Here is a quick example of working with the Command Pattern. I made this application related to a box being draggable and scalable, and able to update its color. For each of those commands, we keep a stack in order to do and undo them. download, and preview souce code Drag the box,  use slider [...]

A good practice In this collaborative decoration example: var o:AbstractDecorator = new ObjectOfDecoration(); var a:AbstractDecorator = new Decorator[2] ( o ); a = new Decorator[1]( a ); a = new Decorator[0]( a ); Please allow object of decoration to remain encapsulated. As all other decorators can make modifications that can bring unwanted decoration results… It [...]

Chain decorators The following is a decoration done independently to the object of decoration. decorator[ 2 ] decorates  Object. decorator[ 1 ] decorates  Object. decorator[ 0 ] decorates Object. This is very direct.. All of the decorators do their work and none of them interact between each other. Consider this as if you were to [...]

what is commutative and non-commutative? Wikipedia describes Commutative as follows: In mathematics, commutativity is the ability to change the order of something without changing the end result. It is a fundamental property in most branches of mathematics and many proofs depend on it. So non-commtative represents that the order can bring different results. Why we [...]