How to remove duplicates from an array in JavaScript? The most efficient ways

Hello everyone! I'm a beginner in JavaScript and I've encountered a task: I have an array with numbers that has many duplicate values. I need to keep only unique elements. For example, I have an array `[1, 2, 2, 3, 4, 4, 5]`, and I want to get `[1, 2, 3, 4, 5]` as output. I tried writing my own function, but it doesn't work correctly — it either doesn't remove all duplicates or breaks the array entirely. Here's my code: ```javascript function removeDuplicates(arr) { for (let i = 0; i < arr.length; i++) { for (let j = i + 1; j < arr.length; j++) { if (arr[i] === arr[j]) { arr.splice(j, 1); } } } return arr; } ``` The problem is that after `splice`, the indices shift, and I skip some elements. Plus, I think this is