water.util

Class Utils

java.lang.Object

water.util.Utils

public class Utils
extends java.lang.Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Utils.AtomicDoubleArray
static class	Utils.AtomicFloatArray
static class	Utils.AtomicIntArray
static class	Utils.AtomicLongArray
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
static class	Utils.IcedLong

Field Summary

Fields

Modifier and Type	Field and Description
static java.util.regex.Pattern[]	ILLEGAL_CHARACTERS Java-string illegal characters which need to be escaped
static byte[][][]	MMS
static java.lang.String[]	REPLACEMENTS

Constructor Summary

Constructors

Constructor and Description
Utils()

Method Summary

Methods

Modifier and Type	Method and Description
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 double[][]	append(double[][] a, double[][] b)
static double[]	append(double[] a, double e)
static int[]	append(int[] a, int[] b)
static long[][][]	append(long[][][] a, long[][] e)
static java.lang.String[]	append(java.lang.String[] a, java.lang.String[] b)
static <T> T[]	append(T[] a, T... b)
static long	attemptTimeParse(ValueString str)
static double	avg(double[] nums)
static double	avg(long[] nums)
static java.lang.String	className(java.lang.String path)
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[][] second)
static int[]	compose(int[] first, int[] transf)
static boolean	contains(int[] a, int d)
static boolean	contains(java.lang.String[] names, java.lang.String name)
static boolean	contains(java.lang.String s, java.lang.CharSequence cs) Returns true if given string contains at least on of character of given sequence.
static int[]	difference(int[] a, int[] b)
static int	digit(int x, int c)
static double[]	div(double[] nums, double n)
static float[]	div(float[] nums, float n)
static float[]	div(float[] nums, int n)
static float	entropy(byte[] f)
static boolean	equalsWithinOneSmallUlp(double a, double b)
static boolean	equalsWithinOneSmallUlp(float a, float b) Compare two numbers to see if they are within one ulp of the smaller decade.
static java.lang.String	escapeJava(java.lang.String s) Escape all " and \ characters to provide a proper Java-like string Does not escape unicode characters.
static int[]	filter(int[] values, boolean[] filter, int fcnt)
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 int[]	or(int[] a, int[] b)
static java.lang.String	p2d(double d)
static java.lang.String	p5d(double d)
static int[][]	pack(int[] values, boolean[] usemap)
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 void	readFile(java.io.File file, java.io.OutputStream out)
static int[]	remove(int[] a, int i)
static <T> T[]	remove(T[] a, int i)
static java.lang.StringBuilder	replace(java.lang.StringBuilder sb, java.lang.CharSequence from, java.lang.CharSequence to) Replace given characters in a given string builder.
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, long seed)
static <T> T[]	subarray(T[] a, int off, int len)
static double	sum(double[] from)
static float	sum(float[] from)
static int	sum(int[] from)
static java.io.File	tmp() Returns the system temporary folder, e.g.
static java.lang.String[]	toStringMap(int[] dom)
static java.lang.String[]	toStringMap(int first, int last)
static java.lang.String[]	union(java.lang.String[] a, java.lang.String[] b)
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

ILLEGAL_CHARACTERS

public static final java.util.regex.Pattern[] ILLEGAL_CHARACTERS

Java-string illegal characters which need to be escaped

REPLACEMENTS

public static final java.lang.String[] REPLACEMENTS

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)

equalsWithinOneSmallUlp

public static boolean equalsWithinOneSmallUlp(float a,
                              float b)

Compare two numbers to see if they are within one ulp of the smaller decade. Order of the arguments does not matter.

Parameters:

a - First number

b - Second number

Returns:

true if a and b are essentially equal, false otherwise.

equalsWithinOneSmallUlp

public static boolean equalsWithinOneSmallUlp(double a,
                              double b)

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)

sum

public static float sum(float[] from)

sum

public static double sum(double[] 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,
                long seed)

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)

readFile

public static void readFile(java.io.File file,
            java.io.OutputStream out)

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)

or

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

or

public static int[] or(int[] a,
       int[] 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)

append

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

append

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

append

public static java.lang.String[] append(java.lang.String[] a,
                        java.lang.String[] b)

append

public static double[] append(double[] a,
              double e)

append

public static long[][][] append(long[][][] a,
                long[][] e)

append

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

remove

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

remove

public static int[] remove(int[] a,
           int i)

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)

tmp

public static java.io.File tmp()

Returns the system temporary folder, e.g. /tmp

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)

toStringMap

public static java.lang.String[] toStringMap(int first,
                             int last)

compose

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

compose

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

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

className

public static java.lang.String className(java.lang.String path)

avg

public static double avg(double[] nums)

avg

public static double avg(long[] nums)

div

public static float[] div(float[] nums,
          int n)

div

public static float[] div(float[] nums,
          float n)

div

public static double[] div(double[] nums,
           double n)

replace

public static java.lang.StringBuilder replace(java.lang.StringBuilder sb,
                              java.lang.CharSequence from,
                              java.lang.CharSequence to)

Replace given characters in a given string builder. The number of characters to replace has to match to number of characters serving as a replacement.

Parameters:

sb - string builder containing a string to be modified

from - characters to replaced

to - replacement characters

Returns:

original string builder with replaced characters.

contains

public static boolean contains(java.lang.String s,
               java.lang.CharSequence cs)

Returns true if given string contains at least on of character of given sequence.

Parameters:

s - string

cs - a sequence of character

Returns:

true if s contains at least one of character from given sequence, else false

contains

public static boolean contains(java.lang.String[] names,
               java.lang.String name)

escapeJava

public static java.lang.String escapeJava(java.lang.String s)

Escape all " and \ characters to provide a proper Java-like string Does not escape unicode characters.

union

public static java.lang.String[] union(java.lang.String[] a,
                       java.lang.String[] b)

filter

public static int[] filter(int[] values,
           boolean[] filter,
           int fcnt)

pack

public static int[][] pack(int[] values,
           boolean[] usemap)