map key and value javascript code example

Example 1: map dictionary javascript

var myObject = { 'a': 1, 'b': 2, 'c': 3 };

Object.keys(myObject).map(function(key, index) {
  myObject[key] *= 2;
});

// { 'a': 2, 'b': 4, 'c': 6 }

Example 2: javascript map ket to value

m.set('color', 'red')
m.set('age', 2)