add

public static long[][] add(long[][] a,
                           long[][] b)

add

public static float[] add(float[] a,
                          float[] b)

add

public static float[][] add(float[][] a,
                            float[][] b)

add

public static double[] add(double[] a,
                           double[] b)

add

public static double[][] add(double[][] a,
                             double[][] b)

subarray

public static <T> T[] subarray(T[] a,
                               int off,
                               int len)

clearFolder

public static void clearFolder(java.lang.String folder)

clearFolder

public static void clearFolder(java.io.File folder)

loadAndParseKey

public static ValueArray loadAndParseKey(java.lang.String path)

loadAndParseKey

public static ValueArray loadAndParseKey(Key okey,
                                         java.lang.String path)

getFirstUnzipedBytes

public static byte[] getFirstUnzipedBytes(Key k)

getFirstUnzipedBytes

public static byte[] getFirstUnzipedBytes(Value v)

guessCompressionMethod

public static ParseDataset.Compression guessCompressionMethod(byte[] bits)

unzipBytes

public static byte[] unzipBytes(byte[] bs,
                                ParseDataset.Compression cmp)

hasNaNsOrInfs

public static final boolean hasNaNsOrInfs(double[] arr)

getStackAsString

public static java.lang.String getStackAsString(java.lang.Throwable t)

digit

public static int digit(int x,
                        int c)

attemptTimeParse

public static long attemptTimeParse(ValueString str)

mapping

public static int[] mapping(int[] dom)

Returns a mapping of given domain to values (0, ... max(dom)). Unused domain items has mapping to -1.

toStringMap

public static java.lang.String[] toStringMap(int[] dom)

compose

public static int[] compose(int[] first,
                            int[] transf)

pprint

public static java.lang.String pprint(double[][] arr)

pprint

public static java.lang.String pprint(double[][] arr,
                                      java.text.DecimalFormat dformat)

isEmpty

public static boolean isEmpty(int[] a)

contains

public static boolean contains(int[] a,
                               int d)

difference

public static int[] difference(int[] a,
                               int[] b)

seq

public static int[] seq(int start,
                        int stop)

Generates sequence