Daniel Molina Wegener
Daniel is a system programmer & web developer with 10 years of experience...

system programmer & web developer

coder . cl

a journey in software development...

using dependency injection on gui

by Daniel Molina Wegener on 11-04-2010

Many people know the Model View Controller architectural pattern. Another interesting pattern is Presentation Abstraction Control architectural pattern. We can implement it using Dependency Injection or similar Inversion of Control patterns. So, when we are modeling solutions, we many times leave the control or business logic on the Controller. This will guide us to a very coupled platform. Remember that any well designed architecture claims for cohesion instead of coupling its components. On this article I will try to analyze the use of IoC on the PAC pattern, so we can have more maintainable software components, mainly on n-tier architectures.

11-04-2010 | algorithms, development, projects, tips | Read on | Comments (0)

source code optimization in c

by Daniel Molina Wegener on 31-12-2009

"…premature optimization is the root of all evil".
— Donald Knuth

I agree with the fact that we must do our source code level optimizations when we have finshed the construction stage or it is almost complete. I was searching articles and papers about optimizing C source code to be applied on my programs and libraries. I’ve collected some of those optimizations. But you must not confuse algorithm optimization, source code optimization and compiler optimization, since the first one refers to algorithm design and the second one just refers to the algorithm implementation, and both are sharing just few common approaches to formal reductions.

31-12-2009 | algorithms, c, development, programming, tips | Read on | Comment (1)

java mutexes

by Daniel Molina Wegener on 14-12-2009

Java synchronization is usually made through the synchronized keyword. Synchronized allow users to create a mutex around certain variable, class or method, where a mutex allows concurrent access to it. By concurrent access we should understand access from multiple threads. If an operation is atomic, there one and only one process or thread executing it. Then, mutex based operations are atomic.