From: 7stud -- <lists@...>
Date: 2012-12-21T04:55:46+09:00
Subject: Re: Perl to Ruby: regex captures to assignment.

Derrick B. wrote in post #1089748:
>
> I am prompting for input, so I would be parsing individual strings and
> not a list of them.  Though I will remember that for future static
> testing.  Also, I and using the "\S+" to handle negative rational
> numbers: "-1 3/4".
>


test_data = [
  "3/4",
  "1 3/4",
  "-1 3/4",
  'hello'
]


test_data.each do |str|
  match_data = str.match(
   %r{
        (
          [-]?
          \d+
        )?
        \s*
        (\d+)
        /
        (\d+)
     }xms
  )

  w, n, d =  match_data ? match_data.captures: [str, 0, 1]
  puts "%s %s %s" % [w, n, d]

end

--output:--
 3 4
1 3 4
-1 3 4
hello 0 1

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