text: // like underscore/lodash _.pick()
  function pick(obj, arr) {
    var res = {};
    for (var i = 0, len = arr.length; i < len; i++) {
      var prop = arr[i];
      if (prop in obj) {
        res[prop] = obj[prop];
      }
    }
    return res;
  }
  
  export default pick;
  