java.lang.Object
- cern.jet.math.IntFunctions

```
public class IntFunctions
extends java.lang.Object
```
Integer Function objects to be passed to generic methods. Same as Functions except operating on integers.
For aliasing see intFunctions.

Version:

1.0, 09/24/99

Field Summary

Fields
Modifier and Type	Field	Description
`static IntFunction`	`abs`	Function that returns `Math.abs(a) == (a < 0) ? -a : a`.
`static IntIntFunction`	`and`	Function that returns `a & b`.
`static IntIntFunction`	`compare`	Function that returns `a < b ? -1 : a > b ? 1 : 0`.
`static IntFunction`	`dec`	Function that returns `a--`.
`static IntIntFunction`	`div`	Function that returns `a / b`.
`static IntIntFunction`	`equals`	Function that returns `a == b ? 1 : 0`.
`static IntFunction`	`factorial`	Function that returns `(int) Arithmetic.factorial(a)`.
`static IntFunction`	`identity`	Function that returns its argument.
`static IntFunction`	`inc`	Function that returns `a++`.
`static IntFunctions`	`intFunctions`	Little trick to allow for "aliasing", that is, renaming this class.
`static IntIntProcedure`	`isEqual`	Function that returns `a == b`.
`static IntIntProcedure`	`isGreater`	Function that returns `a > b`.
`static IntIntProcedure`	`isLess`	Function that returns `a < b`.
`static IntIntFunction`	`max`	Function that returns `Math.max(a,b)`.
`static IntIntFunction`	`min`	Function that returns `Math.min(a,b)`.
`static IntIntFunction`	`minus`	Function that returns `a - b`.
`static IntIntFunction`	`mod`	Function that returns `a % b`.
`static IntIntFunction`	`mult`	Function that returns `a * b`.
`static IntFunction`	`neg`	Function that returns `-a`.
`static IntFunction`	`not`	Function that returns `~a`.
`static IntIntFunction`	`or`	Function that returns `a \| b`.
`static IntIntFunction`	`plus`	Function that returns `a + b`.
`static IntIntFunction`	`pow`	Function that returns `(int) Math.pow(a,b)`.
`static IntIntFunction`	`shiftLeft`	Function that returns `a << b`.
`static IntIntFunction`	`shiftRightSigned`	Function that returns `a >> b`.
`static IntIntFunction`	`shiftRightUnsigned`	Function that returns `a >>> b`.
`static IntFunction`	`sign`	Function that returns `a < 0 ? -1 : a > 0 ? 1 : 0`.
`static IntFunction`	`square`	Function that returns `a * a`.
`static IntIntFunction`	`xor`	Function that returns `a ^ b`.

