How to sort an array efficiently

Question

I\'m trying to sort an array [3,3,2,1,3,2,2,2,1] to [1,1,3,3,3,2,2,2,2].

I\'m trying to handle it using object, using the number as key, and th

Answer 1

You can do this

const sortNums = (arr) => {
    const result = {}

    for (let i = 0; i < arr.length; i++) {
      const num = result[arr[i]] || 0;
      result[arr[i]] = num + 1;
    }

    const a = [];
    for(let i = 0; i <= 9; i++) {
        if(result[i]) {
            a.push(...Array.from({length: result[i]}, x => i));
        }
    }
    return a;
  }