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A comment on Oh Yes You Can Use Regexes to Parse HTML. Parent comment

Re:Oh Yes You Can Use Regexes to Parse HTML by lloeki on Friday July 08, 2011 @07:51AM (#2742053)
As the comment by tchrist to this [0] downvoted answer says, as soon as back references were used (40 years ago apparently) regexes were not regular anymore.

[0] http://stackoverflow.com/questions/4231382/regular-expressio...

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