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Restructed to develop a more rounded knowledge reference base.
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‎LICENSE‎

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The MIT License (MIT)
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Copyright © 2025 rfsJim
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.

‎README.md‎

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# Software design patterns in Typescript
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Example code for design patterns. Where it makes sense classes and themes are continued across patterns.
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These aren't supposed to be fully functioning source code but templates, examples, and descriptions to assist in solving problems.
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The 23 Gang of Four (`GoF`) design patterns fall into three big camps:
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1. Creational Patterns
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2. Structural Patterns
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3. Behavioral Patterns
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## Creational Patterns
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How do we create objects in a flexible way?
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- Singleton – only one instance allowed
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- Simple Factory - Honourable mention not a true pattern
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- Factory Method – let a method decide which subclass to instantiate
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- Abstract Factory – a factory of related factories
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- Builder – step-by-step construction
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- Prototype – clone existing objects
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## Structural Patterns
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How do we organise objects and classes?
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- Adapter – convert one interface to another (e.g., old plug to new socket)
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- Bridge – separate abstraction from implementation
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- Composite – tree structure (like folders & files)
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- Decorator – wrap stuff to add behaviour, used to attach additional responsibilities to an object dynamically.
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- Facade – a simple front for complex subsystems
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- Flyweight – reuse shared objects to save memory
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- Proxy – control access to an object (security, lazy loading etc.)
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## Behavioral Patterns
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How do objects communicate and behave?
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- Strategy – swap algorithms at runtime, defines family of algorithms encapsulates each one and makes them interchangeable.
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- Observer – event listeners / publish-subscribe. Defines one to many dependency between objects so that when one object changes state all it's dependents are notified.
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- Command – encapsulate actions as objects
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- Chain of Responsibility – pass requests down a chain
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- Interpreter – language grammar representation
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- Iterator – go through elements without exposing the structure
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- Mediator – centralised communication between objects
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- Memento – capture and restore object state
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- State – change behaviour based on internal state
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- Template Method – define skeleton of an algorithm with steps filled in by subclasses
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- Visitor – add operations to objects without changing them
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# 🧠 Software Development Handbook
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## ✨ Foreword
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Software development is part art form, part mathematics, part science — and part vibe.
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This handbook is a curated collection of what I’m learning: design patterns, algorithms, data structures, and foundational concepts.
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It’s part learning tool, part long-term reference.
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It will grow as my knowledge and skills grow. I hope you find something useful in here, too — as I follow in the footsteps of giants and explore the endless world of code.
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![Following in the footsteps of giants](assets/memes/standing_upon_shoulders_of_giants.jpg)
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## 📚 Sections
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### 🎨 Design Patterns
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Structured approaches to common software architecture challenges. Based on the **Gang of Four** (`Gof`) patterns.
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- **Creational**
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- [Singleton](design_patterns/creational/singleton.ts)
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- [Factory Method](design_patterns/creational/factory.ts)
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<!-- - [Abstract Factory](design_patterns/creational/abstract_factory.md) -->
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- **Structural**
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- [Decorator](design_patterns/structural/decorator.ts)
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- [Proxy](design_patterns/structural/proxy.ts)
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<!-- - [Adapter](design_patterns/structural/adapter.md) -->
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<!-- - [Composite](design_patterns/structural/composite.md) -->
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- **Behavioral**
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- [Strategy](design_patterns/behavioral/strategy.ts)
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- [Observer](design_patterns/behavioral/observer.ts)
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<!-- - [Command](design_patterns/behavioral/command.md) -->
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📄 [Full Pattern Index](design_patterns/README.md)
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---
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### ⚙️ Algorithms & Data Structures
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Code implementations of core computer science techniques.
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![How I feel writing this repo](assets/memes/no_idea_dog.jpg)
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- **Sorting Algorithms**
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<!-- - [Bubble Sort](algorithms/sorting/bubble_sort.js)
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- [Quick Sort](algorithms/sorting/quick_sort.js)
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- [Merge Sort](algorithms/sorting/merge_sort.js)
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- [Radix Sort](algorithms/sorting/radix_sort.js) -->
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- **Searching Algorithms**
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<!-- - [Binary Search](algorithms/searching/binary_search.js)
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- [Linear Search](algorithms/searching/linear_search.js) -->
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- **Recursion**
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<!-- - [Factorial](algorithms/recursion/factorial.js) -->
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- **Data Structures**
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<!-- - [Hash Table](algorithms/data_structures/hash_table.js)
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- [Linked List](algorithms/data_structures/linked_list.js)
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- [Stack](algorithms/data_structures/stack.js) -->
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📄 [Full Algorithm Index](algorithms/README.md)
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---
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### 🧩 Core Programming Concepts
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In-depth notes and examples of important programming fundamentals.
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<!-- - [Callback](concepts/callback.md)
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- [Closure](concepts/closure.md)
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- [Event Loop](concepts/event_loop.md) -->
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---
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## 🔄 Contributions
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This repo is intended as a personal learning journal, but feel free to open issues or PRs if you spot something helpful to add or improve.
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---
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## 📜 License
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[MIT](LICENSE)

‎assets/memes/no_idea_dog.jpg‎

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‎assets/memes/standing_upon_shoulders_of_giants.jpg‎

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‎design_patterns/README.md‎

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# Software design patterns in Typescript
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Example code for design patterns. Where it makes sense classes and themes are continued across patterns.
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These aren't supposed to be fully functioning source code but templates, examples, and descriptions to assist in solving problems.
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The 23 Gang of Four (`GoF`) design patterns fall into three big camps:
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1. Creational Patterns
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2. Structural Patterns
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3. Behavioral Patterns
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## Creational Patterns
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How do we create objects in a flexible way?
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14+
- Singleton – only one instance allowed
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- Simple Factory - Honourable mention not a true pattern
16+
- Factory Method – let a method decide which subclass to instantiate
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- Abstract Factory – a factory of related factories
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- Builder – step-by-step construction
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- Prototype – clone existing objects
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## Structural Patterns
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How do we organise objects and classes?
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- Adapter – convert one interface to another (e.g., old plug to new socket)
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- Bridge – separate abstraction from implementation
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- Composite – tree structure (like folders & files)
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- Decorator – wrap stuff to add behaviour, used to attach additional responsibilities to an object dynamically.
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- Facade – a simple front for complex subsystems
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- Flyweight – reuse shared objects to save memory
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- Proxy – control access to an object (security, lazy loading etc.)
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## Behavioral Patterns
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How do objects communicate and behave?
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- Strategy – swap algorithms at runtime, defines family of algorithms encapsulates each one and makes them interchangeable.
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- Observer – event listeners / publish-subscribe. Defines one to many dependency between objects so that when one object changes state all it's dependents are notified.
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- Command – encapsulate actions as objects
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- Chain of Responsibility – pass requests down a chain
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- Interpreter – language grammar representation
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- Iterator – go through elements without exposing the structure
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- Mediator – centralised communication between objects
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- Memento – capture and restore object state
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- State – change behaviour based on internal state
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- Template Method – define skeleton of an algorithm with steps filled in by subclasses
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- Visitor – add operations to objects without changing them

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