Design Patterns - Singleton Pattern | Explanation and Implementation in C++

►Software Design and Design Patterns Playlist: https://www.youtube.com/playlist?list=PLvv0ScY6vfd9wBflF0f6ynlDQuaeKYzyc
►Find full courses on: https://courses.mshah.io/
►Join as Member to Support the channel: https://www.youtube.com/channel/UCA64pZbN5Mz5NxC3SO4qpDg/join

►Git Repo: https://github.com/MikeShah/DesignPatterns
►Lesson Description: In this lesson I show you how to implement a creational design pattern in C++ known as the singleton. This is a controversial pattern to many in that it can be misused, however, the pattern itself can be useful when we truly need only 1 point of access for a specific class (e.g., a file system or logger). This lesson will also refresh you on the idea of 'static' which is a clean way to implement the singleton pattern.

Useful resource on understanding static https://en.cppreference.com/w/cpp/language/storage_duration

00:00 Design Patterns are not perfect
00:58 Creational Design Pattern
2:25 Sample Logger Class
4:10 Creating multiple instances of an object
5:15 Utilizing access modifiers of class for constructor
6:06 Idea of a GetInstance member function
7:06 The static keyword
7:50 static function example
10:22 Practical use case of static in a class
11:00 Initializing static member variables
13:30 A static pointer to instance of our class as member variable
15:40 Utilizing a member function from our single instance
16:50 Creating a static member function
17:37 Implementing our logger class
19:10 Allocating memory for our pointer
20:50 Adding messages to our logger
22:18 Careful with returning pointers to member variables
24:20 Design to protect your clients of your API
25:10 Create the static variable within GetInstance
27:30 Other design considerations and closing

►YouTube Channel: https://www.youtube.com/c/MikeShah
►Please like and subscribe to help the channel!
►Join our free community: https://courses.mshah.io/communities/Q29tbXVuaXR5LTI3MzAz