meowrain's blog

This is a book note on "Dive Into Design Patterns" that explains the concept of design patterns in software design. Design patterns are reusable design ideas and methods that solve common design problems. The book covers different types of patterns and discusses the importance of code reusability and scalability. It also emphasizes the use of encapsulation to isolate and protect parts of a program from changes. Encapsulation can be done on a method or class level. The book recommends programming to interfaces and using composition over inheritance to avoid limitations. It also mentions the SOLID principles and the Single Responsibility Principle for better code maintainability. The code example provided demonstrates compliance with the Single Responsibility Principle by having a FileManager class that writes data to a file.