Ruby Regexp Unescape

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May not be a big deal to write it yourself…but I wrote this and was quite useful, where I had to do un-escaping of a Regex Pattern for some reasons… 

class Regexp
  def unescape
    source = self.source.split('')
    escape_on = false
    unescaped_string = source.inject([]) {|r, char|
      if char == "\\" and escape_on == false
        escape_on = !escape_on
      else
        r << char
        escape_on = false
      end
      r
    }.join
  end
end

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