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POXSLT: How to check if certain nodes are all equal in one parent
 

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  1. POXSLT: How to check if certain nodes are all equal in one parent
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    <p>I am trying to think of a XSL snippet that would check if a class has all the students with the same lastname. It yes, then (do anything like) print "all lastnames are same" else print "all lastnames are not same". </p> <p>It really doesn't matter what to print. I am just trying to find the right logic for it.</p> <p>Here is my sample XML:</p> <pre><code>&lt;root&gt; &lt;class name="Physics"&gt; &lt;student&gt; &lt;firstname&gt;John&lt;/firstname&gt; &lt;lastname&gt;Doe&lt;/lastname&gt; &lt;age&gt;21&lt;/age&gt; &lt;/student&gt; &lt;student&gt; &lt;firstname&gt;Mary&lt;/firstname&gt; &lt;lastname&gt;Doe&lt;/lastname&gt; &lt;age&gt;21&lt;/age&gt; &lt;/student&gt; &lt;student&gt; &lt;firstname&gt;Ralph&lt;/firstname&gt; &lt;lastname&gt;Doe&lt;/lastname&gt; &lt;age&gt;21&lt;/age&gt; &lt;/student&gt; &lt;/class&gt; &lt;class name="Math"&gt; &lt;student&gt; &lt;firstname&gt;John&lt;/firstname&gt; &lt;lastname&gt;Doe&lt;/lastname&gt; &lt;age&gt;21&lt;/age&gt; &lt;/student&gt; &lt;student&gt; &lt;firstname&gt;Mary&lt;/firstname&gt; &lt;lastname&gt;Doe&lt;/lastname&gt; &lt;age&gt;21&lt;/age&gt; &lt;/student&gt; &lt;student&gt; &lt;firstname&gt;Tee&lt;/firstname&gt; &lt;lastname&gt;Rex&lt;/lastname&gt; &lt;age&gt;21&lt;/age&gt; &lt;/student&gt; &lt;/class&gt; &lt;/root&gt; </code></pre> <p>Therefore, for Physics class it would print "all lastnames are same". And for math class, it would print "all lastnames are not same".</p> <p>(This is not my real XML because it was irreducible to a smaller problem, so instead I custom made this XML to represent my issue)</p> <p>Any help will be greatly appreciated.</p> <p>regards, Shobhit</p>
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    1. COGood question (+1). See my answer for an efficient solution. :)
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      1. USDimitre Novatchev
    2. COGuys thanks a ton for your solutions! I have ended up using Tomalak's approach. While other's approach are good as well, Tomalak's solution is just pretty simple to understand and use.
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