How to sort a object in ascending order by the value of a key in js?

Question

How can sort the values 1,99,1,50 in javascript?

Here is input: var map = {test:1, test2:99, test3:1, test4: 50}

here is the targeted output: {test2:99, test4:50, test3:1, test:1}

Here is what I have tried:

function sortMap(map) {
    var temp = [];
    for(let prop in map) {
        if(map.hasOwnProperty(prop)) {
            temp.push({name:prop, size:map[prop]});
        }
    }
    return temp.sort(function(b, a) {
        return a.size - b.size
    });
}

Your input is the same as your output. And your `sortMap` function returns an array not an object, which however seems to be much more suited to your task. — Bergi, Mar 16 '16 at 08:59
You could make it neater using `Object.keys` and just chaining `map` and `sort` but yea it appears to be working? https://jsfiddle.net/mLmupfLb/ — ste2425, Mar 16 '16 at 09:02
Sorry folks. Duplicate: http://stackoverflow.com/questions/1069666/sorting-javascript-object-by-property-value — РАВИ, Mar 16 '16 at 09:11

score 0 · Answer 1 · answered Mar 16 '16 at 09:02

You cannot actually sort an object's keys, but you can sort the keys and get the values accordingly.

var map = { test: 1, test2: 99, test3: 1, test4: 50 },
    keys = Object.keys(map).sort(function (a, b) { return map[b] - map[a]; });

keys.forEach(function (k) {
    document.write(k + ': ' + map[k] + '<br>');
});

How to sort a object in ascending order by the value of a key in js?

1 Answers1