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Create an CSS-only Responsive Image Grid (with ratio scaling)

Posted on 18 August 2014 | Development by Raymon Schouwenaar

(almost) Everywhere on the web nowadays you see Responsive Websites, but it can be challenging to get your images to scale in ratio. Here is a small demo I made of one solution. Step 1 Create an HTML list with images and an text label. I use dummy images from Lorempixel.com, it’s super handy! 1 …


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Using sendmail as a mail server

Posted on 30 July 2014 | Systems by Jeroen de Meijer

Last time I described how you can easily configure a system to send email to a central mailserver with sendmail. Using sendmail as a basic mailserver isn’t difficult either. Again, the sendmail.cf file is not designed to be readable, but optimized for parsing. The correct (and easy) way to configure sendmail is by using macro’s. …


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Create partials in a static site with jQuery

Posted on 30 July 2014 | Development by Raymon Schouwenaar

If you’re building a static website, you know that if you change the footer or header you need to change it in every html page. Of course if you’re using some server-side language like PHP you can include partial files, but jQuery can help too. Place the code of your header in header.html (for example). …


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Configuring sendmail using macro’s

Posted on 8 July 2014 | Systems by Jeroen de Meijer

A lot of sysadmins complain that sendmail is way to difficult and that the sendmail.cf file is unreadable. The fact is however, that the sendmail.cf is not designed to be human readable (but optimized for parsing). The correct (and easy) way to configure sendmail is by using macro’s. You define which macro’s you want to …


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Switching files

Posted on 7 July 2014 | Systems by Daniel Schutterop

I can’t even recall how often I copy a file to filename.org and revise the original, just to copy the .org back to its original when my actions fail. Or even worse, copying the modified file to a filename.org.2, copying the filename.org to filename and the filename.org.2 to filename.org. Been there? Way too many actions …


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Automating tasks with Fabric

Posted on 1 July 2014 | Systems by Arjen de Vries

For a client I had to test and setup a new puppet environment. This included reinstalling and configuring the base installation multiple times. To make my life a bit easier i’ve created the fabric fabfile shown below. It’s not that fancy but can make your life a lot easier. I’ve used it on mainly Scientific …


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How to build a docker image based on debian 14.04 LTS with an Nginx webserver

Posted on 11 June 2014 | Systems by Arjen de Vries

In this short tech tutorial i’ll show you how to build a docker image based on debain 14.04 LTS with an Nginx webserver. Of course you an also use an image from the docker repositories, but where’s the fun in that First we’ll need a base image to build our docker image from. You can …


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Custom Directives with AngularJS

Posted on 10 June 2014 | Development by Nouh Lahouel

In this technical report I will show you how to create a custom directive in AngularJS and implement it in your project. The intent of this way of coding is to clean up your HTML sourcecode and make it more readable for developers or other projectmembers. Beside of that your code gets more organized. First …


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What to do if your customer says it needs to be high available

Posted on 10 June 2014 | Systems by Jeroen de Meijer

I hear and see this a lot; the customer just stating that something needs to be high available. But what is high available? If you try to get this clarified it most often still stays unclear as the customer doesn’t really understand what it entails themselves. So, what questions to ask to help the customer …


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Performance tuning – Part 1

Posted on 10 June 2014 | Development by Bastiaan Dressen

In the realm of front-end development, lots of DOM manipulation libraries exist. The most popular library, without a doubt, is jquery. A DOM manipulation library, providing very concise shorthand commands, cross-browser compatibility and a very gradual learning curve. All this, and an extremely large active community, contributed to its high popularity. Can’t have it all …


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