Regex Engine Internals as a Library

Re:Regex Engine Internals as a Library by Izkata on Wednesday July 05, 2023 @04:02PM (#36606252)

Python (even in 2):

  >>> import re
  >>> pattern = re.compile(r"([0-9]{4})-([0-9]{2})-([0-9]{2}) ([0-9]{2}):([0-9]{2}):([0-9]{2})")
  >>> results = pattern.match('1973-01-05 09:30:00')
  >>> results.groups()
  ('1973', '01', '05', '09', '30', '00')
  >>> (y, m, d, h, min, s) = results.groups()

(`results` will be None if the regex didn't match)

Regexes are one of those things where, once you understand it (and capture groups in particular) and it's available in the language you're working in, string-splitting usually doesn't feel right anymore.

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Re:Regex Engine Internals as a Library by burntsushi on Wednesday July 05, 2023 @04:46PM (#36606851)

I believe all of the people in this thread understand regexes extremely well. :-)

There is a lot of reasonable room to disagree about when and where regexes should be used.

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