Swap Array

Swap position of two items in array without changing the state of the passed array.

Install

$ npm install swap-array --save

Usage

// Import with ES6
import SwapArray from 'swap-array';

// Import with ES5
var SwapArray = require('swap-array').default;

var SomeArray = ['thats','cool','dude'];

SwapArray(SomeArray, 0, 2);
// returns:
// ['dude','thats','cool'];

// and 'SomeArray' is still:
// ['thats','cool','dude'];

Does it change the passed array?

Nope, before it changes the positioning we clone the passed array and return just the new instance. Ideal for e.g. some redux-reducer where it's not allowed to change an existing state. If you want that the origin-array changes his state checkout the array-swap repo from Marko Jankovic.

Benchmark

1,149,543 op/s

Contribute

// Run and Watch tests
$ npm run test -- -w

// Just run tests
$ npm run test

// Create new build
$ npm run build

// Run benchmark
$ npm run bench