【每日一题20220303】双倍字符

兴趣爱好交流 每日一题
1

:mage:t2: 给定一个字符串，将它们其中的每个字符（区分大小写）再重复一次。

示例：
输入："Hogwarts"，输出："HHooggwwaarrttss"

题目难度：简单
题目来源：CodeWar：Double Char

def solution(words: str) -> str:
    # your code here

assert solution("Hogwarts") == "HHooggwwaarrttss"
assert solution("String") == "SSttrriinngg"
assert solution("1234!_ ") == "11223344!!__  "
2 
return ''.join(i * 2 for i in words)
5 
def solution(words: str) -> str:
    s = ""
    for i in words:
        s += i*2
    return s


assert solution("Hogwarts") == "HHooggwwaarrttss"
assert solution("String") == "SSttrriinngg"
assert solution("1234!_ ") == "11223344!!__  "
6 
def solution(words: str) -> str:
    return ''.join([words[i]*2 for i in range(len(words))])

assert solution("Hogwarts") == "HHooggwwaarrttss"
assert solution("String") == "SSttrriinngg"
assert solution("1234!_ ") == "11223344!!__  "