reverse_prefix_word.py (763B)
| # 2000. Reverse Prefix of Word
"""
given a 0-indexed string 'word' and a character 'ch', reverse the segment of
'word' that starts at index 0 and ends at the index of the first occurence of
'ch' (inclusively). if the character 'ch' does not exist in 'word', do
nothing. return the resulting string.
"""
class Solution(object):
def reversePrefix(self, word, ch):
"""
:type word: str
:type ch: str
:rtype: str
"""
idx = word.find(ch)
if idx:
return word[: idx + 1][::-1] + word[idx + 1 :]
return word
if __name__ == "__main__":
obj = Solution()
print(obj.reversePrefix("abcdefd", "d"))
print(obj.reversePrefix("xyxzxe", "z"))
print(obj.reversePrefix("abcd", "z"))
|
