one.microstream.math.XMath

public final class XMath
extends Object

Constructor Summary

Constructors

Constructor Description

XMath()

Method Summary

Modifier and Type	Method	Description
`static long`	`addCapped(long l1, long l2)`
`static double`	`avg(double... values)`
`static float`	`avg(float... values)`
`static int`	`avg(int... values)`
`static long`	`avg(long... values)`
`static BigDecimal`	`bigDec(double value)`	Alias for `BigDecimal.valueOf(value)`
`static BigDecimal`	`bigDec(long value)`	Alias for `BigDecimal.valueOf(value)`
`static BigInteger`	`bigInt(int value)`	Alias for `BigInteger.valueOf(value)`
`static BigInteger`	`bigInt(long value)`	Alias for `BigInteger.valueOf(value)`
`static int`	`cap_int(long value)`
`static double[]`	`column(int columnIndex, double[]... matrix)`
`static double`	`columnSum(int columnIndex, double[]... matrix)`
`static double`	`columnSum(int columnIndex, Double[]... matrix)`
`static double`	`cube(double d)`
`static float`	`cube(float f)`
`static int`	`cube(int i)`
`static long`	`cube(long l)`
`static long`	`equal(long value1, long value2)`
`static int`	`even(int value)`
`static long`	`even(long value)`
`static int`	`factorial(int n)`	Use `factorial(long)` for n in [0;20]. Use `factorial(BigInteger)` for any n greater than 0.
`static long`	`factorial(long n)`	Use `factorial(BigInteger)` for any n greater than 0.
`static BigInteger`	`factorial(BigInteger n)`
`static double`	`fractionToPercent(double decimalFractionValue)`
`static int`	`highestPowerOf2_int()`
`static boolean`	`isGreaterThanHighestPowerOf2(int value)`
`static boolean`	`isGreaterThanHighestPowerOf2(long value)`
`static boolean`	`isGreaterThanOrEqualHighestPowerOf2(int value)`
`static boolean`	`isGreaterThanOrEqualHighestPowerOf2(long value)`
`static boolean`	`isIn(int value, int... searchValues)`
`static boolean`	`isPow2(int value)`	Determines if the passed value is a power-of-2 value.
`static int`	`log10discrete(int value)`	Returns the integer value of base-10 logarithm of the passed value.
`static int`	`log2pow2(int pow2Value)`
`static double`	`lowerRatio(double a, double b)`	Returns abs(d1/d2) for abs(d1) lower than abs(d2), else abs(d2/d1) in order to guarantee a codomain of [0.0;1.0]
`static double`	`max(double... values)`
`static float`	`max(float... values)`
`static int`	`max(int... values)`
`static long`	`max(long... values)`
`static double`	`min(double... values)`
`static float`	`min(float... values)`
`static int`	`min(int... values)`
`static long`	`min(long... values)`
`static <E> double`	`min_double(Iterable<E> elements, To_double<? super E> getter)`
`static <E> double`	`min_double(Iterable<E> elements, To_double<? super E> getter, double defaultValue)`
`static <E> Double`	`minDouble(Iterable<E> elements, To_double<? super E> getter)`
`static int`	`negative(int value)`
`static long`	`negative(long value)`
`static double`	`notNegative(double value)`
`static int`	`notNegative(int value)`
`static long`	`notNegative(long value)`
`static Integer`	`notNegative(Integer value)`
`static Long`	`notNegative(Long value)`
`static double`	`notNegativeMax1(double value)`
`static int`	`odd(int value)`
`static long`	`odd(long value)`
`static Double`	`one()`
`static double`	`percentToFraction(double decimalPercentValue)`
`static double`	`positive(double value)`
`static float`	`positive(float value)`
`static int`	`positive(int value)`
`static long`	`positive(long value)`
`static double`	`positiveMax1(double value)`
`static double`	`pow(double base, int exponent)`
`static float`	`pow(float base, int exponent)`
`static int`	`pow(int base, int exponent)`	This method is an int version of `Math.pow(double, double)`, using only integer iteration for calculation.
`static int`	`pow10(int exponent)`
`static double`	`pow10_double(int exponent)`
`static long`	`pow10_long(int exponent)`
`static int`	`pow2Bound(int n)`
`static int`	`pow2BoundCapped(int n)`
`static int`	`pow2BoundMaxed(int n)`
`static Random`	`random()`
`static int`	`random(int n)`
`static int[]`	`randoming(int length)`
`static int[]`	`randoming(int length, int bound)`
`static int[]`	`randoming(int length, int lowestValue, int bound)`
`static _longRange`	`range(int start, int bound)`
`static double`	`round(double value, int decimals)`	Rounds `value` to the actual closest value for `decimals` decimals. This is useful as well in order to "normalize" values if multiple subsequent calulations with double values accumulate rounding errors that drift the value away from the value it actually should (could) be. See the "candy" example in Joshua Bloch's "Effective Java": this method fixes the problem.
`static double`	`round0(double value)`
`static double`	`round1(double value)`	Common rounding variant for 1 decimal.
`static double`	`round2(double value)`	Common rounding variant for 2 decimals.
`static double`	`round3(double value)`	Common rounding variant for 3 decimals.
`static double`	`round4(double value)`	Common rounding variant for 4 decimals.
`static double`	`round5(double value)`	Common rounding variant for 5 decimals.
`static double`	`round6(double value)`	Common rounding variant for 6 decimals.
`static double`	`round7(double value)`	Common rounding variant for 7 decimals.
`static double`	`round8(double value)`	Common rounding variant for 8 decimals.
`static double`	`round9(double value)`	Common rounding variant for 9 decimals.
`static byte[]`	`sequence(byte from, byte to)`
`static int[]`	`sequence(int lastValue)`
`static int[]`	`sequence(int from, int to)`
`static long[]`	`sequence(long from, long to)`
`static short[]`	`sequence(short from, short to)`
`static Integer[]`	`sequence(Integer lastValue)`
`static double`	`square(double d)`
`static float`	`square(float f)`
`static int`	`square(int i)`
`static long`	`square(long l)`
`static int`	`stringLength(int value)`	Returns the amount of digits the passed values requires to be projected as a string.
`static long`	`sum(byte... values)`
`static double`	`sum(double... values)`
`static double`	`sum(float... values)`
`static long`	`sum(int... values)`
`static long`	`sum(long... values)`
`static long`	`sum(short... values)`
`static Double`	`zero()`

