Dr. Regex

Unique, esoteric insight into the world of regular expressions.

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Wednesday, 13 February 2019

Variable-Length Lookbehinds: actually possible in Perl/PCRE!

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Get strapped in, because this is as close as you're going to get to breaking news in the world of regular expressions. Y ou know wha...
197 comments:
Tuesday, 13 November 2018

For Regex Purists: Can Formal Regular Expressions Be Fun?

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Pre Ramble Can formal regular expressions be fun? This is a question I asked myself recently. Modern regex engines have strayed a ways a...
6 comments:
Thursday, 1 November 2018

How to match "A B C" where A+B=C: The Beast Reborn

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A while ago, I created a regex to verify addition of two non-negative integers, and unleashed the unholy mess onto reddit . Reactions were ...
17 comments:
Thursday, 6 September 2018

How to Match "A B C" where A+B=C: The Beast Tamed

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A regex I submitted to Reddit  recently climbed to the top of /r/programming and made quite a few heads explode in the process. As delightf...
4 comments:
Tuesday, 7 November 2017

Match Nested Brackets with Regex: A new approach

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My first blog post was a bit of a snoozefest, so I feel I ought to make this one a little shorter and more to the point. I'm going to...
7 comments:
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