regex-group Archives

Programming, regex

IT Nursery

RegEx for matching UK Postcodes

I’m after a regex that will validate a full complex UK postcode only within an input string. All of the uncommon postcode forms ...

May 27, 2022
0 Comments

javascript, Programming

IT Nursery

RegEx to extract all matches from string using RegExp.exec

I’m trying to parse the following kind of string:...

May 26, 2022
0 Comments

python re.sub group: number after \number

How can I replace foobar with foo123bar? This doesn’t work: >>> re.sub(r'(foo)', r'\1123', 'foobar') 'J3bar' This works: >>> re.sub(r'(foo)', r'\1hi', 'foobar') 'foohibar' I ...

May 22, 2022
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Named regular expression group “(?Pregexp)”: what does “P” stand for?

In Python, the (?P<group_name>…) syntax allows one to refer to the matched string through its name: >>> import re >>> match = re.search('(?P<name>.*) ...

May 20, 2022
0 Comments

What is a non-capturing group in regular expressions?

How are non-capturing groups, i.e., (?:), used in regular expressions and what are they good for? 1 18 Let me try to explain ...

April 10, 2022
0 Comments

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