Methods inherited from class java.lang.Object

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

Constructor Details
- XMath
  
  public XMath()
Method Details
- zero
  
  public static Double zero()
- one
  
  public static Double one()
- pow
  
  public static final int pow(int base, int exponent) throws IllegalArgumentException
  
  This method is an int version of Math.pow(double, double), using only integer iteration for calculation.
  As a rule of thumb:
  It is faster for exponent lower than 250 (significantly faster for exponents lt 100) and slower for exponent greater than or equal 250 (significantly slower for exponents gt/e 500).
  This may depend on the concrete system running the program, of course.
  Note that exponent may not be negative, otherwise an IllegalArgumentException is thrown.
  
  Parameters:
  
  base -
  
  exponent - my not be negative
  
  Returns:
  
  base^exponent
  
  Throws:
  
  IllegalArgumentException - if exponent is negative
- pow10
  
  public static final int pow10(int exponent) throws IllegalArgumentException
  
  Throws:
  
  IllegalArgumentException
- pow10_double
  
  public static final double pow10_double(int exponent) throws IllegalArgumentException
  
  Throws:
  
  IllegalArgumentException
- pow10_long
  
  public static final long pow10_long(int exponent) throws IllegalArgumentException
  
  Throws:
  
  IllegalArgumentException
- pow2BoundMaxed
  
  public static final int pow2BoundMaxed(int n)
- pow2BoundCapped
  
  public static final int pow2BoundCapped(int n)
- pow2Bound
  
  public static final int pow2Bound(int n)
- log2pow2
  
  public static final int log2pow2(int pow2Value)
- isPow2
  
  public static final boolean isPow2(int value)
  
  Determines if the passed value is a power-of-2 value.
  
