• 题目要求

  • 思路:

    • 遍历字符串,遇到空格替换
    • 因为字符串s长度可变,所以应用的是while循环,实时更新字符串的长度
  • 残缺代码:
class Solution:    def replaceSpace(self, s: str) -> str:        cur, lenth = 0, len(s)        while cur < lenth:            if s[cur] == " ":                s = s[:cur] + "%20" + s[cur + 1:]            cur += 1            lenth = len(s)        return s