Sort an array of strings and numbers, but keeping the position of where strings or numbers appear in the original array

number-string-sort.js

const arr = [
  'tree', 'zebra', 40, 'y', 5000, 8, 14, 'zzzzz', 1, 'a', 'bbbbb'
];

let numbers_pos = [];
let words_pos = [];
let words_slots = [], numbers_slots = [];

arr.forEach((val, i) => {
  if (typeof val == 'string') {
    words_pos[i] = val;
    words_slots.push(i);
  } else {
    numbers_pos[i] = val;
    numbers_slots.push(i);
  }
});

let words = words_pos.filter(val => !!val).sort((a, b) => a.localeCompare(b));
let numbers = numbers_pos.filter(val => !!val).sort((a, b) => a > b ? 1 : (a == b ? 0 : -1));

let sorted = [];

words.forEach((word, i) => {
  let slot = words_slots[i];
  sorted[slot] = word;
});

numbers.forEach((number, i) => {
  let slot = numbers_slots[i];
  sorted[slot] = number;
});

console.log(arr, sorted);