Regex; one line creative solution for Secret Message by ale1ster - python coding challenges

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Regex; one line solution in Creative category for Secret Message by ale1ster

find_message = lambda text: __import__('re').sub(r'[^A-Z]', '', text[:])

Sept. 3, 2014

Comments:

nickie on Sept. 16, 2014, 3:38 p.m.
Do you need the [:] here?

ale1ster on Sept. 16, 2014, 4:49 p.m.
Well, since re.sub returns a new string, turns out you don't! I'm a little zombie sometimes :$ Since python's re doesn't support character class properties, I wrote it in Perl first, where <pre class='brush: python'>$w =~ s/\p{Lu}//g; </pre> would mutate $w, but <pre class='brush: python'>$w =~ s/\p{Lu}//gr; </pre> wouldn't... Sorry about that! Also, due to the above point, any (or at least most) re implementations are wrong. The correct approach would be to use str's predicates. Or hardcode all characters with the Uppercase_Letter or Titlecase_Letter property in the substitution. <a href="http://www.checkio.org/forum/post/2519/capital-letter/">Relevant discussion</a> P.S.: TMI, but it just came out :)

Arandomusername on Feb. 26, 2015, 12:38 p.m.
Pretty smart, but regex steals a lot of performance

ale1ster on Feb. 26, 2015, 4:10 p.m.
True, but it's a pretty straight-forward implementation...

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