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