This is the fifth and last article describing SOLID principles. This article is about the Single Responsibility principle. Hopefully it will help you understand what the principle is all about and why it’s important to keep it in mind when designing and writing your code.

What is the Single Responsibility principle?

Here is the definition from Wikipedia: The term was introduced by Robert C. Martin in an article by the same name as part of his Principles of Object Oriented Design, made popular by his book Agile Software Development, Principles, Patterns, and Practices. Martin described it as being based on the principle of cohesion, as described by Tom DeMarco in his book Structured Analysis and Systems Specification. Continue reading →