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[xkcd] Regular Expressions (10 Jan 2007)
(programming.dev)
Hover Text:
Wait, forgot to escape a space. Wheeeeee[taptaptap]eeeeee!
Transcript
[in a yellow box:]
Whenever I learn a new skill I concoct elaborate fantasy scenarios where it lets me save the day.Megan: Oh no! The killer must have followed her on vacation!
[Megan points to computer.]
Megan: But to find them we'd have to search through 200 MB of emails looking for something formatted like an address!
Cueball: It's hopeless!Off-panel voice: Everybody stand back.
Off-panel voice: I know regular expressions.
[A man swings in on a rope, toward the computer.]
tap tap
The word PERL! appears in a bubble.[The man swings away, and the other characters cheer.]
I wrote a regex that matches 100% of email addresses and had no problems using it. It's ".+@.+"
Meme aside that's what I'd use tbh. Or the ultimate email validation: just sending the signup email and if they typed an invalid email it won't send