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Software Architecture: Layers and DTO’s
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Category Archives: Programming
(Deutsch) Back to the 60ties: Flussdiagramme
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Migrate a Ruby on Rails App to Rails 4.x with “Strong Parameters”
A helpful rake task I’m just updating a three year old rails app from 3.2 to 4.2. One of the changes is that now the controller is responsible to protect against mass assignments. I think this is the right architecture, … Continue reading
Quantum Computing with Ruby
Few know that you already can do quantum computing with the Japanese programming language Ruby. If you have a Ruby interpreter installed on your computer, you can follow the following experiment, which is inspired by Erwin Schrödinger. (See also my … Continue reading
How does the NFC-Hunt App from Google works?
Google organized a kind of scavenger hunt for the developers conference IO 2013 to demonstrate the practical use of NFC. Participants needed an NFC-enabled Android and then installed an app called “NFC Hunt”. The app gives clues where to find … Continue reading
Rotating Billboard with CSS-Animations
(Deutsch) Wie man Bilder auf Webseiten sich rotierend austauschen lässt, ohne JavaScript, nur mit CSS. Continue reading
JavaScript Incompatibilities in Webapps
(Deutsch) Zwei Inkompatibilitäten aus einem praktischen Projekt: Datumsfunktionen sind bei älteren Android-Geräten unvollständig, und die prompt-Methode wird von Microsoft still unterdrückt. Continue reading
Codename One – Swap Grid Cells
What is Codename One? The platform “Codename One” offers operating system-independent development of apps for smartphones. An important component is a library for user interfaces. Codename One is a successor of LWUIT, which in turn uses concepts of the Java … Continue reading
Presentation About Rails Database Optimization
Here are the English slides about how to optimize database queries in Ruby On Rails. I have showed this presentation at the Ruby User Group Hamburg at the 9th August 2012.