LoDash Playground

by Sergei Marochkin

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.9.0/lodash.min.js"></script>

JavaScript

var o1 = { a:12, b:8, c:17 };
var o2 = { a:2, b:3, c:1 };

var result = _.mergeWith(o1, o2, function(objValue, srcValue) {
  return _.isNumber(objValue) ? objValue + srcValue : srcValue; 
});

console.log(result);