3 |
2 |
3 |
6 | Crafting brilliance through low-level design mastery. 7 |
8 |
9 | 
15 |
16 |17 | 18 |
19 |LOW-LEVEL-DESIGN-PATTERNS/98 |113 |99 |
112 |100 | 103 |builder-design-pattern.cpp 101 |- Demonstrates the Builder design pattern for creating complex objects step by step 102 |
- Encapsulates object construction, enabling easy management and extension
- Concrete builders like EngineeringStudentBuilder and MBAStudentBuilder set specific attributes for different types of students
- Main function showcases building and printing details of Engineering and MBA students.104 | 107 |singleton-design-pattern.cpp 105 |- Implements singleton design patterns for database connections with eager, lazy, and double-checked locking initialization methods 106 |
- Provides global access to single instances of classes, ensuring thread safety and efficient resource usage
- Demonstrates different strategies for creating and accessing singleton objects in the codebase architecture.108 | 111 |factory-design-pattern.cpp 109 |- Implements Factory Pattern to create various shapes like Circle, Square, and Rectangle 110 |
- Defines Shape superclass with draw method and concrete classes for each shape
- ShapeFactory class generates shape objects based on input strings
- Demonstrates pattern usage by creating a Rectangle object and calling its draw method.
117 |160 |118 |
159 |119 | 122 |strategy-design-pattern.cpp 120 |- Demonstrates the Strategy Design Pattern for dynamic driving behaviors in vehicles 121 |
- Encapsulates various driving strategies (e.g., Sport, Normal, Passenger) as separate classes
- The Vehicle class can change strategies dynamically, promoting flexibility and scalability without modifying the Vehicle class itself.123 | 126 |template-design-pattern.cpp 124 |- Implements a Template Method Design Pattern for payment processing 125 |
- Defines a base class with common steps and abstract methods for subclasses to implement specific payment types
- Demonstrates sending money to a friend and a merchant by overriding the template methods
- Executed through instances of PayToFriend and PayToMerch classes.127 | 130 |observer-design-pattern.cpp 128 |- Implements observer design pattern for stock updates 129 |
- Defines observables for iPhone and Samsung stocks, with mobile and email alert observers
- Demonstrates notifications to observers based on stock count changes.131 | 134 |chain-of-responsibility-design-pattern.cpp 132 |- Implements a Chain of Responsibility design pattern for logging messages based on their severity levels 133 |
- The code defines different log processors for handling INFO, DEBUG, and ERROR messages in a chain
- By passing messages through the chain, it ensures that each message is processed by the appropriate log processor without the sender needing to know the specific handler.135 | 138 |mediator-design-pattern.cpp 136 |- Demonstrates the Mediator Design Pattern, fostering loose coupling between objects by centralizing communication through a mediator 137 |
- Objects interact indirectly via the mediator, enhancing system maintainability and flexibility
- The code showcases how bidders in an auction place bids and receive notifications through the mediator, streamlining communication and reducing dependencies.139 | 142 |interpreter-design-pattern.cpp 140 |- Demonstrates the Interpreter Design Pattern by evaluating complex mathematical expressions using terminal and non-terminal expressions within a defined context 141 |
- The code creates a context to store variable values, constructs expressions for multiplication and addition, and outputs the result of the expression evaluation.143 | 146 |command-design-pattern.cpp 144 |- Implements the Command Design Pattern to decouple command execution from command producers 145 |
- Defines commands for an Air Conditioner, allowing operations like turning on/off and setting temperature
- Utilizes an invoker class to manage and execute commands, showcasing features like undo/redo functionality.147 | 150 |visitor-design-pattern.cpp 148 |- Implements Visitor Design Pattern to separate operations (pricing, maintenance) from room classes 149 |
- Defines visitors for different room types to perform specific operations without modifying room classes
- Main function demonstrates pricing and maintenance operations on single, double, and deluxe rooms using respective visitor instances.151 | 154 |iterator-design-pattern.cpp 152 |- Implements the Iterator Design Pattern to enable sequential access to a collection of books without exposing its structure 153 |
- The code defines classes for books, iterators, and libraries, showcasing how to iterate over and print book names in a library using an iterator.155 | 158 |momento-design-pattern.cpp 156 |- Demonstrates the Memento Design Pattern by enabling objects to be restored to previous states without revealing implementation details 157 |
- The code showcases saving and restoring object states using Mementos managed by a CareTaker, facilitating undo/redo functionality within the project's architecture.
164 |195 |165 |
194 |166 | 169 |flyweight-design-pattern.cpp 167 |- Demonstrates the Flyweight Design Pattern to optimize memory usage by sharing common data among similar objects 168 |
- The code defines interfaces for letters, concrete letter implementations, and a factory to manage object creation and reuse
- By creating and displaying letters using the factory, it showcases efficient memory utilization through object sharing.170 | 173 |bridge-design-pattern.cpp 171 |- Demonstrates the Bridge Design Pattern by decoupling abstractions from implementations, allowing independent variation 172 |
- Defines breathing processes for land and water entities, showcasing how Dogs and Fish can use different implementors
- This promotes extensibility and flexibility in managing diverse living things.174 | 177 |flyweight-design-pattern-with-singleton-concept.cpp 175 |- Demonstrates the Flyweight Design Pattern by efficiently managing memory usage through object sharing 176 |
- The code showcases the creation and reuse of letter objects using a Singleton Factory, emphasizing memory optimization for large quantities of similar objects.178 | 181 |decorator-design-pattern.cpp 179 |- Implements the Decorator Design Pattern for pizzas, allowing dynamic addition of toppings to base pizza objects 180 |
- Demonstrates how to enhance pizza objects with Mushroom and Cheese toppings while maintaining scalability and reusability in the codebase architecture.182 | 185 |adapter-design-pattern.cpp 183 |- Implements the Adapter Design Pattern to bridge incompatible interfaces, converting weight from pounds to kilograms 184 |
- The code creates classes for weighing machines in pounds and kilograms, demonstrating adaptation between the two units.186 | 189 |proxy-design-pattern.cpp 187 |- Implements a Proxy Design Pattern to control access to an Employee Database 188 |
- The code defines classes for Employee, EmployeeDB, EmployeeDBImpl, and EmployeeDBProxy
- The proxy restricts access based on client permissions, allowing creation and retrieval of employee records
- The main function demonstrates creating an employee record and retrieving it based on client roles.190 | 193 |composite-design-pattern.cpp 191 |- Demonstrates the Composite Design Pattern by creating a hierarchical structure of directories and files 192 |
- Allows uniform treatment of individual objects and compositions
- Enables representing part-whole hierarchies where files and directories are handled uniformly
- The code showcases how directories can contain files and subdirectories in a tree-like manner.