给object排序

object-sort.js

// by value
var list       = {"you": 100, "me": 75, "foo": 116, "bar": 15};
var keysSorted = Object.keys(list).sort(function (a, b) {
    return list[a] - list[b]
});

console.log(keysSorted);

// by key
var list       = {100: "you", 75: "me", 116: "foo", 15: "bar"};
var keysSorted = Object.keys(list)
    .sort(function (a, b) {
        return a - b;
    })
    .map(function (v) {
        return list[v]
    });

console.log(keysSorted);