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1. Add Mouse (0) to the list 2. Add Monitor (1) to the list 3. Create a peripheral (ph, 10), which group Mouse and Monitor together, and add to the list. 4. Add CPU (2) to the list

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To-do list: In this case, I am planing to put an image onto a RectROI object. The pixel size of the scenery image is not necessarily equal to that of a RectROI object. Instead the image size is variable and capable of adaptive to any size you set .

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Today I reveiewed Observer Pattern – Design Pattern (Using C#) and have finished watching Observer Design Pattern tutorial.
As usual, I implemented the example in C# instead of JAVA.

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What is the Visitor Design Pattern ? 1. Allows you to add methods to classes of different types without much altering to these classes. 2. You can make completely different methods depending on the class used.

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What is flyweight pattern? 1. Used when you need to create a large number  of similar objects 2. To reduce memory usage you share objects that are similar in some way rather than creating new ones Now we are going to create a lot of rectangles with specific Intrinsic State: Color <---- which all of the rectangle objects are going to share in order to get the

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Create a logger Pass a message with level = debug and log it Pass a message with level = info and log it Pass a message with level = error and log it Here debug < info < error … level wis

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  Today I am going to show you another way to implement the example demonstrated in the last episode about command pattern. Here is the UML diagram for command pattern and it will be implemented as usual in C#. This time Command block is about to become an abstract class, and LightOnCommand is one of its concrete commands.

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 1: interface IWeapon

 2: {

 3: void Use();

 4: }

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  GateState interface:

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A. Iterator:

 1: interface Iterator

 2: {

 3: object First();

 4: object Next();

 5: bool IsDone();

 6: object CurrentItem();

 7: }

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