regex lookbehind
# Positive lookahead
q(?=u) # Matches the letter "q" if "q" is followed by the letter "u"
# Negative lookahead
q(?!u) # Matches the letter "q" if "q" is NOT followed by the letter "u"
# Positive lookbehind
(?<=a)b # Matches the letter "b" if "b" is preceded by the letter "a"
# Negative lookbehind
(?<!a)b # Matches the letter "b" if "b" is NOT preceded by the letter "a"regex look behind
(?<=123-)((apple|banana)(?=-456)|(?=456))look behind regex
RegExp to find cat that is followed by dog
cat(?=dog)Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
