JavaScript: Remove duplicates from array without using any shortcut methods

let arr = [2, 1, 3, 1, 7, 1, 7, 9, 3]; function removeDuplicates(arr) { let obj = {}; let arrWithNoDuplicates = []; for (let i = 0; i < arr.length; i++) { obj[arr[i]] = true; } for (let key in obj) { arrWithNoDup...