math-permutation(数学排列)

Install

npm i math-permutation --save

Usage

var permutation = require('math-permutation')
var arr = [1, 2, 3]

//Get all conditions that conbine two element of the the arr(different order different condition)
permutation.amn(arr, 2)

//Get all conditions that conbine two element of the the arr(different order different condition and element can repeat)
permutation.amnWithRepetition(arr, 2)

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Note

Only support for array of String or Number

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See test for more details