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Re^4: heuristic to detect (perl) codeby LanX (Saint) |
on Jan 20, 2013 at 10:46 UTC ( [id://1014281]=note: print w/replies, xml ) | Need Help?? |
It's not that easy for instance: 1) comments '#' should (mostly) follow a newline or a semicolon or to be more precise the '#' shouldn't be preceded by a quote-like operator (single s, y tr, q, qq, qr or qw or whatever) 2) strings are closed by the same quote so you need to capture the opening one and check the ending with \1. 3) __DATA__ must appear at line start, OTOH the existence of DATA is already a good indicator for perlcode. I think discussing single strategies is for vain, in the end you have to test and train different criteria against a suitable big amount of perlmonk posts, to see if the code-sections are found. With bayes classifier there is a very good mathematical method to combine the probabilities of such methods. Some of the products I listed in OP use this approach, they are just not trained for perlmonks posts (where tiny code-snippets also appear in text) and have maybe a to heavy footprint to be integrated here. updateFor instance highlight.js has a function which returns the guessed language.
Cheers Rolf
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