inheritence

Do you REALLY know what SOLID principles means? Think again! (#3: Exclusive Truth about Liskov Substitution Principle)

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Liskov Substitution Principle

Liskov Substitution Formal definition of Liskov substitution principle is –Let φ(x) be a property provable about objects x of type T. Then φ(y) should also be true for objects y of type S where S is a sub-type of T. Or we can say – If class A is a sub-type of class B, then … Read more

Do you REALLY know what SOLID principles means? (#2: Exclusive Truth about Open Closed Principle)

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open closed principle

Introduction The Open/Closed Principle (OCP) is a core concept in object-oriented design, stating that software entities—such as classes, modules, and functions—should be “open for extension but closed for modification.” Introduced by Bertrand Meyer in 1988 and later popularized by Robert C. Martin in the early 2000s as part of the SOLID principles, the OCP emphasizes … Read more

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