Designing in a modular way
In the early stages of designing an application, one of the most important steps is to decide on the functionality that the application needs to provide. This of course, is based on the overall purpose of the application and the type of application that you are designing.
Based on such requirements, in the design phase, you should try to break down the overall functionality (the big picture) of the application into smaller and specialized pieces. Then, you can determine if such pieces already exist, either in the form of third-party libraries or the code that you have already written for a different application.
If you already have your own chunks of reusable code designed in a modular fashion (most third-party libraries ...
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