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[Java] What’s in the Java SE Bronze exam

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Java SE Bronze Exam Content Introductory qualification for inexperienced people. It aims to evaluate having a basic knowledge of object oriented programming...

[Java] Prototype pattern

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Protytype pattern Instead of creating an instance from a class, it creates another instance from one. Create a new instance based on the model instance that...

[Ruby] Points to note when writing programs: Part 3

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Points to note when writing programs: Part 3 1. Conclusion 2. What is Liskoff’s replacement principle? 3. Why is the Liskov replacement principle necessar...