jt

- any character you use it will literally match it except special characters
^ $ ? . / \ [ ] { } ( ) + * - all the special characters that will need escaping if you don't want them to be special
// - regexp ruby class

Common Patterns (I authored)
/[\w+\.~-]+@[\w~-]+.[\w\.]+/ - match emails, conforms to RFC 3986 section 3.3
/\+?(\d)?[-|\.|\s]?\(?(\d{3})\)?[-|\.|\s]?(\d{3})[-|\.|\s]?(\d{4})/ - match phone numbers, https://gist.github.com/1009331

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