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by Mike FriedmanGood software design principles tell us that we should work to separate unrelated co
ncerns. For example, the popular Model-View-Controller (MVC) pattern is common in web application designs. In MVC, separate modular components form a model, which provides access to a data source, a view, which presents the data to the end user, and a controller, which implements the required features.Ideally, it’s possible to replace any one of these components without breaking the 
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