Solid design principles
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SOLID is a popular set of five design principles for object-oriented software development. The principles are: Single Responsibility Principle, which states that a class should have one responsibility; Open/Closed Principle, which states that code should be open for extension but closed for modification; Liskov Substitution Principle, which states that subclasses should not break the functionality of parent classes; Interface Segregation Principle, which states that clients should not depend on interfaces they do not use; and Dependency Inversion Principle, which states that high-level modules should not depend on low-level modules and abstractions should not depend on details.
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Design principles - SOLID
This document discusses design principles for writing maintainable code, including the SOLID principles. It describes symptoms of bad design like rigidity, fragility, immobility and viscosity. It then explains each SOLID principle in detail: single responsibility principle, open closed principle, Liskov substitution principle, interface segregation principle, and dependency inversion principle. For each principle, it provides examples of how to apply the principle correctly and the benefits it provides, such as making code easier to change and reuse.
Solid Principles
The theory of SOLID principles was
introduced by Robert C. Martin in his 2000
paper “Design Principles and Design
Patterns”.
SOLID => Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, Dependency Inversion.
SOLID principles
The document discusses the SOLID principles of object-oriented design, which are Single responsibility principle, Open/closed principle, Liskov substitution principle, Interface segregation principle, and Dependency inversion principle. It provides examples of refactoring code based on these principles, such as extracting classes and interfaces to separate responsibilities and allow for extensibility. The document emphasizes that applying these principles helps make code more modular, reusable, and testable.
SOLID Design Principles
The document discusses the SOLID principles of object-oriented design:
1. The Single Responsibility Principle states that a class should have one, and only one, reason to change.
2. The Open-Closed Principle states that software entities should be open for extension but closed for modification. Behavior is changed through inheritance and composition rather than direct modification.
3. The Liskov Substitution Principle states that subclasses must behave in the same way as the base class so that the base class can be substituted wherever the subclass is expected.
4. The Interface Segregation Principle states that interfaces should be small and focused so that client classes do not depend on methods they do not use.
SOLID Design Principles applied in Java
Video: https://www.youtube.com/watch?v=0cU-4LrcWI0
SOLID Design Principles applied in Java: rules to develop scalable and easily maintainable code
Speaker: Ionut Bilica - Senior Software Developer @ Luxoft Romania.
During this talk we will discuss about the SOLID Principles described by Robert C. Martin, applying them in the Java programming language. Each principle will be explained in detail, with practical Java examples.
We will asses how these principles make it easy to develop the software for the entire duration of the project, and how some problems can appear if these principles are not applied. We will present common code fragments that do not respect these principles, and we'll see how we can correct them. Taking the SOLID principles into consideration, we will also analyse a real Java project using a Static Code Analyzer tool (e.g. STAN).
Finally, we will discuss the strategies on how to apply these design principles in "greenfield" projects, as well as "legacy" projects, while offering some tips and tricks.
Solid principles
The document discusses the SOLID principles of object-oriented design, which are a set of five design principles aimed at making software designs more understandable, flexible and maintainable. It defines each principle - Single Responsibility Principle (SRP), Open-Closed Principle (OCP), Liskov Substitution Principle (LSP), Interface Segregation Principle (ISP), and Dependency Inversion Principle (DIP). For each principle, it provides an example of how to apply the principle correctly and how to avoid violating it. The document emphasizes that following these principles helps produce code that is easier to maintain and extend over time.
Single Responsibility Principle
This presentation is based on a blog post I made:
http://eyalgo.com/2014/02/01/the-single-responsibility-principle/
More details are in that blog post.
I had a presentation at work with these slides.
Clean code: SOLID
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Recommended
Design principles - SOLID
This document discusses design principles for writing maintainable code, including the SOLID principles. It describes symptoms of bad design like rigidity, fragility, immobility and viscosity. It then explains each SOLID principle in detail: single responsibility principle, open closed principle, Liskov substitution principle, interface segregation principle, and dependency inversion principle. For each principle, it provides examples of how to apply the principle correctly and the benefits it provides, such as making code easier to change and reuse.
