LeetCode-面试题05-替换空格

输入：s = "We are happy."
输出："We%20are%20happy."

class Solution {
    public String replaceSpace(String s) {
        StringBuilder result = new StringBuilder();
        for (char i : s.toCharArray()) {
            if (i == ' ') {
                result.append("%20");
            } else
                result.append(i);
        }
        return result.toString();
    }
}

class Solution(object):
    def replaceSpace(self, s):
        """
        :type s: str
        :rtype: str
        """
        return ''.join(('%20' if c == ' ' else c for c in s))