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Created Dec 13, 2016
What would you like to do?
flatten a nested array
// function definition ES6
let flatten = (arr, res=[]) => {
for(let itm of arr){
Array.isArray(itm)? flatten(itm, res): res.push(itm);
// calling the function
let result = [];
flatten([1,2, [3, 4], [5, [6, 7, [8, 9]]]], result);
// PS: I think a better solution will be to use lodash.flatten though :p
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