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    <p>Regex are powerful, but you'll find they also often add needless complexity to a problem.</p> <p>This is how I'd go about the problem:</p> <pre><code>text = &lt;&lt;EOT The starting point,obviously,is a thorough analysis ofthe intellectual property portfolio,the contents ofwhich can be broadly divided into two categories:property that is in use and property that is not in use ========== Essentials of Licensing Intellectual Property (Alexander I. Poltorak, Paul J. Lerner) - Highlight on Page 25 | Added on Friday, 25 November 11 10:53:36 Greenwich Mean Time commentators (a euphemism for prolific writers with little experience ========== Essentials of Licensing Intellectual Property (Alexander I. Poltorak, Paul J. Lerner) - Highlight on Page 26 | Added on Friday, 25 November 11 10:54:29 Greenwich Mean Time EOT text.each_line do |l| l.chomp! next if ((l =~ /\AEssentials/) .. (l =~ /Time\z/)) puts l end </code></pre> <p>Which outputs:</p> <pre><code>The starting point,obviously,is a thorough analysis ofthe intellectual property portfolio,the contents ofwhich can be broadly divided into two categories:property that is in use and property that is not in use ========== commentators (a euphemism for prolific writers with little experience ========== </code></pre> <p>This works because the <code>..</code>, AKA range operator, gains new capability when used with an <code>if</code>, and turns into what we call the flip-flop operator. In operation what happens is <code>((l =~ /\AEssentials/) .. (l =~ /Time\z/))</code> returns false, until <code>(l =~ /\AEssentials/)</code> matches. From then until <code>(l =~ /Time\z/)</code> matches it returns true. Once the final regex matches it returns to returning false. </p> <p>This behavior works really well for extracting sections from text.</p> <p>If you are aggregating text, for subsequent output, replace the <code>puts l</code> with something to append <code>l</code> to a buffer, then output that buffer at the end of your run.</p>
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    1. POMultiple line regex in ruby
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    1. USthe Tin Man
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    1. CO+1 for the flipflop; but the first sentence warns against regexes while the code uses 2 of them.
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      1. USsteenslag
    2. COI must admit I was a little confused about that. Thank you so much for the solution!
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      1. USRichard Burton
    3. COThe code uses two very simple ones, which are much easier to maintain than one complex one. Regex complexity doesn't seem to increase arithmetically.
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      1. USthe Tin Man
 

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