transKeys.js

/**
 * Transfrom the keys of an object by an filter object, then return a new object.
 * ToDo: support deep transforming.
 */
function transKeys(src, filter) {
  var dest = {};
  var keys = Object.keys(filter);

  for (var p in src) {
    if (src.hasOwnProperty(p)) {
      var key = keys.indexOf(p) > -1 ? filter[p] : p;
      dest[key] = src[p];
    }
  }
  
  return dest;
}