  Parameters:
  
  value - the value to be tested.
  
  Returns:
  
  true for any n in [0;30] that satisfies value = 2^n.
- log10discrete
  
  public static final int log10discrete(int value) throws IllegalArgumentException
  Returns the integer value of base-10 logarithm of the passed value.
  Examples:
  log10(1) = 0 log10(8) = 0 log10(10) = 1 log10(99) = 1 log10(100) = 2 log10(1000000000) = 9 log10(2147483647) = 9
  Note that passing a value lower than or equal 0 will throw an IllegalArgumentException.
  Parameters:
  
  value -
  
  Throws:
  
  IllegalArgumentException
- stringLength
  
  public static final int stringLength(int value)
  Returns the amount of digits the passed values requires to be projected as a string.
  The additional length for the minus of to represent negative values is acounted for as well.
  Examples:
  stringLength(0) = 1 stringLength(+6) = 1 stringLength(10) = 2 stringLength(+2147483647) = 10 stringLength(-1) = 2 stringLength(-2147483648) = 11
  Parameters:
  
  value - the int value whose string length shall be calculated
  
  Returns:
  
  the length the passed value's string representation will require.
- pow
  
  public static final float pow(float base, int exponent) throws IllegalArgumentException
  
  Throws:
  
  IllegalArgumentException
- pow
  
  public static final double pow(double base, int exponent) throws IllegalArgumentException
  
  Throws:
  
  IllegalArgumentException
- square
  
  public static final float square(float f)
- square
  
  public static final long square(long l)
- square
  
  public static final int square(int i)
- square
  
  public static final double square(double d)
- cube
  
  public static final float cube(float f)
- cube
  
  public static final long cube(long l)
- cube
  
  public static final int cube(int i)
- cube
  
  public static final double cube(double d)
- round0
  
  public static final double round0(double value)
- round1
  
  public static final double round1(double value)
  
  Common rounding variant for 1 decimal.
  
  Parameters:
  
  value - the decimal value to be rounded.
  
  Returns:
  
  the passed value rounded to 1 decimal.
- round2
  
  public static final double round2(double value)
  
  Common rounding variant for 2 decimals.
  
  Parameters:
  
  value - the decimal value to be rounded.
  
  Returns:
  
  the passed value rounded to 2 decimals.
- round3
  
  public static final double round3(double value)
  
  Common rounding variant for 3 decimals.
  
  Parameters:
  
  value - the decimal value to be rounded.
  
  Returns:
  
  the passed value rounded to 3 decimals.
- round4
  
  public static final double round4(double value)
  
  Common rounding variant for 4 decimals.
  
  Parameters:
  
  value - the decimal value to be rounded.
  
  Returns:
  
  the passed value rounded to 4 decimals.
- round5
  
  public static final double round5(double value)
  
  Common rounding variant for 5 decimals.
  
  Parameters:
  
  value - the decimal value to be rounded.
  
  Returns:
  
  the passed value rounded to 5 decimals.
- round6
  
  public static final double round6(double value)
  
  Common rounding variant for 6 decimals.
  
  Parameters:
  
  value - the decimal value to be rounded.
  
  Returns:
  
  the passed value rounded to 6 decimals.
- round7
  
  public static final double round7(double value)
  
  Common rounding variant for 7 decimals.
  
  Parameters:
  
  value - the decimal value to be rounded.
  
  Returns:
  
  the passed value rounded to 7 decimals.
- round8
  
  public static final double round8(double value)
  
  Common rounding variant for 8 decimals.
  
  Parameters:
  
  value - the decimal value to be rounded.
  
  Returns:
  
  the passed value rounded to 8 decimals.
- round9
  
  public static final double round9(double value)
  
  Common rounding variant for 9 decimals.
  
  Parameters:
  
  value - the decimal value to be rounded.
  
