From: Joao Silva <rubyforum@...>
Date: 2009-08-23T09:37:58+09:00
Subject: [array & regexp] Development - works, production not - why?

My development envrioment:

~% ruby -v
ruby 1.8.7 (2008-08-11 patchlevel 72) [i686-darwin9]

My production envrioment:

x@x:~$ ruby -v
ruby 1.8.6 (2008-08-11 patchlevel 287) [i686-linux]
Ruby Enterprise Edition 20090610

My code:

  # Convert comma separated string to array of Regexps & compiles to one
Regexp.
  # From "test, /test/i, testoweX, test-*, te?st*, /te(.*)t/" makes
/(?-mix:test)|(?i-mx:test)|(?-mix:testoweX)|(?-mix:test-.*)|(?-mix:te.st.*)|(?-mix:te(.*)t)/
  def negative_terms_regexp
    buffer = []
    negative_terms.split(',').each do |term|
      term.strip!
      if term.include_regexp?
        buffer << term.to_regexp
      else
        if term.include?('*') || term.include?('?')
          buffer << term.gsub("?", ".").gsub("*", ".*").to_regexp
        else
          buffer << Regexp.new(term)
        end
      end
    end
    Regexp.union(buffer.uniq)
  end

Here is also my String class monkeypatch:

class String
  # Does string containg regexp?
  def include_regexp?
    if /\A\/.*\/[iomx]*\Z/.match(self)
      true
    else
      false
    end
  end

  # Convert any String to Regexp.
  # More info: http://www.ruby-forum.com/topic/193809
  def to_regexp
    return Regexp.new(self) unless
self.strip.match(/\A\/(.*)\/(.*)\Z/mx)
    regexp , flags = $1 , $2
    return nil if !regexp || flags =~ /[^xim]/m

    x = /x/.match(flags) && Regexp::EXTENDED
    i = /i/.match(flags) && Regexp::IGNORECASE
    m = /m/.match(flags) && Regexp::MULTILINE

    Regexp.new regexp , [x,i,m].inject(0){|a,f| f ? a+f : a }
  end
end

This code in development works properly, but in production, i get array
of pure strings instead of array of regexp. What's wrong? Thanks!
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