Lizardsquid, maker of noises @lizardsquid@computerfairi.es

@hntooter the accepted answer is misleading if you're not paying attention.

A regular expression cannot detect a valid regular expression.

An Extended regular expression (like the ones most people use nowadays) can detect a non-extended regular expression.

The third answer is the correct one: https://stackoverflow.com/a/172363

Is there a regular expression to detect a valid regular expression?
https://stackoverflow.com/questions/172303/is-there-a-regular-expression-to-detect-a-valid-regular-expression

(submitted by lelf)

mythic sisyphus's twisting hips

his fists twitch, his grip slips

hissing: "piss"

@fruitmachine you were so close!!!

Old-time proverb: "a paperclip a day keeps the doctor away".

The sunset was orange and the sun was red as the two ships moved closer. So orange, the flag of parlay could barely be seen against the sky. Yonpler could, if she squinted, see the three black lines and the white diagonal on the orange background.

In some sense, it didn't matter. Yonpler's ship was flying the same orange flag, and no-one would attack someone flying that hue. Only the parley flags were orange; no-one could claim they had made a mistake of identification, sunset or no.

1/2~