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The basic principles of object-oriented programming

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1. Single Duty: A class, only need to do one thing 2. Development closure: A class that should be extensible and non-modifiable 3. Dependency inversion: A class that should not be strongly dependent on another class. Each class is replaceable for another class. 4. Configure: Use the configuration as much as possible, not hard-coded. 5. Interface-Oriented programming: Only care about the interface, do not need to care about the implementation.

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The basic principles of object-oriented programming

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