Several outstanding books have already been written for example Learning JavaScript Design Patterns (Volume 1.7.0 is completely free online) by Addy Osmani. But the examples are too bland for me. He should have kade use of more real-world examples especially from frameworks. There is also a great website called refactoring.guru giving one a taste of design patterns (also inspired by GoF) or the full book for a small price but he uses fucking cats and other dumb real-world objects to demonstrate use-cases in UML. UML is too much of an abstraction. Beginners to intermediate programmers need real-world example to really grasp the core ideas.
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Now comes the point where you must read books about patterns, and to my opinion, it is a complete waste of time trying too hard. I only understood patterns really well after noticing I did something similar, or I could apply that to existing code. Without the safety tests, or habits of refactoring, I would have waited until a new project. The problem of using patterns in a fresh project is that you do not see how they impact or change a working code. I only understood a software pattern once I refactored my code into one of them, never when I introduced one fresh in my code.
Practice practice practice. I think 4 to 5 books is even an excessive reading exercise without some good amount of practising. Best way to do this, I believe, is to start refactoring your current projects using the patterns. Or if you don't have any projects you're actively working on then just do it your own way and then try refactoring to patterns.
Software architects, like judges, as a matter of course run into situations in which what at first appeared to be an elegant categorization no longer meets the needs of a new fact pattern or use case. Agile development processes as well as hybrid methods of software development such as the Unified Software Development Process (USDP) recognize and accept the process of revising models, called refactoring. Recently the software industry has begun to note certain similarities and patterns in what constitutes good models and how refactoring can bring about model improvements. Unlike the profession of law, the profession of software engineering has seen the development of documented, systematic methods for refactoring to bring about consistent results.
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