Method merge

88. Merge Sorted Array/src/main.rs:7–21

(nums1: &mut Vec<i32>, m: i32, nums2: &mut Vec<i32>, n: i32)

impl Solution {
    pub fn merge(nums1: &mut Vec<i32>, m: i32, nums2: &mut Vec<i32>, n: i32) {
        let (m, n) = (m as usize, n as usize);
        let mut buffer = Vec::<i32>::with_capacity(m + n);
        let (mut i, mut j) = (0, 0);
        while i < m || j < n {
            if j == n || (i < m && nums1[i] <= nums2[j]) {
                buffer.push(nums1[i]);
                i += 1;
            } else {
                buffer.push(nums2[j]);
                j += 1;
            }
        }
        *nums1 = buffer;    // move into nums1
    }
}

struct Solution {}