Get array of array numbers

Question

I have an array like this one:

let array = [14, 42, 1, 3]

And I would like to get the arrays number mapped to this:

[1, 0, 3, 2]

Here is the reason:

• 1: because 14 is the second biggest number
• 0: because 42 is the biggest number
• 3: ...

What I have tried so far:

let sort = (array) => {
  let result = []
  let x = array.slice(0).sort((a, b) => b - a)
  for (let elem of x) {
    result.push(array.indexOf(elem))
  }
  console.log(result)
}

// Working
sort([14, 42, 1, 3]) // [1, 0, 3, 2]

// Not working, includes the index "0" two times
sort([14, 42, 14, 3]) // [1, 0, 0, 3]
// Expected: [1, 0, 2, 3]

Answer 1

You could take the indices and sort them by taking the value from the given array.

const sort = array => [...array.keys()].sort((a, b) => array[b] - array[a]);

console.log(sort([14, 42, 1, 3]));
console.log(sort([14, 42, 14, 3]));