How to convert a associative array into a sorted string array?

Question

How can I convert this js object

 var obj1 =  {"user1":28, "user2":87, "user3":56};

into a string array, sorted by value, like so:

["user2","user3","user1"]

var sortedKeys = Object.keys(obj1).sort(); in modern browsers. — Pointy
– Pointy, Commented May 25, 2015 at 14:41
@Pointy will that not sort the keys by their name and not their value? — Luke
– Luke, Commented May 25, 2015 at 14:44
@Luke oh oh I see; right, the .sort() would need a comparator for that. — Pointy
– Pointy, Commented May 25, 2015 at 15:04

n-dru · Accepted Answer · 2015-05-25 14:46:52Z

10

Use this:

var obj1 =  {"user1":28, "user2":87, "user3":56};
var a = Object.keys(obj1).sort(function(x,y){return obj1[y]-obj1[x]})
console.log(a);

Output:

["user2", "user3", "user1"]

answered May 25, 2015 at 14:41

n-dru

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