Convert ES6 Map to Object Literal

es6-map-to-object-literal.js

let map = new Map();
map.set("a", 1);
map.set("b", 2);
map.set("c", 3);

let obj = Array.from(map).reduce((obj, [key, value]) => (
  Object.assign(obj, { [key]: value }) // Be careful! Maps can have non-String keys; object literals can't.
), {});

console.log(obj); // => { a: 1, b: 2, c: 3 }

Instead of converting the map -> array -> iterating over array / filling in new object

Could you do this?

const convertMapsToObjects = (mapInstance) => {
  const obj = {};
  for(let prop of map){
    obj[prop[0]] = prop[1];
  }
 return obj;
}

http://jsben.ch/mGhq1