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Category Archives: OOP
On Information Hiding and Encapsulation
This month I participated in IBM Haifa’s Programming Languages and Software Engineering (PLSE) Seminar. There I had the opportunity to have lunch with David Parnas, one of the world pioneers in the field of Software Engineering. Parnas is the father … Continue reading
An Event-Driven Approach for the Separation of Concerns
Last week I presented a paper at the International Conference on Evaluation of Novel Approaches to Software Engineering (ENASE 2012), at Wroclaw, Poland. Title: “An Event-Driven Approach for the Separation of Concerns” Abstract: “This paper presents an event-driven approach for … Continue reading
Separation of Concerns
The most important principle in Software Engineering is the Separation of Concerns (SoC): The idea that a software system must be decomposed into parts that overlap in functionality as little as possible. It is so central that it appears in … Continue reading
Posted in AOP, Design Patterns, OOD, OOP, Software Reuse
Tagged AOP, Design Patterns, OOD, OOP, Software Reuse
4 Comments
Who is an Expert? – On Rules and Exceptions
It is relatively easy to find very young people who are brilliant programmers, who seem to know every detail about a particular language, platform or technology. Some of them will be able to implement a nice Android app in a … Continue reading
Divide-and-Conquer: Coping with Complexity
Sometimes a problem is simply too complex for us to solve. Our only chance seems to be breaking it into smaller parts that we know how to deal with. This strategy of reducing the complexity of a problem by dividing … Continue reading
Inheritance and the Power of Abstraction
Programming is an exercise in abstraction. If a program is intended to solve some problem, we must first be able to model this problem in an abstract way, in order to express it in a programming language. Only after the … Continue reading
The Liskov Substitution Principle and Test-Driven Development
The Substitution Principle, first defined by Barbara Liskov, says that: “Let q(x) be a property provable about objects x of type T. Then q(y) should be true for objects y of type S where S is a subtype of T.” … Continue reading
When a square is not a rectangle
In my previous post, I’ve used the example of squares and rectangles to illustrate the importance of definitions. It is clear that, from a geometric point-of-view, a square is indeed a kind of rectangle. However, as my friend Arnon has … Continue reading
