Elegant Software Design Principles
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Elegant Software Design Principles

About the Book

Professionals who design and develop elegant software do so by mastering a set of important principles. This book describes 50 such essential design principles. Every software architect and developer should be familiar with these principles.

It answers the following questions:

What is elegant software?

How to assess the quality of a software design?

How to improve a specific quality of a software design?

How to determine when to apply a principle?

How to determine whether a principle is properly applied or not?

It is a handy reference for the 50 essential design principles.

 "One of the best Software books of all time" - BookAuthority

About the Author

Narayanan Jayaratchagan
Narayanan Jayaratchagan

Narayanan Jayaratchagan has more than 21 years of programming and software development experience. He has worked on various programming paradigms including Structured, Functional and Object-Oriented programming. He is passionate about researching software engineering literature. He finds it fascinating to explore the original sources and contributors of programming principles, patterns and best practices. He is an avid code reader. He explores the source code of JDK and other open source projects for pattern mining as a hobby.

Table of Contents


        Elegant Software
	Design Pyramid
	The Familiar Face – Tactical Knowledge
	The Ideal Face – Strategic Knowledge
	The Real Face – Practical Knowledge
	Principles Catalogue
	Principle Documentation Template

The Driving Principles
	Manage Complexity (MAC)
	High Cohesion (HIC)
	Loose Coupling (LCO)

Core Principles	
	Abstraction (ABS)	
	Information Hiding (IFH)	
	Encapsulation (ENC)	
	Inheritance (INH)	
	Polymorphism (POL)	
	Don’t Repeat Yourself (DRY)	
	Program to an Interface (P2I)	
	Composite Reuse Principle (CRP)	
	Encapsulate What Varies (EWV)	
	Modularity Principle (MOD)	
	Closed Layered Architecture Principle (CLA)	
	Separation of Concerns (SoC)	
	Separate Policy and Implementation (SPI)	
	Separate Interface and Implementation (SII)	
	Divide-and-Conquer (DAC) 
	Inversion of Control (IOC)	
	Plug and Play (PnP)	
	Modular Protection (MOP)	
	Discrimination Principle (DP) 

SOLID Principles	
	Single Responsibility Principle (SRP)	
	Open Closed Principle (OCP)	
	Liscov Substitution Principle (LSP)	
	Interface Segregation Principle (ISP)	
	Dependency Inversion Principle (DIP)	

GRASP Principles	
	Tell Don’t Ask (TDA)	
	Creator (CRE)	
	Pure Fabrication (PUF)	
	Reliability Principles	
	Precondition Principle (PRP)	
	Postcondition Principle (POP)	

Reliability Principles
	Class Invariant Principle (CIP)	
	Non-Redundancy Principle (NRP) 
	Command-Query Separation Principle (CQS)	
	Principle of Closed Behaviour (PCB)	
	Immutability (IMM)	
	No Side Effects Principle (NSE)	
	Disciplined Exception Handling (DEH)	
	Design for Testability (DFT)	 

Package Design Principles 
	Release Reuse Equivalency Principle (REP)	
	Common Closure Principle (CCP)	
	Common Reuse Principle (CRP)	
	Acyclic Dependencies Principle (ADP)	
	Stable Dependencies Principle (SDP)	
	The Stable Abstraction Principle (SAP)	

General Principles	
	Principle of Least Astonishment (PLA)	
	Law of Demeter (LOD)	
	Reuse Path Principle (RPP)	
	Documentation Principle (DOP)	

About the Author

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