一趣倾、題目描述
請(qǐng)實(shí)現(xiàn)一個(gè)函數(shù)，將一個(gè)字符串中的每個(gè)空格替換成“%20”丸逸。例如笋籽，當(dāng)字符串為We Are Happy.則經(jīng)過替換之后的字符串為We%20Are%20Happy。
二椭员、代碼實(shí)現(xiàn)
方法一车海、書上的方法
# -*- coding:utf-8 -*-
class Solution:
# s 源字符串
def replaceSpace(self, s):
# write code here
spacenumber = 0
for char in s:
if char == ' ': spacenumber = spacenumber + 1
result_len = len(s) + spacenumber * 3
new_s = ['' for i in range(result_len)]
for char in s[::-1]:
if char == " ":
new_s[result_len-2:result_len] = "%20"
result_len = result_len - 3
else:
new_s[result_len-1] = char
result_len = result_len - 1
return ''.join(new_s)
方法二、python技巧
# -*- coding:utf-8 -*-
class Solution:
# s 源字符串
def replaceSpace(self, s):
# write code here
s = s.replace(" ", "%20")
return s
