nv-array-combo

nv-array-combo
============
- nv-array-combo
- a very simple tool for combination and permutation

install
=======
- npm install nv-array-combo

usage
=====

example
-------

const ary_com = require("nv-array-combo")
var arr = ['a','b','c']
var g = ary_com.comb(arr)
g.next().value
//[]
g.next().value
//[ 'a' ]
g.next().value
//[ 'b' ]
g.next().value
//[ 'a', 'b' ]
var g = ary_com.comb(arr)
Array.from(g).sort()
/*
[
[],
[ 'a' ],
[ 'a', 'b' ],
[ 'a', 'b', 'c' ],
[ 'a', 'c' ],
[ 'b' ],
[ 'b', 'c' ],
[ 'c' ]
]
*/

var arr =["a","b","c"]
var g = ary_com.perm(arr)
/*
> g.next()
{ value: [ 'a', 'b', 'c' ], done: false }
> g.next()
{ value: [ 'a', 'c', 'b' ], done: false }
> g.next()
{ value: [ 'b', 'a', 'c' ], done: false }
> g.next()
{ value: [ 'c', 'a', 'b' ], done: false }
> g.next()
{ value: [ 'b', 'c', 'a' ], done: false }
> g.next()
{ value: [ 'c', 'b', 'a' ], done: false }
> g.next()
{ value: undefined, done: true }

*/
var g = ary_com.perm(arr)
Array.from(g)
/*
[
[ 'a', 'b', 'c' ],
[ 'a', 'c', 'b' ],
[ 'b', 'a', 'c' ],
[ 'c', 'a', 'b' ],
[ 'b', 'c', 'a' ],
[ 'c', 'b', 'a' ]
]
*/

API
====

- ary\_com.comb(arr)
- ary\_com.perm(arr)

LICENSE
=======
- ISC