挑選對象部分屬性
const pick = (obj, arr) =>
arr.reduce((iter, val) => (val in obj && (iter[val] = obj[val]), iter), {});
挑選對象部分屬性
const pick = (obj, arr) =>
arr.reduce((iter, val) => (val in obj && (iter[val] = obj[val]), iter), {});