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[xkcd] Regular Expressions (10 Jan 2007) (programming.dev)

submitted 9 months ago by mac to c/comics

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source under CC BY-NC 2.5 Deed
explainxkcd/208

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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.]

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[–] [email protected] 4 points 9 months ago (1 children)

I wrote a regex that matches 100% of email addresses and had no problems using it. It's ".+@.+"

[–] [email protected] 1 points 9 months ago* (last edited 9 months ago)

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