// Java public int removeDuplicates(int[] nums) { if (nums.length == 0) return 0; int i = 0; for (int j = 1; j < nums.length; j++) { if (nums[j] != nums[i]) { i++; nums[i] = nums[j]; } } return i + 1; }
let chars = ['A', 'B', 'A', 'C', 'B']; let uniqueChars = [...new Set(chars)]; console.log(uniqueChars); output: [ 'A', 'B', 'C' ]