ServiceNow Rhino fail

[andersonk17474]

This is nice little function. I ran into an issue when trying to use this in a server-side environment. This is directed at a tiny user group, but it may help someone. The javascript Rhino engine ServiceNow uses is rather old. Like pre ECMA 3. This function needs an extra check, as the first line checking the object type for param 'a' will not copy an object from 'b' when the key doesn't exist in 'a'.

if ((Object.prototype.toString.call(a[key]) == '[object Object]') && (!a.hasOwnProperty(key))){
       a[key] = extend({}, b[key]);
}
else if (Object.prototype.toString.call(a[key]) != '[object Object]') {
      a[key] = b[key];
 } else {
       a[key] = extend(a[key], b[key]);
  }