regular explression 썸네일형 리스트형 regular expression ?<= Positive lookaheadpositive lookahead works q(?=u) matches a q that is follwed by a u negative lookahaed works q(?!u) matches a q that is not followed by a u Positive lookbehindLookbehind has the same effect, but works backwards positive lookbehind works(? 더보기 이전 1 다음