I have a simple typed dictionary:

let frecuencies: {[price: number]: number } = {};

I need to get the keys, sort them in a numberical way and run through them in a loop taking into acount that the type of the keys is number:

let keys = Object.keys(frecuencies);
keys = keys.sort();

This obvioulsy doesn't work because Object.keys returns an array of strings. I know I could pass a function to the sort function to sort in a numerical way, but is there any way to keep the keys typing when getting the keys? Something like this:

let keys: number[] = Object.keys<number>(frecuencies);

Does exist something like that?