org.boon.primitive

Class Lng

java.lang.Object

org.boon.primitive.Lng

public class Lng
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	Lng.ReduceBy Public interface for a very fast reduce by.

Constructor Summary

Constructors

Constructor and Description
Lng()

Method Summary

Methods

Modifier and Type	Method and Description
static long[]	add(long[] array, long v)
static long[]	add(long[] array, long[] array2)
static long[]	array(long... array)
static long[]	arrayOfLong(int size) Creates an array of bytes
static long	atIndex(long[] array, int index)
static void	atIndex(long[] array, int index, long value)
static long[]	compact(long[] array)
static long[]	copy(long[] array)
static long[]	endSliceOf(long[] array, int endIndex)
static boolean	equals(int start, int end, long[] expected, long[] got) Checks to see if two arrays are equals
static boolean	equals(long[] expected, long[] got) Checks to see if two arrays are equals
static boolean	equals(long expected, long got) Some quick validation for an expected value
static boolean	equalsOrDie(long[] expected, long[] got) Checks to see if two arrays are equals
static boolean	equalsOrDie(long expected, long got) Some quick validation for an expected value
static long[]	grow(long[] array)
static long[]	grow(long[] array, int size)
static int	hashCode(int start, int end, long[] array)
static int	hashCode(long[] array)
static long	idx(long[] array, int index)
static void	idx(long[] array, int index, long value)
static boolean	in(long value, long[] array)
static long[]	insert(long[] array, int idx, long v)
static long[]	insert(long[] array, int fromIndex, long[] values)
static int	len(long[] array)
static int	lengthOf(long[] array)
static long	max(long[] values) max
static long	max(long[] values, int length) max
static long	max(long[] values, int start, int length) Max
static long	mean(long[] values) Average
static long	mean(long[] values, int length) Average
static long	mean(long[] values, int start, int length) Average
static double	meanDouble(long[] values, int start, int length) Used internally to avoid loss and rounding errors a bit.
static long	median(long[] values) Calculate Median
static long	median(long[] values, int length) Calculate Median
static long	median(long[] values, int start, int length) Calculate Median
static long	min(long[] values) Min
static long	min(long[] values, int length) Min
static long	min(long[] values, int start, int length) Min
static long	reduceBy(long[] array, int start, int length, Lng.ReduceBy reduceBy)
static long	reduceBy(long[] array, int start, int length, Object object) Reduce By
static long	reduceBy(long[] array, int length, Lng.ReduceBy reduceBy)
static long	reduceBy(long[] array, int length, Object object) Reduce By
static long	reduceBy(long[] array, int length, Object function, String functionName) Reduce By
static long	reduceBy(long[] array, Lng.ReduceBy reduceBy) A very fast reduce by.
static <T> long	reduceBy(long[] array, T object) Reduce by functional support for int arrays.
static <T> long	reduceBy(long[] array, T object, String methodName) Reduce by functional support for int arrays.
static long[]	shrink(long[] array, int size)
static long[]	slc(long[] array, int startIndex)
static long[]	slc(long[] array, int startIndex, int endIndex)
static long[]	slcEnd(long[] array, int endIndex)
static long[]	sliceOf(long[] array, int startIndex)
static long[]	sliceOf(long[] array, int startIndex, int endIndex)
static int	standardDeviation(long[] values) Calculate Standard Deviation
static long	standardDeviation(long[] values, int length) Calculate standard deviation.
static long	standardDeviation(long[] values, int start, int length) Calculate standard deviation.
static String	str(long value)
static long	sum(long[] values) Sum
static long	sum(long[] values, int length) Sum
static long	sum(long[] values, int start, int length) Big Sum
static long	variance(long[] values) Calculate variance
static long	variance(long[] values, int length) Calculate variance
static long	variance(long[] values, int start, int length) Calculates variance
static double	varianceDouble(long[] values, int start, int length) Internal to avoid rounding errors

Methods inherited from class java.lang.Object

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

Constructor Detail

Lng

public Lng()

Method Detail

str

public static String str(long value)

grow

public static long[] grow(long[] array,
          int size)

grow

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

shrink

public static long[] shrink(long[] array,
            int size)

compact

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

arrayOfLong

public static long[] arrayOfLong(int size)

Creates an array of bytes

Parameters:

size - size of the array you want to make

Returns:

array

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

Parameters:

array -

Returns:

len

public static int len(long[] array)

lengthOf

public static int lengthOf(long[] array)

idx

public static long idx(long[] array,
       int index)

atIndex

public static long atIndex(long[] array,
           int index)

idx

public static void idx(long[] array,
       int index,
       long value)

atIndex

public static void atIndex(long[] array,
           int index,
           long value)

slc

public static long[] slc(long[] array,
         int startIndex,
         int endIndex)

sliceOf

public static long[] sliceOf(long[] array,
             int startIndex,
             int endIndex)

slc

public static long[] slc(long[] array,
         int startIndex)

sliceOf

public static long[] sliceOf(long[] array,
             int startIndex)

slcEnd

public static long[] slcEnd(long[] array,
            int endIndex)

endSliceOf

public static long[] endSliceOf(long[] array,
                int endIndex)

in

public static boolean in(long value,
         long[] array)

copy

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

add

public static long[] add(long[] array,
         long v)

add

public static long[] add(long[] array,
         long[] array2)

insert

public static long[] insert(long[] array,
            int idx,
            long v)

insert

public static long[] insert(long[] array,
            int fromIndex,
            long[] values)

reduceBy

public static long reduceBy(long[] array,
            Lng.ReduceBy reduceBy)

A very fast reduce by. If performance is your thing, this seems to be as fast a plain for loop when benchmarking with JMH.

