removeDuplicateNumber.ts

function removeDuplicates(nums: number[]): number[] {
    if (nums.length === 0) return [];
    let i=0;
    nums.sort();
    for (let j =1; j < nums.length; j++) {
        if (nums[j] != nums[i]) {
            i++;
            nums[i] = nums[j];
        }
    }
    return nums;
};