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In this post, I summarize the different programming paradigms which I learned from reading the book “Clean Architecture A Craftsman’s guide to Software Structure and Design” by Robert Martin. The programming paradigms are structured programming, object oriented programming and functional programming.
Continue readingInheritance is something that comes up quite often during my programming experience. Whenever I have classes that share some logic or properties, I think of inheritance. However, sometimes, using inheritance ends up making a design more brittle. Through my experience and reading, I have learned a few things about inheritance.
Continue readingIn a project I work on, I need to programmatically fill out some PDF forms. The forms are very similar in terms of structure, content, and fields’ names. Using iTextSharp library, I can go through the fields in the PDF and set the values. The logic for filling out a PDF form can be generic, as I just need to know what are the fields’ names and the corresponding values of the PDF. I come up with a generic model and common logic for filing out the form, as demonstrated in the below snippets.
Continue readingIn October 1987, Barbara Liskov published a research paper in which she discussed about different but related concepts: data abstraction, inheritance, encapsulation, implementation hierarch, type hierarchy and polymorphism. I’ve found the paper to be insightful and informative. In this post, I simply give a recap of what I have learned and share my thoughts from reading the paper.
Continue readingIn the previous post, I wrote about Barbara Liskov research paper on data abstraction and hierarchy. In the paper, the author states a property which exists between type and subtype. That property later becomes known as the Liskov Substitution Principle. In this post, I continue to go over the principle in more details and give examples. The principle is one out of the five software design principles in SOLID: