Let say I have an object with numbers as key and string as value
var obj = { '24': 'Sean', '17': 'Mary', '88': 'Andrew', '46': 'Kelvin' } Is there an easy way to sort the keys into an array based on their value where the result will looks like this:
[88,46,17,24] Here's one way to do it:
var obj = { '24': 'Sean', '17': 'Mary', '88': 'Andrew', '46': 'Kelvin' } var sortedKeys = Object.keys(obj).sort(function(a, b) { return obj[a].localeCompare(obj[b]); }).map(Number) console.log(sortedKeys)Omit the .map() part if you are happy for the result to be an array of strings rather than numbers.
Further reading:
Or the same thing but with ES6 arrow functions:
const sortedKeys = Object.keys(obj) .sort((a, b) => obj[a].localeCompare(obj[b])) .map(Number) 
.map() I happened to notice the strings in the output. I notice that other than that you independently came up with exactly the same thing except with arrow functions, which is certainly a lot neater assuming they're acceptable to the OP. Given that you deleted that answer I might add arrow functions to mine..map(Number)