pick对象key/value

gistfile1.txt

const pick = (obj, keys) => {
  return keys.filter(key => obj.hasOwnProperty(key)).reduce((preValue, key) => {
    preValue[key] = obj[key];
    return preValue;
  }, {});
};

// var o = {
//   a: 1,
//   b: 2,
//   c: 3
// };
// const result = pick(o, ["a", "c"]);
// console.log("测试pick > ", o, result);
// 测试pick >  {a: 1, b: 2, c: 3}  >  {a: 1, c: 3}

export default pick;