1/**
 2 * Merge object b with object a.
 3 *
 4 *     var a = { foo: 'bar' }
 5 *       , b = { bar: 'baz' };
 6 *
 7 *     merge(a, b);
 8 *     // => { foo: 'bar', bar: 'baz' }
 9 *
10 * @param {Object} a
11 * @param {Object} b
12 * @return {Object}
13 * @api public
14 */
15
16exports = module.exports = function(a, b){
17  if (a && b) {
18    for (var key in b) {
19      a[key] = b[key];
20    }
21  }
22  return a;
23};