hirondelle.formula.function.builtin
Class Permutation

Object
  hirondelle.formula.function.builtin.Permutation

All Implemented Interfaces:

Function

public final class Permutation
extends Object
implements Function

permutation(n,k): the number of permutations, selecting k of n. Returns the number of ways you can select k items from an underlying set of n items.

Constructor Summary

Permutation()

Method Summary

Decimal

calculate(Decimal... aArgs) Takes two parameters n and k (in that order).

Methods inherited from class Object

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

Constructor Detail

Permutation

public Permutation()

Method Detail

calculate

public Decimal calculate(Decimal... aArgs)

Takes two parameters n and k (in that order). Both are integers greater than 0, with n >= k.

Specified by:

calculate in interface Function

Parameters:

aArgs - 0 or more arguments to the function.