As I was reading some articles, websites for my previous assignments, I came across the term refactoring a lot. However, that was not the only time seeing that as it is part of the course syllabus. I decided to learn more about refactoring and write something on it for my weekly blog post. After going through some resources, articles I finally settled on this blog post that talks about refactoring. The structure of this blog is made simple, easy to learn and understand especially for beginners and those new to the term. It also provides links to some terms, books and some other IDEs mentioned.

This blog defines refactoring as the process that involves editing and cleaning up previously written software codes without changing the function of the code at all. Blog talks about the importance of refactoring, reasons for refactoring and how to perform refactoring. It also provides some techniques on how to perform refactoring. Each technique is well explained and broken down into subtopics and/or steps with some diagrams provided. Also, blog talks about when refactoring is not needed, best practices for refactoring and general summary refactoring.

In this blog I learned that the basic purpose of refactoring is to make codes efficient and maintainable, reduce technical cost, improves readability, and help prevent future bugs. A term that I found interesting as I was reading about the importance of code refactoring is code rot. Further research from Wikipedia explained it as a software decay that is a slow deterioration of software quality over time leading to software becoming unusable or in need of upgrade. Refactoring is important as it help to avoid this code rot.

I also learn that the best time to refactor is before any update or additions to an existing code. This is so as it improves the quality of code and should be done in small steps as possible. Other practices include planning refactoring project and timeline carefully, testing frequently and involving Quality Assurance teams and striving to focus on progress.

I thought that refactoring is always needed especially dealing with very high coded software programs and systems, but I learned from this blog that refactoring is not needed when an application needs to be completely improved.

Some techniques of refactoring I learned are Red-Green Refactor, Refactoring by Abstraction, Composing and Simplifying methods. Before applying the Red-Green Refactor technique, there should first be consideration of what needs to be developed. These developments need to pass basic testing before improvements can be implemented. Refactoring by abstraction is used when there is a large amount of refactoring to be done. I learned that extraction, one of the processes in Composing method, involves breaking down of codes into smaller pieces to find and extract fragmentation. This code is then removed to a separate method and replaced by a call to a new method. This process also involves classes, interface and local variables.

I hope others find this blog useful as well.

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