There are few best practices, which might or might not answer your question:
- Don't match character ranges. You will forget some. For example is there are a good reason to match [a-zA-Z], but not all those other Latin characters out there? Unicode contains more than 100k characters. Enumerating a subset of them is bound to fail, unless you have very narrow ideas about your subset.
- Don't match Unicode blocks. They are just organizational units, nothing that the user or programmer should ever care about
- If you want to check for Letter, Digits etc. use the appropriate Unicode property (a list can be found in perlunicode), like \p{LowercaseLetter} or short \p{Ll} (though the longer form is probably better readable)
- If you want to check for a script, use constructs like \p{Hiragana}.
- Remeber that there might be diacritic markings that belong conceptually to a different script, so instead of \p{YourScript}+ you might want to check for \p{YourScript}(?:\p{Mark}|\p{YourScript})*.
- When counting characters, use \X rather than . in regexes.
(Disclaimer: I assume you deal with human language. For file formats or other artificial stuff it may very well be appropriate to do things that I recommended against above).
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
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<blockquote> <br /> <dd>
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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