Flatten an array of nested arrays into a single flat array.
npm install array-flatten --save var flatten = require('array-flatten'); flatten([1, [2, [3, [4, [5], 6], 7], 8], 9]); //=> [1, 2, 3, 4, 5, 6, 7, 8, 9] flatten([1, [2, [3, [4, [5], 6], 7], 8], 9], 2); //=> [1, 2, 3, [4, [5], 6], 7, 8, 9]MIT
