![Design pattern](https://storage.googleapis.com/gcdn.copaste.net/materials/8f0d67e1350d4586f1c0463aae2e7b56/52376/150x194/default.jpg)
Design pattern
“Each pattern describes a problem which occurs
over and over again in our environment, and then
describes the core of the solution to that problem,
in such a way that you can use this solution a
million times over, without ever doing the same
thing t
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