Solid Principles
The theory of SOLID principles was
introduced by Robert C. Martin in his 2000
paper “Design Principles and Design
Patterns”.
SOLID => Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, Dependency Inversion.
SOLID principles
The document discusses the SOLID principles of object-oriented design, which are Single responsibility principle, Open/closed principle, Liskov substitution principle, Interface segregation principle, and Dependency inversion principle. It provides examples of refactoring code based on these principles, such as extracting classes and interfaces to separate responsibilities and allow for extensibility. The document emphasizes that applying these principles helps make code more modular, reusable, and testable.
SOLID Design Principles
The document discusses the SOLID principles of object-oriented design:
1. The Single Responsibility Principle states that a class should have one, and only one, reason to change.
2. The Open-Closed Principle states that software entities should be open for extension but closed for modification. Behavior is changed through inheritance and composition rather than direct modification.
3. The Liskov Substitution Principle states that subclasses must behave in the same way as the base class so that the base class can be substituted wherever the subclass is expected.
4. The Interface Segregation Principle states that interfaces should be small and focused so that client classes do not depend on methods they do not use.
SOLID Design Principles applied in Java
Video: https://www.youtube.com/watch?v=0cU-4LrcWI0
SOLID Design Principles applied in Java: rules to develop scalable and easily maintainable code
Speaker: Ionut Bilica - Senior Software Developer @ Luxoft Romania.
During this talk we will discuss about the SOLID Principles described by Robert C. Martin, applying them in the Java programming language. Each principle will be explained in detail, with practical Java examples.
We will asses how these principles make it easy to develop the software for the entire duration of the project, and how some problems can appear if these principles are not applied. We will present common code fragments that do not respect these principles, and we'll see how we can correct them. Taking the SOLID principles into consideration, we will also analyse a real Java project using a Static Code Analyzer tool (e.g. STAN).
Finally, we will discuss the strategies on how to apply these design principles in "greenfield" projects, as well as "legacy" projects, while offering some tips and tricks.
Solid principles
The document discusses the SOLID principles of object-oriented design, which are a set of five design principles aimed at making software designs more understandable, flexible and maintainable. It defines each principle - Single Responsibility Principle (SRP), Open-Closed Principle (OCP), Liskov Substitution Principle (LSP), Interface Segregation Principle (ISP), and Dependency Inversion Principle (DIP). For each principle, it provides an example of how to apply the principle correctly and how to avoid violating it. The document emphasizes that following these principles helps produce code that is easier to maintain and extend over time.
Single Responsibility Principle
This presentation is based on a blog post I made:
http://eyalgo.com/2014/02/01/the-single-responsibility-principle/
More details are in that blog post.
I had a presentation at work with these slides.
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Solid principles
This document discusses the SOLID principles of object-oriented design:
- The Single Responsibility Principle states that a class should have one, and only one, reason to change.
- The Open/Closed Principle specifies that software entities should be open for extension but closed for modification.
- The Liskov Substitution Principle dictates that subclasses should behave in the same way as their parent classes.
- The Interface Segregation Principle indicates that client classes should not depend on interfaces they do not use.
- The Dependency Inversion Principle asserts that high-level modules should not depend on low-level modules, but both should depend on abstractions.
The presentation provides examples of
SOLID Design Principles
The document discusses the SOLID principles of object-oriented design: Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion. Each principle is explained in 1-2 sentences, potential anti-patterns are identified, and examples like jQuery and Rails are given to illustrate how the principles are applied. The overall purpose is to provide guidelines for creating reusable code through these foundational design concepts.
Solid principles
The document discusses the SOLID principles of object-oriented design, which are Single Responsibility Principle, Open Closed Principle, Liskov Substitution Principle, Interface Segregation Principle, and Dependency Inversion Principle. For each principle, it provides an example of how to apply the principle correctly and how violations of the principle can occur if it is not followed. It also lists some recommended reading materials on software design patterns and principles.
