LeetCode 75 1768. 交替合并字符串

原题

LeetCode 75 1768. 交替合并字符串

思路

代码

func mergeAlternately(word1 string, word2 string) string {
    m := strings.Count(word1, "") - 1
    n := strings.Count(word2, "") - 1
    var ans string = ""
    i := 0
    for ; i < m && i < n; i++ {
        ans += string(word1[i])
        ans += string(word2[i])
    }
    for ; i < m; i++ {
        ans += string(word1[i])
    }
    for ; i < n; i++ {
        ans += string(word2[i])
    }
    return ans
}

func mergeAlternately(word1 string, word2 string) string {
    m, n := len(word1), len(word2)
    ans := make([]byte, 0, m + n)
    for i := 0; i < m || i < n; i++ {
        if i < m {
            ans = append(ans, word1[i])
        }
        if i < n {
            ans = append(ans, word2[i])
        }
    }
    return string(ans)
}

运行截图

收获

• m, n := len(word1), len(word2)
• ans := make([]byte, 0, m + n)
• ans = append(ans, word1[i])
• string(ans)