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Latests articles in Design Pattern
Using a factory class as an DLL gateway
Tutorial posted August 1st, 2007 by arantoneThis tutorial demonstrates how to create a flexible DLL that hides the actual implementation behind a factory class acting as a gateway between client and the DLL.
When Symbian met Design Patterns (2) -- Proxy Pattern
Tutorial posted April 24th, 2007 by rensijieIf you had seen the show "Growning Pains" you must remember in one episode, Mike got a newspaper delivery job and he didn't want to deliver any of the newspapers. So he "outsourced" those newspapers to his brother Ben. And the postoffice gave Mike about 5 bucks but Mike only gave Ben 2.5 bucks for remuneration, so he could get 2.5 bucks without doing anything. In postoffice's perspective, they gave Mike 5 bucks and 100 newspapers and no matter how Mike delivered those newspapers, as long as newspapers are sent on time, they will pay for Mike next time anyway(actually he messed it up in the end...). That is, the way Mike deliver newspaper is transparent to the postoffice. Mike could do it himself or let Ben to do this, or maybe Ben will also "outsource" his job to others, whatever.
When Symbian met Design Patterns (1) -- State Pattern
Tutorial posted April 24th, 2007 by rensijieAlmost every software has state machines, It's one of those basic elements of the program. Different states of an object corresponding to different behaviors of it. The simplest state machine is likely the combination of if/else statements or switch/case statements within one class. It works! Absolutely! But what if we have 10 "if" and 10 "else"? Let's see what could the State Pattern do for us?
