Objects diff util

odiff.js

/**
 * Objects diff util
 * @param object a object to compare
 * @param object b object to compare
 * @return the difference between the two objects
 */
(function() {
  odiff = function(a, b) {
    var $this = this;
    var result = {};

    var ref = _.merge(null, a, b);

    _.forEach(ref, function(value, key) {
      if (_.isEqual(a[key], b[key])) {
        return;
      }
      if (_.isObject(a[key]) && _.isObject(b[key])) {
        _.forEach($this.odiff(a[key], b[key]), function(v, k) {
          result[key + '.' + k] = v;
        });
      } else {
        result[key] = [a[key], b[key]];
      }
    });
    return result;
  };
})();