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General, reusable solutions to common problemsNot a complete, finished solutionA template, recipe, or approach to solving certain problemsEach has a specific name, so we can discuss common elements of design using a common vocabulary
Learning anything – a musical chord, a martial arts technique, etc.Zero: You used a what? Never heard of it.Awakening:Wow, I just learned how XYZ pattern can improve my design. I’m not really sure where it would work in my code, but I’m definitely looking.Overzealous:I totally “get” the XYZ pattern; I’m adding it everywhere I can shoehorn it into my code. My design’s gonna be better now, for sure!Mastery: In response to some specific design pain points, the XYZ pattern was a logical next step and was achieved through a simple refactoring.
Design pattern names provide placeholders or complex abstractions and sets of refactorings. Consider the difference between:We have some tight coupling to the database here. We can probably fix it if we apply these refactorings;extract an interface, extract a method, Extract a class,Replace local with parameterORLet’s apply the Repository pattern to fix it.
It’s possible for the new Singleton(); line to be called more than once.