Design Patterns - Command 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 teach you one of the most powerful behavioral design patterns, the command pattern. This pattern models objects to act as a command, and it is one of the most convenient ways to store a series of 'commands' or actions that happen throughout your program. I will show you a use case of using the pattern to store commands as a queue, and this pattern could be used to elegantly implement and undo/redo system. Free resource: https://gameprogrammingpatterns.com/command.html 00:00 What are Design patterns 00:30 Behavioral Design Patterns 1:00 Command Pattern 1:30 Command Patterns uses 1:59 Design Pattern Resources 2:50 Conceptual Understanding of command pattern 4:00 A game controller example 4:40 Utilizing inheritance for is-a relationship 5:20 Key idea of what a command does 5:50 C++ explanation of virtual 6:30 Enqueing commands in some data structure 7:40 Undo commands in our history 9:10 Starting our command pattern in C++ 10:15 Creating our command class 10:45 Creating our interface member functions 11:25 A simple use case for our command pattern 12:40 Creating a Move, which is a type of Command 13:50 Showing how pure virtual functions must be implemented 15:00 Creating a character 15:45 Passing our character as an argument 17:02 Preparing our character to move 18:25 Adding some output to see what is going on 20:00 Our characters first command 20:40 Storing multiple commands in a queue 23:00 Managing lifetime of our commands with pointers 24:40 Undoing our commands 25:30 How do we know it is working? 26:00 Storing position data for our character in move 29:35 Verifying our execute and undo work 31:30 Using a different data structure to perform undo 32:12 Final code walk through 34:10 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