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Regex Cheatsheets

In most regex dialects there are a set of convenient character summaries you can use for this kind of thing - these are good ones to remember:
\w - Matches any word character. 
\W - Matches any nonword character. 
\s - Matches any white-space character. 
\S - Matches anything but white-space characters. 
\d - Matches any digit. 
\D - Matches anything except digits.
A search for "Regex Cheatsheets" should reward you with a whole lot of useful summaries.

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