How to with Regular expressions

Hi, if you are using regular expressions, I recommend you the following tools and sites:

Regex tools to learn, build, test regular expressions:

http://regex.lumadis.be/test_regex.php?lang=fr

Tutorials about regexp:

http://en.wikipedia.org/wiki/Regular_expression

http://www.regular-expressions.info/quickstart.html

http://www.expreg.com/

Examples:

• .at matches any three-character string ending with “at”, including “hat”, “cat”, and “bat”.
• [hc]at matches “hat” and “cat”.
• [^b]at matches all strings matched by .at except “bat”.
• [^hc]at matches all strings matched by .at other than “hat” and “cat”.
• ^[hc]at matches “hat” and “cat”, but only at the beginning of the string or line.
• [hc]at$ matches “hat” and “cat”, but only at the end of the string or line.
• \[.\] matches any single character surrounded by “[” and “]” since the brackets are escaped, for example: “[a]” and “[b]”.
• s.* matches any number of characters preceded by s, for example: “saw” and “seed”.