Timeline for Is there a pattern to describe a class that symbolises an instance of an instance of another class?

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Jul 8, 2018 at 12:23	comment	added	Jan Hettenkofer		Yes, that's kind of the problem. In TypeScript/JavaScript everything except primitives is a reference and while you can create a copy of the object, it will only be a shallow copy (meaning properties stay references to the original object's properties). This means that once I copy all the things that need copying, the code will be rather error prone. I learned programming with C and C++ and more often than not, I wish TS/JS were a bit more like them.
Jul 8, 2018 at 12:04	comment	added	kamikaze		I'm not familiar with type script. If you need to mutate the template instance I would have used composition and copy constructed the dependency. But this is a C++ answer and it sounds like it's not applicable.
Jul 8, 2018 at 10:19	comment	added	Jan Hettenkofer		Thanks for your answer. It's true that a Job and a Template are very similar and it makes some sense to have Job inherit from Template. The way I originally built it (before asking the question) is actually quite close to the dependency injection approach. However this didn't quite work since the templateFields[] used by the Job needs to be partially independent of the Template's templateFields[] (namely, the values shouldn't carry over to other Jobs using the same template and TypeScript doesn't have a simple way to create deep copies). I will post an answer with the solution I came up with.
Jul 7, 2018 at 0:34	history	answered	kamikaze	CC BY-SA 4.0