gistfile1.txt

urlRegex = /\b                                  // 1. match a word boundary, i.e. whitespace or punctuation
  (                                             // 2. capture the entire URL
   ( [\w-]+:\/\/? | www[.] )                    // 3. protocol:// or www.
   [^\s()]+                                     // 4. anything that's not whitespace, a paren, or an angle bracket
   (?:                                          // 5. non-capturing group (this is the last thing matched)
     \([\w\d]+\)                                // 6. trailing parenthesized word containing only alnums (wikipedia)
     |                                          //    or
     ( [^-!"#$%&'()*+,./:;?@[\\\]^_`{|}~\s]     // 7. [^[:punct:]\s] -- anything but punctuation or whitespace
       |                                        //    or
       \/                                       // 8. a trailing slash
     )
    )
  )
/