JavaScript: Functional Programming for JavaScript Developers

Builder

In our fictional world we sometimes have some rather complicated classes, which need to be constructed. The classes contain different implementations of an interface depending on how they are constructed. In order to simplify the building of these classes and encapsulate the knowledge about building the class away from the consumers, a builder may be used. Multiple concrete builders reduce the complexity of the constructor in the implementation. When new builders are required, a constructor does not need to be added, a new builder just needs to be plugged in.

Tournaments are an example of a complicated class. Each tournament has a complicated setup involving the events, the attendees, and the prizes. Much of the setup for these tournaments ...