  Returns:
  
  the passed value rounded to 9 decimals.
- round
  
  public static final double round(double value, int decimals)
  
  Rounds value to the actual closest value for decimals decimals.
  This is useful as well in order to "normalize" values if multiple subsequent calulations with double values accumulate rounding errors that drift the value away from the value it actually should (could) be.
  See the "candy" example in Joshua Bloch's "Effective Java": this method fixes the problem.
  Note that decimals may not be negative.
  Also note that while a value of 0 for decimals will yield the correct result, it makes not much sense to call this method for it in the first place.
  
  Parameters:
  
  value - any double value
  
  decimals - the number of decimals. May not be negative.
  
  Returns:
  
  the normalized value for value
- range
  
  public static _longRange range(int start, int bound)
- sequence
  
  public static byte[] sequence(byte from, byte to)
- sequence
  
  public static short[] sequence(short from, short to)
- sequence
  
  public static int[] sequence(int lastValue)
- randoming
  
  public static int[] randoming(int length)
- randoming
  
  public static int[] randoming(int length, int bound)
- randoming
  
  public static int[] randoming(int length, int lowestValue, int bound)
- sequence
  
  public static Integer[] sequence(Integer lastValue)
- sequence
  
  public static int[] sequence(int from, int to)
- sequence
  
  public static long[] sequence(long from, long to) throws IllegalArgumentException
  
  Throws:
  
  IllegalArgumentException
- max
  
  public static final double max(double... values)
- max
  
  public static final float max(float... values)
- max
  
  public static final int max(int... values)
- max
  
  public static final long max(long... values)
- min
  
  public static final double min(double... values)
- min
  
  public static final float min(float... values)
- min
  
  public static final int min(int... values)
- min
  
  public static final long min(long... values)
- sum
  
  public static final long sum(byte... values)
- sum
  
  public static final long sum(short... values)
- sum
  
  public static final long sum(int... values)
- sum
  
  public static final double sum(float... values)
- sum
  
  public static final long sum(long... values)
- sum
  
  public static final double sum(double... values)
- columnSum
  
  public static final double columnSum(int columnIndex, double[]... matrix)
- columnSum
  
  public static final double columnSum(int columnIndex, Double[]... matrix)
- avg
  
  public static final double avg(double... values)
- avg
  
  public static final float avg(float... values)
- avg
  
  public static final int avg(int... values)
- avg
  
  public static final long avg(long... values)
- lowerRatio
  
  public static final double lowerRatio(double a, double b)
  
  Returns abs(d1/d2) for abs(d1) lower than abs(d2), else abs(d2/d1) in order to guarantee a codomain of [0.0;1.0]
  
  Parameters:
  
  a - the first value
  
  b - the second value
  
  Returns:
  
  the lower ratio of d1 and d2
- factorial
  
  public static final int factorial(int n) throws IllegalArgumentException
  
  Use factorial(long) for n in [0;20].
  Use factorial(BigInteger) for any n greater than 0.
  
  Parameters:
  
  n - natural number in [0;12]
  
  Returns:
  
  n!
  
  Throws:
  
  IllegalArgumentException - for n lower than 0 or n greater than 12.
- factorial
  
  public static final long factorial(long n) throws IllegalArgumentException
  
  Use factorial(BigInteger) for any n greater than 0.
  
  Parameters:
  
  n - natural number in [0;20]
  
  Returns:
  
  n!
  
  Throws:
  
  IllegalArgumentException - for n lower than 0 or n greater than 20
- factorial
  
  public static final BigInteger factorial(BigInteger n) throws IllegalArgumentException
  
  Parameters:
  
  n - any natural number greater than or equal 0
  
  Returns:
  
  n!
  
