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POHow do handle control flow better and nil objects in ruby
 

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  1. POHow do handle control flow better and nil objects in ruby
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    <p>I have this script that is a part of a bigger one. I have tree diffrent XML files that looks a litle diffrent from each other and I need some type of control structure to handle nil-object and xpath expressions better</p> <p>The script that I have right now, outputs nil objects: </p> <pre><code>require 'open-uri' require 'rexml/document' include REXML @urls = Array.new() @urls &lt;&lt; "http://testnavet.skolverket.se/SusaNavExport/EmilObjectExporter?id=186956355&amp;amp;strId=info.uh.kau.KTADY1&amp;amp;EMILVersion=1.1" @urls &lt;&lt; "http://testnavet.skolverket.se/SusaNavExport/EmilObjectExporter?id=184594606&amp;amp;strId=info.uh.gu.GS5&amp;amp;EMILVersion=1.1" @urls &lt;&lt; "http://testnavet.skolverket.se/SusaNavExport/EmilObjectExporter?id=185978100&amp;amp;strId=info.uh.su.ARO720&amp;amp;EMILVersion=1.1" @urls.each do |url| doc = REXML::Document.new(open(url).read) doc.elements.each("/educationInfo/extensionInfo/nya:textualDescription/nya:textualDescriptionPhrase | /ns:educationInfo/ns:extensionInfo/gu:guInfoExtensions/gu:guSubject/gu:descriptions/gu:description | //*[name()='ct:text']"){ |e| m = e.text m.gsub!(/&lt;.+?&gt;/, "") puts "Description: " + m puts "" } end </code></pre> <p>OUTPUT:</p> <blockquote> <p>Description: bestrykning, kalandrering, tryckning, kemiteknik</p> <p>Description: Vill du jobba med internationella och globala frågor med... Description: The study of globalisation is becoming ever more important for our understanding of today´s world and the School of Global Studies is a unique environment for research.</p> <p>Description: </p> <p>Description: </p> <p>Description: Kursen behandlar identifieringen och beskrivningen av sjukliga förändringar i mänskliga skelett. Kursen ger en ämneshistorisk bakgrund och skelettförändringars förhållanden till moderna kliniska data diskuteras.</p> </blockquote>
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    1. USSHUMAcupcake
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    1. COTips: `puts "Description: " + m` is better written as `puts "Description: #{m}"`, IMO. Also, `puts ""` is equivalent to just `puts`. Also you can do just `foo = []` instead of `foo = Array.new` (see [this question](http://stackoverflow.com/questions/4601652/ruby-array-creation-array-new-vs) for more on that).
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      1. USAndrew Marshall
    2. CO@Andrew: Thanks mate
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