Constructor Summary

Constructors
Modifier Constructor Description

protected IntFunctions()
Makes this class non instantiable, but still let's others inherit from it.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static IntFunction`	`and(int b)`	Constructs a function that returns `a & b`.
`static IntFunction`	`between(int from, int to)`	Constructs a function that returns `(from<=a && a<=to) ? 1 : 0`.
`static IntFunction`	`bindArg1(IntIntFunction function, int c)`	Constructs a unary function from a binary function with the first operand (argument) fixed to the given constant `c`.
`static IntFunction`	`bindArg2(IntIntFunction function, int c)`	Constructs a unary function from a binary function with the second operand (argument) fixed to the given constant `c`.
`static IntFunction`	`chain(IntFunction g, IntFunction h)`	Constructs the function `g( h(a) )`.
`static IntIntFunction`	`chain(IntFunction g, IntIntFunction h)`	Constructs the function `g( h(a,b) )`.
`static IntIntFunction`	`chain(IntIntFunction f, IntFunction g, IntFunction h)`	Constructs the function `f( g(a), h(b) )`.
`static IntFunction`	`compare(int b)`	Constructs a function that returns `a < b ? -1 : a > b ? 1 : 0`.
`static IntFunction`	`constant(int c)`	Constructs a function that returns the constant `c`.
`static IntFunction`	`div(int b)`	Constructs a function that returns `a / b`.
`static IntFunction`	`equals(int b)`	Constructs a function that returns `a == b ? 1 : 0`.
`static IntProcedure`	`isBetween(int from, int to)`	Constructs a function that returns `from<=a && a<=to`.
`static IntProcedure`	`isEqual(int b)`	Constructs a function that returns `a == b`.
`static IntProcedure`	`isGreater(int b)`	Constructs a function that returns `a > b`.
`static IntProcedure`	`isLess(int b)`	Constructs a function that returns `a < b`.
`static IntFunction`	`max(int b)`	Constructs a function that returns `Math.max(a,b)`.
`static IntFunction`	`min(int b)`	Constructs a function that returns `Math.min(a,b)`.
`static IntFunction`	`minus(int b)`	Constructs a function that returns `a - b`.
`static IntFunction`	`mod(int b)`	Constructs a function that returns `a % b`.
`static IntFunction`	`mult(int b)`	Constructs a function that returns `a * b`.
`static IntFunction`	`or(int b)`	Constructs a function that returns `a \| b`.
`static IntFunction`	`plus(int b)`	Constructs a function that returns `a + b`.
`static IntFunction`	`pow(int b)`	Constructs a function that returns `(int) Math.pow(a,b)`.
`static IntFunction`	`random()`	Constructs a function that returns a 32 bit uniformly distributed random number in the closed interval `[Integer.MIN_VALUE,Integer.MAX_VALUE]` (including `Integer.MIN_VALUE` and `Integer.MAX_VALUE`).
`static IntFunction`	`shiftLeft(int b)`	Constructs a function that returns `a << b`.
`static IntFunction`	`shiftRightSigned(int b)`	Constructs a function that returns `a >> b`.
`static IntFunction`	`shiftRightUnsigned(int b)`	Constructs a function that returns `a >>> b`.
`static IntIntFunction`	`swapArgs(IntIntFunction function)`	Constructs a function that returns `function.apply(b,a)`, i.e.
`static IntFunction`	`xor(int b)`	Constructs a function that returns `a \| b`.

