JavaScript - 按值排序对象但返回键

Question

I have an Object like this:

object = {A: 15, B: 30, C: 22}

So I'm sorting it using its values. For that, I have this function:

 object = { A: 15, B: 30, C: 22 } function sortObjsValues(obj) { return Object.values(obj).sort((a, b) => { if (a > b) { return -1; } else if (a < b) { return 1; } else { return 0; } }); } console.log(sortObjsValues(object)); // => returns 30,22,15

Is there a way to return its keys instead of its values, keeping sorting by its values? The final result would be B,C,A

Answer 1

You could get entries from the object, sort by value descending and map the keys.

 const object = { A: 15, B: 30, C: 22 }, getSortedKeys = o => Object.entries(o).sort((a, b) => b[1] - a[1]).map(([k]) => k); console.log(getSortedKeys(object));

Answer 2

Just sort the keys by the value.

 const object = { A: 15, B: 30, C: 22 }; console.log(Object.keys(object).sort((a, b) => object[b] - object[a]));