"In the IT world, regular expressions searches justifiably have gained a reputation for being fiendishly complicated. Instagram’s regular expressions for findin

"In the IT world, regular expressions searches justifiably have gained a reputation for being fiendishly complicated. Instagram’s regular expressions for finding emojis may be the most complicated yet." This stack overflow post [1] and Perl module [2] both come mind. [0] http://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags/1732454#1732454 http://stackoverflow.com/questions/1732348/regex-match-open-... [1] http://www.ex-parrot.com/pdw/Mail-RFC822-Address.html http://www.ex-parrot.com/pdw/Mail-RFC822-Address.html