Demystifying decoupling and cohesion in Software Architecture

Decoupling and cohesion are phrases that are thrown around in software very often. You kind of know what they mean, but do you really?  Decoupling Coupling in software architecture usually applies to modules in OOP. It measures how dependent are modules from each other - how strong is the connection...

Solving the NSNumber mystery

Ignorance is bliss. I used NSNumber and didn't really care how it really works. One day when I had to find out what's inside NSNumber (bool, float or integer) that bubble burst. It turned out that you can't really find out what NSNumber is holding with simply calling a method on the object, which...