Parameters:

array - array of items to reduce by

reduceBy - reduceBy interface

Returns:

the final value

reduceBy

public static long reduceBy(long[] array,
            int start,
            int length,
            Lng.ReduceBy reduceBy)

Parameters:

array - array of items to reduce by

start - where to start in the array

length - where to end in the array

reduceBy - the function to do the reduce by

Returns:

the reduction

reduceBy

public static long reduceBy(long[] array,
            int length,
            Lng.ReduceBy reduceBy)

Parameters:

array - array of items to reduce by

length - where to end in the array

reduceBy - the function to do the reduce by

Returns:

the reduction

reduceBy

public static <T> long reduceBy(long[] array,
                T object)

Reduce by functional support for int arrays.

Type Parameters:

T - the type of object

Parameters:

array - array of items to reduce by

object - object that contains the reduce by function

Returns:

the final reduction

reduceBy

public static <T> long reduceBy(long[] array,
                T object,
                String methodName)

Reduce by functional support for int arrays.

Type Parameters:

T - the type of object

Parameters:

array - array of items to reduce by

object - object that contains the reduce by function

Returns:

the final reduction

reduceBy

public static long reduceBy(long[] array,
            int length,
            Object object)

Reduce By

Parameters:

array - array of items to reduce by

length - where to end in the array

object - function

Returns:

reduction

reduceBy

public static long reduceBy(long[] array,
            int length,
            Object function,
            String functionName)

Reduce By

Parameters:

array - array of items to reduce by

length - where to end in the array

function - function

function - functionName

Returns:

reduction

reduceBy

public static long reduceBy(long[] array,
            int start,
            int length,
            Object object)

Reduce By

Parameters:

array - array of items to reduce by

length - where to end in the array

object - function

Returns:

reduction

equalsOrDie

public static boolean equalsOrDie(long expected,
                  long got)

Some quick validation for an expected value

Parameters:

expected - expected this

got - got this

Returns:

returns true or throws an exception

equals

public static boolean equals(long expected,
             long got)

Some quick validation for an expected value

Parameters:

expected - expected this

got - got this

Returns:

returns true or false

sum

public static long sum(long[] values)

Sum

Parameters:

values - values in int

Returns:

sum

sum

public static long sum(long[] values,
       int length)

Sum

Parameters:

values - values in int

Returns:

sum

sum

public static long sum(long[] values,
       int start,
       int length)

Big Sum

Parameters:

values - values in int

Returns:

sum

max

public static long max(long[] values,
       int start,
       int length)

Max

Parameters:

values - values in int

Returns:

max

max

public static long max(long[] values)

max

Parameters:

values - values in int

Returns:

max

max

public static long max(long[] values,
       int length)

max

Parameters:

values - values in int

Returns:

max

min

public static long min(long[] values,
       int start,
       int length)

Min

Parameters:

values - values in int

Returns:

min

min

public static long min(long[] values)

Min

Parameters:

values - values in int

Returns:

min

min

public static long min(long[] values,
       int length)

Min

Parameters:

values - values in int

Returns:

min

mean

public static long mean(long[] values,
        int start,
        int length)

Average

Parameters:

values - values in int

Returns:

average

mean

public static long mean(long[] values,
        int length)

Average

Parameters:

values - values in int

Returns:

average

mean

public static long mean(long[] values)

Average

Parameters:

values - values in int

Returns:

average

variance

public static long variance(long[] values,
            int start,
            int length)

Calculates variance

Parameters:

values - values

start - start

length - length

Returns:

variance

meanDouble

public static double meanDouble(long[] values,
                int start,
                int length)

Used internally to avoid loss and rounding errors a bit.

Parameters:

values - values

start - start

length - length

Returns:

meanDouble

varianceDouble

public static double varianceDouble(long[] values,
                    int start,
                    int length)

Internal to avoid rounding errors

Parameters:

values - values

start - start

length - length

Returns:

double value

variance

public static long variance(long[] values,
            int length)

Calculate variance

Parameters:

values -

length -

Returns:

variance

variance

public static long variance(long[] values)

Calculate variance

Parameters:

values -

Returns:

variance

standardDeviation

public static long standardDeviation(long[] values,
                     int start,
                     int length)

Calculate standard deviation.

Parameters:

values - values

start - start

length - length

Returns:

standard deviation

standardDeviation

public static long standardDeviation(long[] values,
                     int length)

Calculate standard deviation.

Parameters:

values - values

length - length

Returns:

standard deviation

standardDeviation

public static int standardDeviation(long[] values)

Calculate Standard Deviation

Parameters:

values - values

Returns:

standardDeviation

median

public static long median(long[] values,
          int start,
          int length)

Calculate Median

Parameters:

values - values

start - start

length - length

Returns:

median

median

public static long median(long[] values,
          int length)

Calculate Median

Parameters:

values - values

length - length

Returns:

median

median

public static long median(long[] values)

Calculate Median

Parameters:

values - values

Returns:

median

equalsOrDie

public static boolean equalsOrDie(long[] expected,
                  long[] got)

Checks to see if two arrays are equals

Parameters:

expected - expected array

got - got array

Returns:

true if equal or throws exception if not.

equals

public static boolean equals(long[] expected,
             long[] got)

Checks to see if two arrays are equals

Parameters:

expected - expected array

got - got array

Returns:

true if equal or false if not.

equals

public static boolean equals(int start,
             int end,
             long[] expected,
             long[] got)

Checks to see if two arrays are equals

Parameters:

expected - expected array

got - got array

Returns:

true if equal or false if not.

hashCode

public static int hashCode(long[] array)

hashCode

public static int hashCode(int start,
           int end,
           long[] array)