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

- Field Detail
  - intFunctions
```
public static final IntFunctions intFunctions
```
    Little trick to allow for "aliasing", that is, renaming this class. Writing code like
    IntFunctions.chain(IntFunctions.plus,IntFunctions.mult(3),IntFunctions.chain(IntFunctions.square,IntFunctions.div(2)));
    is a bit awkward, to say the least. Using the aliasing you can instead write
    IntFunctions F = IntFunctions.intFunctions; F.chain(F.plus,F.mult(3),F.chain(F.square,F.div(2)));
  - abs
```
public static final IntFunction abs
```
    Function that returns Math.abs(a) == (a < 0) ? -a : a.
  - dec
```
public static final IntFunction dec
```
    Function that returns a--.
  - factorial
```
public static final IntFunction factorial
```
    Function that returns (int) Arithmetic.factorial(a).
  - identity
```
public static final IntFunction identity
```
    Function that returns its argument.
  - inc
```
public static final IntFunction inc
```
    Function that returns a++.
  - neg
```
public static final IntFunction neg
```
    Function that returns -a.
  - not
```
public static final IntFunction not
```
    Function that returns ~a.
  - sign
```
public static final IntFunction sign
```
    Function that returns a < 0 ? -1 : a > 0 ? 1 : 0.
  - square
```
public static final IntFunction square
```
    Function that returns a * a.
  - and
```
public static final IntIntFunction and
```
    Function that returns a & b.
  - compare
```
public static final IntIntFunction compare
```
    Function that returns a < b ? -1 : a > b ? 1 : 0.
  - div
```
public static final IntIntFunction div
```
    Function that returns a / b.
  - equals
```
public static final IntIntFunction equals
```
    Function that returns a == b ? 1 : 0.
  - isEqual
```
public static final IntIntProcedure isEqual
```
    Function that returns a == b.
  - isLess
```
public static final IntIntProcedure isLess
```
    Function that returns a < b.
  - isGreater
```
public static final IntIntProcedure isGreater
```
    Function that returns a > b.
  - max
```
public static final IntIntFunction max
```
    Function that returns Math.max(a,b).
  - min
```
public static final IntIntFunction min
```
    Function that returns Math.min(a,b).
  - minus
```
public static final IntIntFunction minus
```
    Function that returns a - b.
  - mod
```
public static final IntIntFunction mod
```
    Function that returns a % b.
  - mult
```
public static final IntIntFunction mult
```
    Function that returns a * b.
  - or
```
public static final IntIntFunction or
```
    Function that returns a | b.
  - plus
```
public static final IntIntFunction plus
```
    Function that returns a + b.
  - pow
```
public static final IntIntFunction pow
```
    Function that returns (int) Math.pow(a,b).
  - shiftLeft
```
public static final IntIntFunction shiftLeft
```
    Function that returns a << b.
  - shiftRightSigned
```
public static final IntIntFunction shiftRightSigned
```
    Function that returns a >> b.
  - shiftRightUnsigned
```
public static final IntIntFunction shiftRightUnsigned
```
    Function that returns a >>> b.
  - xor
```
public static final IntIntFunction xor
```
    Function that returns a ^ b.
- Constructor Detail
  - IntFunctions
```
protected IntFunctions()
```
    Makes this class non instantiable, but still let's others inherit from it.
- Method Detail
  - and
```
public static IntFunction and(int b)
```
    Constructs a function that returns a & b. a is a variable, b is fixed.
  - between
```
public static IntFunction between(int from,
                                  int to)
```
    Constructs a function that returns (from<=a && a<=to) ? 1 : 0. a is a variable, from and to are fixed.
  - bindArg1
```
public static IntFunction bindArg1(IntIntFunction function,
                                   int c)
```
    Constructs a unary function from a binary function with the first operand (argument) fixed to the given constant c. The second operand is variable (free).
    
    Parameters:
    
    function - a binary function taking operands in the form function.apply(c,var).
    
    Returns:
    
    the unary function function(c,var).
  - bindArg2
```
public static IntFunction bindArg2(IntIntFunction function,
                                   int c)
```
    Constructs a unary function from a binary function with the second operand (argument) fixed to the given constant c. The first operand is variable (free).
    
    Parameters:
    
    function - a binary function taking operands in the form function.apply(var,c).
    
    Returns:
    
    the unary function function(var,c).
  - chain
```
public static IntFunction chain(IntFunction g,
                                IntFunction h)
```
    Constructs the function g( h(a) ).
    
    Parameters:
    
    g - a unary function.
    
    h - a unary function.
    
    Returns:
    
    the unary function g( h(a) ).
  - chain
```
public static IntIntFunction chain(IntFunction g,
                                   IntIntFunction h)
```
    Constructs the function g( h(a,b) ).
    
    Parameters:
    
    g - a unary function.
    
    h - a binary function.
    
    Returns:
    
    the unary function g( h(a,b) ).
  - chain
```
public static IntIntFunction chain(IntIntFunction f,
                                   IntFunction g,
                                   IntFunction h)
```
    Constructs the function f( g(a), h(b) ).
    
    Parameters:
    
    f - a binary function.
    
    g - a unary function.
    
    h - a unary function.
    
