S = Single Responsibility Principle
O = Open Close Principle
L = Liskov Substitution Principle
I = Interface Segregation Principle
D = Dependency inversion Principle
O = Open Close Principle
L = Liskov Substitution Principle
I = Interface Segregation Principle
D = Dependency inversion Principle
SINGLE RESPONSIBILITY PRINCIPLE (SRP) :
The single responsibility principle (SRP) states that every class or module in a program should have responsibility for just a single piece of that program's functionality.
Example:
BAD DESIGN :
BAD CODE:
GOOD DESIGN :
GOOD CODE :
OPEN CLOSE PRINCIPLE (OCP):
In object-oriented programming, the open/closed principle states "software entities (classes, modules, functions, etc.) should be open for extension, but closed for modification"; that is, such an entity can allow its behavior to be extended without modifying its source code.
BAD DESIGN :
BAD CODE :
GOOD DESIGN:
GOOD CODE:
LISKOV SUBSTITUTION PRINCIPLE (LSP):
The Liskov Substitution Principle (LSP) functions that use pointers to base classes must be able to use objects of derived classes without knowing it. The Liskov Substitution Principle is a way of ensuring that inheritance is used correctly.
BAD DESIGN:
BAD CODE:
GOOD DESIGN:
GOOD CODE:
INTERFACE SEGREGATION PRINCIPLE(ISP):
Interface segregation principle. In the field of software engineering, the interface-segregation principle (ISP) states that no client should be forced to depend on methods it does not use.
BAD DESIGN:
BAD CODE:
GOOD DESIGN:
GOOD CODE:
DEPENDENCY INVERSION PRINCIPLE(DIP):
The general idea of this principle is as simple as it is important: High-level modules, which provide complex logic, should be easily reusable and unaffected by changes in low-level modules, which provide utility features. To achieve that, you need to introduce an abstraction that decouples the high-level and low-level modules from each other.
BAD DESIGN:
BAD CODE:
GOOD DESIGN:
GOOD CODE:
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