What is the Command Pattern? The definition of the Command Pattern from both Design Patterns: Elements of Reusable Object-Oriented Software and Head First Design Patterns: A Brain-Friendly Guide is The Command Pattern encapsulates a request as an object, thereby letting you parameterize other objects with different requests, queue or log requests, and support undoable operations. … [Read more…]
Weighted Random Bracket Generator I am a big fan of the NCAA Men’s Basketball Tournament. I like to fill out online brackets at ESPN.com for fun every year. Well, I noticed there was an option to randomly generate the bracket this year. For each game, each team had a 50/50 chance of winning. This can … [Read more…]
What is the Singleton Pattern? The Singleton Pattern makes sure a class has only one instance and provides a way to access it globally. It’s typically preferred, within the development community, to find alternatives to using global access, if possible. What the Singleton Pattern does better than say, a global variable, is that it’s access … [Read more…]
What is the Abstract Factory Pattern? In a previous post, I described the Factory Method Pattern and provided a C++ code example. In this post I would like to provide information on another factory pattern, the Abstract Factory Pattern. Let’s jump right in and start with the Abstract Factory Pattern’s formal definition from “Head First … [Read more…]