jomadoye

//Flatten array
const flatten = (arr) => [].concat.apply([], arr);

//To use 
const arrToFlatten = [
  ["1"],
  ["2"],
  ["3"],
  ["4"]
];

jomadoye

const SingletonPattern = (() => {
  let instantiated;
  let init = () => {
    // singleton
    return {
      publicMethod: () => {
        console.log("hello world");
      },
      publicProperty: "test"