const unsortedArray = [123, 49, 7, 333]

const radix = (arr) => {
  const max = Math.max(...arr).toString().length
  const buckets = new Array(10)
  let arrayWithLeftPaddedZeros = []

  for (let i = 0; i < arr.length; i++) {
    arrayWithLeftPaddedZeros[i] = arr[i].toString().padStart(max, '0')
  }

  for (let i = 0; i < arrayWithLeftPaddedZeros.length; i++) {
    let j = 2
    //for (let j = max - 1; j >= 0; j--) {
      if (!buckets[arrayWithLeftPaddedZeros[i][j]]) {
        buckets[arrayWithLeftPaddedZeros[i][j]] = []
      }

      buckets[arrayWithLeftPaddedZeros[i][j]].push(arrayWithLeftPaddedZeros[i])
//    }
  }

  const a = [...buckets]

  console.log(buckets.toString())
}

radix(unsortedArray)