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POXSL to show highest number of copies in catalog.xml file
 

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  1. POXSL to show highest number of copies in catalog.xml file
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    <p>In this the <code>catalog.xml</code> file. I have two books who have the same inventory (i.e. 20). I want to write an XSL file that will display the highest number of copies of a book in a catalog. If there are two or more books of the same inventory then they have to be displayed.</p> <pre><code>&lt;catalog&gt; &lt;Book&gt; &lt;sku&gt;12345&lt;/sku&gt; &lt;title&gt;Beauty Secrets&lt;/title&gt; &lt;condition&gt;New&lt;/condition&gt; &lt;current_inventory&gt;20&lt;/current_inventory&gt; &lt;price&gt;99.99&lt;/price&gt; &lt;/Book&gt; &lt;Book&gt; &lt;sku&gt;54321&lt;/sku&gt; &lt;title&gt;Picturescapes&lt;/title&gt; &lt;current_inventory&gt;20&lt;/current_inventory&gt; &lt;condition&gt;New&lt;/condition&gt; &lt;price&gt;50.00&lt;/price&gt; &lt;/Book&gt; &lt;Book&gt; &lt;sku&gt;33333&lt;/sku&gt; &lt;title&gt;Tourist Perspectives&lt;/title&gt; &lt;condition&gt;New&lt;/condition&gt; &lt;current_inventory&gt;0&lt;/current_inventory&gt; &lt;price&gt;75.00&lt;/price&gt; &lt;/Book&gt; &lt;Book&gt; &lt;sku&gt;10001&lt;/sku&gt; &lt;title&gt;Fire in the Sky&lt;/title&gt; &lt;condition&gt;Used&lt;/condition&gt; &lt;current_inventory&gt;0&lt;/current_inventory&gt; &lt;price&gt;10.00&lt;/price&gt; &lt;/Book&gt; &lt;/catalog&gt; </code></pre> <p>Below is my <code>catalog3.xsl</code> file which is able to display only one out of the two books:</p> <pre><code>&lt;xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" &gt; &lt;xsl:variable name="max"/&gt; &lt;xsl:template match="/"&gt; &lt;html&gt; &lt;body&gt; &lt;h2&gt;Titles of Books for which Most Copies are Available&lt;/h2&gt; &lt;table border="2"&gt; &lt;tr bgcolor="#9acd32"&gt; &lt;th&gt;Title&lt;/th&gt; &lt;th&gt;No of Copies&lt;/th&gt; &lt;/tr&gt; &lt;xsl:apply-templates/&gt; &lt;/table&gt; &lt;/body&gt; &lt;/html&gt; &lt;/xsl:template&gt; &lt;xsl:template match="catalog"&gt; &lt;xsl:for-each select="Book"&gt; &lt;xsl:sort select="current_inventory" data-type="number" order="descending"/&gt; &lt;tr&gt; &lt;xsl:if test="position()= 1"&gt; &lt;p&gt;&lt;xsl:value-of select="$max = "/&gt;&lt;/p&gt; &lt;td&gt;&lt;xsl:value-of select="title"/&gt;&lt;/td&gt; &lt;td&gt;&lt;xsl:value-of select="current_inventory"/&gt;&lt;/td&gt; &lt;/xsl:if&gt; &lt;/tr&gt; &lt;/xsl:for-each&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre> <p>Could anybody correct me to achieve my goal of displaying all the copies having the same maximum inventory in the catalog. Thanks.</p>
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    1. USSanjay Rao
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    1. COGood question: +1. See a solution in which you don't need to calculate and keep the maximum in a separate variable. Also, this way of finding the maximum may be more efficient than with sorting the whole node-set, because only the different-valued nodes are sorted. Enjoy. :)
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      1. USDimitre Novatchev
 

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