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POjQuery table sort function only sorting one-way
 

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    <p>I'm working through a jQuery book and am currently on the chapter of table sorting. Using the example code in the book I've set up the following test scenario, when I click on a column heading it correctly sorts the data one way (ascending), but when I click on the same column heading again nothing happens (I'm expecting the data to be sorted descending on the 2nd click). </p> <p>Can anybody take a look at the sample code below and tell me why this is?</p> <p><strong>HTML:</strong></p> <pre><code>&lt;table class="sortable"&gt; &lt;thead&gt; &lt;tr&gt; &lt;th class="sort-alpha"&gt;&lt;strong&gt;Flat number&lt;/strong&gt;&lt;/th&gt; &lt;th class="sort-alpha"&gt;&lt;strong&gt;Tenant name&lt;/strong&gt;&lt;/th&gt; &lt;/tr&gt; &lt;/thead&gt; &lt;tbody&gt; &lt;tr&gt; &lt;td&gt;83&lt;/td&gt; &lt;td&gt;Rachel Prouse&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt;79&lt;/td&gt; &lt;td&gt;Natalie Charles&lt;/td&gt; &lt;/tr&gt; &lt;/tbody&gt; &lt;/table&gt; </code></pre> <p><strong>jQuery:</strong></p> <pre><code>$(document).ready(function () { $('table.sortable').each(function() { var $table = $(this); $('th', $table).each(function(column) { var $header = $(this); if ($header.is('.sort-alpha')) { $header .addClass('clickable') .hover( function() { $header.addClass('hover') }, function() { $header.removeClass('hover'); }) .click(function() { var rows = $table.find('tbody &gt; tr').get(); rows.sort(function(a, b) { var keyA = $(a).children('td').eq(column).text().toUpperCase(); var keyB = $(b).children('td').eq(column).text().toUpperCase(); if (keyA &lt; keyB) return -1; if (keyA &gt; keyB) return 1; return 0; }); $.each(rows, function(index, row) { $table.children('tbody').append(row); }); }); } }); }); }); </code></pre>
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