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09.17.2007 at 01:24PM PDT, ID: 22834319
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8.8

Efficiently sorting HTML elements with Javascript

Asked by gis-jedi in JavaScript, Scripting Languages, Dynamic HTML (DHTML)

Tags: , , ,

I have a page running JavaScript that I would like to have sort some HTML elements based on a date attribute in the elements.

I wrote an algorithm that does the following:

* Create a new parent node
* Go through each element of the original parent, read its date attribute, and insert it into the new parent based on the numeric value of the date

I am performing a binary search to find where to insert the elements in their new parent. I choose the middle item of the new parent, compare the data against the item being inserted, and based on that move on to check against the item in the 1/4 position or 3/4 position. There I divide the search pool in half again to check 1/8 of the total. And so on.

The algorithm works really well, but when I get up to around 19,000 elements the performance becomes nasty.

One issue that probably hurts the speed is that the date is parsed as an integer from the element's attribute each time a comparison is made. Is there any way to store the date for an element without using a textual attribute? element.date = x doesn't work right, so I have to use element.setAttribute("date", x) and date = parseInt(element.getAttribute("date")). Is there a way I can store the raw integer value?

I appreciate any suggestions on ways I can improve this sorting system.Start Free Trial
 
 
[+][-]09.17.2007 at 01:48PM PDT, ID: 19908298

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About this solution

Zones: JavaScript, Scripting Languages, Dynamic HTML (DHTML)
Tags: javascript, sort, html, elements
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Solution Provided By: pravinasar
Participating Experts: 3
Solution Grade: A
 
 
[+][-]09.17.2007 at 01:49PM PDT, ID: 19908310

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[+][-]09.18.2007 at 05:02AM PDT, ID: 19911940

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[+][-]09.18.2007 at 05:04AM PDT, ID: 19911950

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[+][-]09.18.2007 at 07:19AM PDT, ID: 19912982

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[+][-]09.18.2007 at 10:10AM PDT, ID: 19914746

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[+][-]10.20.2007 at 08:41PM PDT, ID: 20116776

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