Flatten an object using JavaScript

flattenobject.js

/* 
  Given an input object 
  var obj = {
	  a: {
	  	b: 1,
	  	c: 1,
	  	d: {
			e: 1,
		  	f: 1
	  	}
	  },
	  g: 2,
	  h: {
  		i: 2,
  		j: 3
	  }
  };
 Flatten it so that the output is
 newObj = {
  a: 3
  b: 1
  c: 1
  d: 2
  e: 1
  f: 1
  g: 2
  h: 2
  i: 2
  j: 3
 }
*/

var newObj = {};
function flatten(obj) {
	for(var key in obj) {
		if(typeof obj[key] === 'object') { //key is an object, so process again
			newObj[key] = Object.keys(obj[key]).length;
			flatten(obj[key]);
		} else {
			newObj[key] = obj[key]; //primitive value, just copy
        }
	}
}