How to match part of the string contains certain word
Question:
I want to be able to match the following texts
top of radio 54 / bottom 27
radio top 54 / bottom 27
The word top can be before or after radio only for the first half of the text (before /). top that appears after / should not be matched.
I tried to use the following pattern that encloses the lookahead for the first half with parentheses.
((?=top).*radiosd{2}s)/D*bottomsd{2}
But it doesn’t work like I expected. Only matches first string, but not second.
Answers:
You may use this regex with a lookahead:
^(?=[^/]*btops)[^/]*radio[^/]+d{2}s+/D*bottoms+d{2}$
RegEx Breakup:
^: Start(?=[^/]*btops): Lookahead to assert presence of word top being present before matching a /. This is to ensure we match word top before / only[^/]*: Match 0 more of any char that is not a /radio: Match radio[^/]+: Match 1+ of any char that is not a /d{2}: Match 2 digitss+: Match 1+ whitespaces/: Match a /D*: Match 0 or more non-digitsbottom: Match bottoms+: Match 1+ whitespaced{2}: Match 2 digits$: End
I want to be able to match the following texts
top of radio 54 / bottom 27
radio top 54 / bottom 27
The word top can be before or after radio only for the first half of the text (before /). top that appears after / should not be matched.
I tried to use the following pattern that encloses the lookahead for the first half with parentheses.
((?=top).*radiosd{2}s)/D*bottomsd{2}
But it doesn’t work like I expected. Only matches first string, but not second.
You may use this regex with a lookahead:
^(?=[^/]*btops)[^/]*radio[^/]+d{2}s+/D*bottoms+d{2}$
RegEx Breakup:
^: Start(?=[^/]*btops): Lookahead to assert presence of wordtopbeing present before matching a/. This is to ensure we match wordtopbefore/only[^/]*: Match 0 more of any char that is not a/radio: Matchradio[^/]+: Match 1+ of any char that is not a/d{2}: Match 2 digitss+: Match 1+ whitespaces/: Match a/D*: Match 0 or more non-digitsbottom: Matchbottoms+: Match 1+ whitespaced{2}: Match 2 digits$: End