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The document discusses the open closed principle of object-oriented programming and design, which states that software entities like classes should be open for extension but closed for modification. This means that once a class is complete, its implementation can only be modified to fix errors, and new features require creating a new class rather than changing the existing one. An example is given to illustrate how applying the principle avoids issues that can arise from modifying existing classes, like breaking single responsibility, tests, APIs, and applications.
SOLID
This document provides an overview and examples of the SOLID principles of object-oriented design:
- SRP (Single Responsibility Principle) states that a class should have one, and only one, reason to change. Examples show extracting validation and email sending logic into separate classes.
- OCP (Open-Closed Principle) states that software entities should be open for extension but closed for modification. Examples use inheritance and interfaces to add new filtering logic without modifying existing classes.
- LSP (Liskov Substitution Principle) states that subclasses must be substitutable for their base classes. Examples show invalid implementations that break the base class contract.
- ISP (Interface Segregation Principle
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The document introduces the SOLID principles of object-oriented design, which are Single Responsibility Principle, Open-Closed Principle, Liskov Substitution Principle, Interface Segregation Principle, and Dependency Inversion Principle. It discusses each principle in detail and provides examples of how to apply them to refactor code and improve design. Design principles help create high-quality software by improving modularity, reusability, and maintainability of code. The SOLID principles in particular help achieve these goals and are fundamental for object-oriented design.
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- SOLID is an acronym that stands for five design principles introduced by Robert C. Martin. The principles are Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion.
- Applying these principles helps make software more maintainable, reusable, and understandable by reducing coupling between modules and increasing cohesion within modules. This addresses issues like rigidity, fragility, and immobility that make code difficult to change over time.
- The principles should be applied when refactoring existing code that shows signs of rot, such as code smells, in order to remove these
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Dependency Inversion Principle
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The document discusses the SOLID principles of object-oriented design, which are a set of five design principles intended to make software designs more understandable, flexible and maintainable. It defines each principle: single responsibility, open/closed, Liskov substitution, interface segregation, and dependency inversion. Following these principles helps produce code that is less complex, more readable, extensible, maintainable and reusable with looser coupling between modules and better testability compared to code not following these principles.
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Solid principles
This document discusses the SOLID principles of object-oriented design:
- The Single Responsibility Principle states that a class should have one, and only one, reason to change.
- The Open/Closed Principle specifies that software entities should be open for extension but closed for modification.
- The Liskov Substitution Principle dictates that subclasses should behave in the same way as their parent classes.
- The Interface Segregation Principle indicates that client classes should not depend on interfaces they do not use.
- The Dependency Inversion Principle asserts that high-level modules should not depend on low-level modules, but both should depend on abstractions.
The presentation provides examples of
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Solid principles
The document discusses the SOLID principles of object-oriented design, which are Single Responsibility Principle, Open Closed Principle, Liskov Substitution Principle, Interface Segregation Principle, and Dependency Inversion Principle. For each principle, it provides an example of how to apply the principle correctly and how violations of the principle can occur if it is not followed. It also lists some recommended reading materials on software design patterns and principles.
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This document provides an overview and examples of the SOLID principles of object-oriented design:
- SRP (Single Responsibility Principle) states that a class should have one, and only one, reason to change. Examples show extracting validation and email sending logic into separate classes.
- OCP (Open-Closed Principle) states that software entities should be open for extension but closed for modification. Examples use inheritance and interfaces to add new filtering logic without modifying existing classes.
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This document provides an overview of the SOLID principles of object-oriented design:
- SOLID is an acronym that stands for five design principles introduced by Robert C. Martin. The principles are Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion.
- Applying these principles helps make software more maintainable, reusable, and understandable by reducing coupling between modules and increasing cohesion within modules. This addresses issues like rigidity, fragility, and immobility that make code difficult to change over time.
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Dependency Inversion Principle
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The document discusses several object-oriented (OO) design principles including the single responsibility principle (SRP), open-closed principle (OCP), Liskov substitution principle (LSP), interface segregation principle (ISP), and dependency inversion principle (DIP). It also discusses design patterns, refactoring, and design by contract (DBC) as ways to prevent software decay over time and improve design quality. The key OO principles guide developers to create flexible, maintainable and reusable software designs.
