27 delete elements

27.移除元素

cpp：

class Solution {
public:
    int removeElement(vector<int>& nums, int val)
    {
        int slow = 0; //创建慢指针

        for (int fast = 0; fast < nums.size(); fast++)
        {
            if (nums[fast] != val) //快指针先遍历
            {
                nums[slow] = nums[fast]; //如果没找到要删除的，就赋值并右移慢指针
                slow++;
            }
        }

        return slow;
    }
};

go：

func removeElement(nums []int, val int) int {
    slow := 0

    for fast := 0; fast < len(nums); fast++ {
        if nums[fast] != val {
            nums[slow] = nums[fast]
            slow++
        }
    }

    return slow
}