  Throws:
  
  IllegalArgumentException - for n lower than 0
- bigInt
  
  public static final BigInteger bigInt(int value)
  
  Alias for BigInteger.valueOf(value)
  
  Parameters:
  
  value - any value
  
  Returns:
  
  a BigInteger representing value
- bigInt
  
  public static final BigInteger bigInt(long value)
  
  Alias for BigInteger.valueOf(value)
  
  Parameters:
  
  value - any value
  
  Returns:
  
  a BigInteger representing value
- bigDec
  
  public static final BigDecimal bigDec(long value)
  
  Alias for BigDecimal.valueOf(value)
  
  Parameters:
  
  value - any value
  
  Returns:
  
  a BigDecimal representing value
- bigDec
  
  public static final BigDecimal bigDec(double value)
  
  Alias for BigDecimal.valueOf(value)
  
  Parameters:
  
  value - any value
  
  Returns:
  
  a BigDecimal representing value
- random
  
  public static final Random random()
  
  Returns:
  
  the random
- random
  
  public static final int random(int n)
- even
  
  public static int even(int value)
- even
  
  public static long even(long value)
- odd
  
  public static int odd(int value)
- odd
  
  public static long odd(long value)
- positive
  
  public static int positive(int value) throws NumberRangeException
  
  Throws:
  
  NumberRangeException
- notNegative
  
  public static int notNegative(int value) throws NumberRangeException
  
  Throws:
  
  NumberRangeException
- notNegative
  
  public static Integer notNegative(Integer value) throws NumberRangeException
  
  Throws:
  
  NumberRangeException
- negative
  
  public static int negative(int value) throws NumberRangeException
  
  Throws:
  
  NumberRangeException
- positive
  
  public static long positive(long value) throws NumberRangeException
  
  Throws:
  
  NumberRangeException
- notNegative
  
  public static long notNegative(long value) throws NumberRangeException
  
  Throws:
  
  NumberRangeException
- notNegative
  
  public static Long notNegative(Long value) throws NumberRangeException
  
  Throws:
  
  NumberRangeException
- negative
  
  public static long negative(long value) throws NumberRangeException
  
  Throws:
  
  NumberRangeException
- positive
  
  public static double positive(double value) throws NumberRangeException
  
  Throws:
  
  NumberRangeException
- notNegative
  
  public static double notNegative(double value) throws NumberRangeException
  
  Throws:
  
  NumberRangeException
- positiveMax1
  
  public static double positiveMax1(double value) throws NumberRangeException
  
  Throws:
  
  NumberRangeException
- notNegativeMax1
  
  public static double notNegativeMax1(double value) throws NumberRangeException
  
  Throws:
  
  NumberRangeException
- positive
  
  public static float positive(float value) throws NumberRangeException
  
  Throws:
  
  NumberRangeException
- equal
  
  public static long equal(long value1, long value2) throws IllegalArgumentException
  
  Throws:
  
  IllegalArgumentException
- column
  
  public static double[] column(int columnIndex, double[]... matrix)
- cap_int
  
  public static final int cap_int(long value)
- isGreaterThanOrEqualHighestPowerOf2
  
  public static final boolean isGreaterThanOrEqualHighestPowerOf2(long value)
- isGreaterThanHighestPowerOf2
  
  public static final boolean isGreaterThanHighestPowerOf2(long value)
- isGreaterThanOrEqualHighestPowerOf2
  
  public static final boolean isGreaterThanOrEqualHighestPowerOf2(int value)
- isGreaterThanHighestPowerOf2
  
  public static final boolean isGreaterThanHighestPowerOf2(int value)
- highestPowerOf2_int
  
  public static final int highestPowerOf2_int()
- fractionToPercent
  
  public static final double fractionToPercent(double decimalFractionValue)
- percentToFraction
  
  public static final double percentToFraction(double decimalPercentValue)
- isIn
  
  public static final boolean isIn(int value, int... searchValues)
- addCapped
  
  public static long addCapped(long l1, long l2)
- minDouble
  
  public static <E> Double minDouble(Iterable<E> elements, To_double<? super E> getter)
- min_double
  
  public static <E> double min_double(Iterable<E> elements, To_double<? super E> getter)
- min_double
  
  public static <E> double min_double(Iterable<E> elements, To_double<? super E> getter, double defaultValue)

Class XMath

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Details

Method Details