Adaptation of Design Pattern for Humans to Vala.

Just an adaptation from the PHP examples to Vala, no goal on discussing, questioning or improving the indicated code.

A Vala version of that same document is available here.

Numbering

1. Creational
  1. Simple Factory
  2. Factory Method 
  3. Abstract Factory
  4. Builder
  5. Prototype (See notes)
  6. Singleton
2. Structural
  1. Adapter
  2. Bridge
  3. Composite
  4. Decorator
  5. Facade
  6. Flyweight
  7. Proxy
3. Behavioral
  1. Chain of Responsibilty
  2. Command
  3. Iterator (See notes)
  4. Mediator
  5. Memento
  6. Observer
  7. Visitor
  8. Strategy
  9. State
  10. Template Method

Use

Just do

    $ make

To run the programs, do:

    $ ./build/<name of the pattern>

Notes:

Object cloning is a bit controversial and there's no native clone method in GLib.Object class, so, to simplify, a clone method was added to the prototype example. The original PHP Iterator pattern example depends on SPL Iterable, so, in the Vala example I've used LibGee. This was done merely to recreate the PHP examples into runnable Vala code. I avoided dependencies but to simplify I added a libgee dependency to allow the use of HashMaps, ArrayLists and Iterables.

Dependencies:

- Valac
- GLib
- Libgee (0.8)

Tested on Fedora 23, 25, 27, 29 and 35.