Learn regular expressions in about 55 minutes

Re:Learn regular expressions in about 55 minutes by leeoniya on Monday March 10, 2014 @02:09AM (#7371512)

i'm not sure if this puzzle is meant to be a joke, but it pretty much looks like it.

things like (O|RM|HHM)* which means match anything. who the hell would every write (.)(.)(.) when even capturing those is pointless in a crossword.

meh, i say.

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Re:Learn regular expressions in about 55 minutes by markild on Monday March 10, 2014 @05:33AM (#7372004)

I'm not entirely sure what you are saying, but I actually find this puzzle quite interesting.

(O|RM|HHM)* doesn't match "anything", but rather "nothing" or something quite specific. [0]

There are multiple rows in the puzzle where things _can_ match anything, but they are pretty fast limited by the opposing row/column.

[0]: http://www.regexper.com/#%28O|RM|HHM%29*

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Re:Learn regular expressions in about 55 minutes by leeoniya on Monday March 10, 2014 @08:23PM (#7376649)

yeah sorry, wrote that in a hurry. i meant, if it can match nothing and still be valid, what's the point? you may as well write `.*`

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Re:Learn regular expressions in about 55 minutes by TophWells on Monday March 10, 2014 @09:16AM (#7372692)

Well, remember that it also has to fit in the row/column. If there's three spaces available, the string has to have three characters. So (O|RM|HHM)* can only really match ORM, RMO, and HHM.

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Re:Learn regular expressions in about 55 minutes by oneeyedpigeon on Monday March 10, 2014 @10:15AM (#7372977)

And OOO.

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Re:Learn regular expressions in about 55 minutes by TophWells on Monday March 10, 2014 @11:20AM (#7373403)

Forgot about that one.

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