I have a HTML list of about 500 items and a "filter" box above it. I started by using jQuery to filter the list when I typed a letter (timing code added later): $('#filter').keyup( function() { var jqStart = (new Date).getTime(); var search = $(this).val().toLowerCase(); var $list = $('ul.ablist > li'); $list.each( function() { if ( $(this).text().toLowerCase().indexOf(search) === -1 ) $(this).hide(); else $(this).show(); } ); console.log('Time: ' + ((new Date).getTime() - jqStart)); } ); However, there was a couple of seconds delay after typing each letter (particularly the first letter). So I thought it may be slightly quicker if I used plain Javascript (I read recently that jQuery's each function is particularly slow). Here's my JS equivalent: document.getElementById('filter').addEventListener( 'keyup', function () { var jsStart = (new Date).getTime()...
As Ranhiru said, here and here you can see how PDFs are parsed.
ReplyDeleteFor .mobi, however, there is no library, so you'll have to parse the format yourself. A full specification of the format can be read on the mobileread wiki.
With .azw files, it's different: if the Kindle ebook is DRM-free, then its format coincides with the .mobi one, i.e. they are absolutely interchangeable. Otherwise, it's very difficult to do, since you'll also have to generate a Kindle PID and perform the de-DRM-ing of the .azw file. There's a guide on how to do that on the desktop here. However, it is strongly not recommended, since it breaks the whole point of DRM and is illegal pretty much everywhere.