rx.rb - Ruby master - Ruby Issue Tracking System

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Bug #4088 » rx.rb

Modified script which shows grouping effect - rklemme (Robert Klemme), 11/25/2010 06:24 PM

    
    str = %w{ac aac Aac aAc AAc}

    i = 1

    [

      /(?<!a)c/i,

      /(?<!a|b)c/i,

      /(?<!aa)c/i,

      /(?<!aa|b)c/i,

      /(?<!(?:aa)|b)c/i,

      /(?<!b|aa)c/i,

      /(?<!b|(?:aa))c/i,

      /(?<!aa|bb)c/i,

    ].each do |rx|

      str.each do |s|

        printf "%2d %-20p %-5p %p\n", i, rx, s, s.scan(rx)

        i += 1

      end

    end

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