    Returns:
    
    the binary function f( g(a), h(b) ).
  - compare
```
public static IntFunction compare(int b)
```
    Constructs a function that returns a < b ? -1 : a > b ? 1 : 0. a is a variable, b is fixed.
  - constant
```
public static IntFunction constant(int c)
```
    Constructs a function that returns the constant c.
  - div
```
public static IntFunction div(int b)
```
    Constructs a function that returns a / b. a is a variable, b is fixed.
  - equals
```
public static IntFunction equals(int b)
```
    Constructs a function that returns a == b ? 1 : 0. a is a variable, b is fixed.
  - isBetween
```
public static IntProcedure isBetween(int from,
                                     int to)
```
    Constructs a function that returns from<=a && a<=to. a is a variable, from and to are fixed.
  - isEqual
```
public static IntProcedure isEqual(int b)
```
    Constructs a function that returns a == b. a is a variable, b is fixed.
  - isGreater
```
public static IntProcedure isGreater(int b)
```
    Constructs a function that returns a > b. a is a variable, b is fixed.
  - isLess
```
public static IntProcedure isLess(int b)
```
    Constructs a function that returns a < b. a is a variable, b is fixed.
  - max
```
public static IntFunction max(int b)
```
    Constructs a function that returns Math.max(a,b). a is a variable, b is fixed.
  - min
```
public static IntFunction min(int b)
```
    Constructs a function that returns Math.min(a,b). a is a variable, b is fixed.
  - minus
```
public static IntFunction minus(int b)
```
    Constructs a function that returns a - b. a is a variable, b is fixed.
  - mod
```
public static IntFunction mod(int b)
```
    Constructs a function that returns a % b. a is a variable, b is fixed.
  - mult
```
public static IntFunction mult(int b)
```
    Constructs a function that returns a * b. a is a variable, b is fixed.
  - or
```
public static IntFunction or(int b)
```
    Constructs a function that returns a | b. a is a variable, b is fixed.
  - plus
```
public static IntFunction plus(int b)
```
    Constructs a function that returns a + b. a is a variable, b is fixed.
  - pow
```
public static IntFunction pow(int b)
```
    Constructs a function that returns (int) Math.pow(a,b). a is a variable, b is fixed.
  - random
```
public static IntFunction random()
```
    Constructs a function that returns a 32 bit uniformly distributed random number in the closed interval [Integer.MIN_VALUE,Integer.MAX_VALUE] (including Integer.MIN_VALUE and Integer.MAX_VALUE). Currently the engine is MersenneTwister and is seeded with the current time.
    Note that any random engine derived from RandomEngine and any random distribution derived from AbstractDistribution are function objects, because they implement the proper interfaces. Thus, if you are not happy with the default, just pass your favourite random generator to function evaluating methods.
  - shiftLeft
```
public static IntFunction shiftLeft(int b)
```
    Constructs a function that returns a << b. a is a variable, b is fixed.
  - shiftRightSigned
```
public static IntFunction shiftRightSigned(int b)
```
    Constructs a function that returns a >> b. a is a variable, b is fixed.
  - shiftRightUnsigned
```
public static IntFunction shiftRightUnsigned(int b)
```
    Constructs a function that returns a >>> b. a is a variable, b is fixed.
  - swapArgs
```
public static IntIntFunction swapArgs(IntIntFunction function)
```
    Constructs a function that returns function.apply(b,a), i.e. applies the function with the first operand as second operand and the second operand as first operand.
    
    Parameters:
    
    function - a function taking operands in the form function.apply(a,b).
    
    Returns:
    
    the binary function function(b,a).
  - xor
```
public static IntFunction xor(int b)
```
    Constructs a function that returns a | b. a is a variable, b is fixed.

Class IntFunctions

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

intFunctions

abs

dec

factorial

identity

inc

neg

not

sign

square

and

compare

div

equals

isEqual

isLess

isGreater

max

min

minus

mod

mult

or

plus

pow

shiftLeft

shiftRightSigned

shiftRightUnsigned

xor

Constructor Detail

IntFunctions

Method Detail

and

between

bindArg1

bindArg2

chain

chain

chain

compare

constant

div

equals

isBetween

isEqual

isGreater

isLess

max

min

minus

mod

mult

or

plus

pow

random

shiftLeft

shiftRightSigned

shiftRightUnsigned

swapArgs

xor