array-flatten

.gitignore

/node_modules
*.log
.DS_Store

.nvmrc

v4.3.1

.travis.yml

language: node_js

README.md

#array-flatten

Will flatten an array of arbitrarily nested arrays of integers into a flat array of integers.

$ nvm use
$ npm install
$ npm test

fixtures.json

{
  "simple": [
    [ 1, [ 2, 3 ] ],
    [ 1, 2, 3 ]
  ],
  "citrus": [
    [ [ 1, 2, [ 3 ] ], 4 ],
    [ 1, 2, 3, 4 ]
  ],
  "flat": [
    5,
    [ 5 ]
  ],
  "empty": [
    [],
    []
  ],
  "rabbit-hole": [
    [ [ [] ] ],
    []
  ]
}

index.js

"use strict";

let lib = (input, output) => {
  if (Array.isArray(input)) {
    for (let i of input) lib(i, output);
  } else {
    output.push(input);
  }

  return output;
};

module.exports = (input) => lib(input, []);

package.json

{
  "name": "array-flatten",
  "version": "1.0.0",
  "author": "Radek Stepan <dev@radekstepan.com>",
  "main": "index.js",
  "devDependencies": {
    "chai": "^3.5.0",
    "mocha": "^2.4.5"
  },
  "scripts": {
    "test": "./node_modules/.bin/mocha test.js --ui exports --bail --reporter spec"
  }
}

test.js

"use strict";

let assert = require('chai').assert;

let lib = require('./index.js');
let fix = require('./fixtures.json');

for (let i in fix) {
  exports[`test ${i}`] = (done) => {
    assert.deepEqual(lib(fix[i][0]), fix[i][1]);
    done();
  };
}