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POJavascript/Jquery - Don't repeat yourself
 

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  1. POJavascript/Jquery - Don't repeat yourself
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    <p>I've seen this so many times on the internet. People say to don't repeat yourself in programming languages. I wrote this script for my webpage but I repeated myself quite a bit.</p> <p><strong>Is it really that big of a deal?</strong></p> <p>Should I make a function?</p> <p>How do I do it?</p> <pre><code>var active = '.teachers'; var disabled = '.teacher-link'; var width = $('.teachers .staff-outer-container').children().size() * 180; $('.staff-outer-container').css('width', width + 'px'); $('.teacher-link').click(function() { if (active != '.teachers') { $(active).hide(); active = '.teachers'; $(active).show(); width = $('.teachers .staff-outer-container').children().size() * 180; $('.teachers .staff-outer-container').css('width', width + 'px'); $(disabled).removeClass('active').addClass('clickable'); disabled = this; $(disabled).removeClass('clickable').addClass('active'); $('#type').text('Teachers'); } }); $('.admin-link').click(function() { if (active != '.administrators') { $(active).hide(); active = '.administrators'; $(active).show(); width = $('.administrators .staff-outer-container').children().size() * 180; $('.administrators .staff-outer-container').css('width', width + 'px'); $(disabled).removeClass('active').addClass('clickable'); disabled = this; $(disabled).removeClass('clickable').addClass('active'); $('#type').text('Administrators'); } }); $('.support-link').click(function() { if (active != '.support') { $(active).hide(); active = '.support'; $(active).show(); width = $('.support .staff-outer-container').children().size() * 180; $('.support .staff-outer-container').css('width', width + 'px'); $(disabled).removeClass('active').addClass('clickable'); disabled = this; $(disabled).removeClass('clickable').addClass('active'); $('#type').text('Support Staff'); } }); </code></pre> <p><strong>edit</strong> Thanks for everyone's input! I'm confused on how to implement these functions. This is what I got: <code>$('.teacher-link').click(handle_click('.teachers', 'Teachers'));</code> I tried this out and it didn't work. Also where do I place the function? Do I place it inside or outside <code>$(document).ready</code> ? Is it best to put functions at the start or the end of my script?</p>
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    1. CODon't repeat yourself. `$(active)` is creating a jQuery object over and over again. Create it once, store it in a variable. ;)
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    2. COThe problem comes down to maintainability, both engineering and software practice: http://en.wikipedia.org/wiki/Maintainability and http://en.wikipedia.org/wiki/Software_maintenance. Depending on context, this is a enormous, or very small issue. It is still an issue.
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    3. CO@epascarello actually in this case, active is actually changing between the the object creations
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      1. USRicardo Rodrigues
 

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