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Inversion of control - Wikipedia
Finding new abstractions is difficult. In general, it seems that an abstraction is usually discovered by generalizing from a number of concrete examples. An experienced designer can sometimes invent an abstract class from scratch, but only after having implemented concrete versions for several other projects.

This is probably unavoidable. Humans think better about concrete examples then about abstractions. We can think well about abstractions such as integers or parsers only because we have a lot of experience with them. However, new abstractions are very important. A designer should be very happy whenever a good abstraction is found, no matter how it was found.
programming  ioc 
9 weeks ago
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