Solid
This document discusses SOLID principles for object oriented design. It begins with an introduction of the author and overview of topics to be covered. It then reviews basic OOP concepts and code smells to refactor. The main section defines the five SOLID principles: single responsibility, open/closed, Liskov substitution, interface segregation and dependency inversion. For each, it provides a definition, examples of conforming and non-conforming code, and discusses how it improves design. It closes with other agile/OOP principles and inviting questions.
Design principle vs design patterns
Design Principle and Design Pattern examples on C# .NET Core.
(Note: Not all the contents are original, I copied some of them from online tutorials while learning and found great explanations. A great thanks to all for this information.)
SOLID principles-Present
This document outlines the SOLID principles of object-oriented design, including Single Responsibility Principle, Open-Closed Principle, Liskov Substitution Principle, Interface Segregation Principle, and Dependency Inversion Principle. It defines each principle, provides examples, and discusses the benefits, such as increasing reusability, making code more extensible and flexible, and reducing coupling between modules. Applying these principles helps create software that is well-designed and able to easily handle changes, improving developer and customer satisfaction.
Solid principles
SOLID is a mnemonic device for 5 design principles of object-oriented
programs (OOP) that result in readable, adaptable, and scalable code.
S - Single Responsibility Principle.
O - Open Closed Principle.
L - Liskov Substitution Principle.
I - Interface Segregation Principle.
D - Dependency Inversion Principle.
OO Design Principles
object oriented design principles,
COUPLING & COHESION,
Open-Closed (open for extension; closed for modification) Principle
Liskov Substitution Principle (LSP)
Dependency Inversion Principle (DIP)
Single Responsibility Principle (SRP)
Interface Segregation Principle (ISP)
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Solid design principles
- 1. SOLID DESIGN PRINCIPLES SETS OF DESIGN PRINCIPLES IN OBJECT-ORIENTED SOFTWARE DEVELOPMENT
- 2. WHAT IS SOLID? SOLID is one of the most popular sets of design principles in object-oriented software development. It’s a mnemonic acronym for the following five design principles: Single Responsibility Principle Open/Closed Principle Liskov Substitution Principle Interface Segregation Principle Dependency Inversion
- 3. SINGLE RESPONSIBILITY PRINCIPLE Robert C. Martin describes it as: ‘’A class should have one, and only one, reason to change.’’ Do you know Robert? Robert C. Martin, colloquially known as "Uncle Bob", is an American software engineer and instructor. He is best known for being one of the authors of the Agile Manifesto and for developing several software design principles. Recommend to check his blog: http://blog.cleancoder.com/
- 4. SINGLE RESPONSIBILITY PRINCIPLE Why should you use it and what happens if you ignore it? Frequency and effects of changes Easier to understand
- 5. SINGLE RESPONSIBILITY PRINCIPLE A simple question to validate your design ‘’What is the responsibility of your class/component/microservice?’’ Here is an example
- 6. OPEN/CLOSED PRINCIPLE “Software entities (classes, modules, functions, etc.) should be open for extension, but closed for modification.”
- 7. OPEN/CLOSED PRINCIPLE It tells you to write your code so that you will be able to add new functionality without changing the existing code. That prevents situations in which a change to one of your classes also requires you to adapt all depending classes. Here is an exmple.
- 8. LISKOV SUBSTITUTION PRINCIPLE Child classes should never break the parent class' type definitions. Or Subtypes must be substitutable for their base types.
- 9. INTERFACE SEGREGATION PRINCIPLE “Clients should not be forced to depend upon interfaces that they do not use.”
- 10. DEPENDENCY INVERSION PRINCIPLE 1. High-level modules should not depend on low-level modules. Both should depend on abstractions. 2. Abstractions should not depend on details. Details should depend on abstractions.
- 11. THANKS FOR YOUR ATTENTION MAHMOUD ASADI . ASADI.PUB@GMAIL.COM