Object.entries() 转换对象为数组
var o = {a:15,b:26,c:37},
d = Object.entries(o); //result [["a", 15],["b", 26],["c", 37]]
Object.fromEntries()转换数组为对象
var e = Object.fromEntries(d); //result {a:15,b:26,c:37}
var o = {a:15,b:26,c:37},
d = Object.entries(o); //result [["a", 15],["b", 26],["c", 37]]
var e = Object.fromEntries(d); //result {a:15,b:26,c:37}