All 40 Design Patterns FAQ

codeproject.com — This article has all design patterns abstract factory pattern ,builder pattern, prototype pattern , shallow copy and deep copy in prototype patterns , singleton pattern , command patterns , Interpreter pattern, iterator pattern , mediator pattern , memento pattern , observer pattern , state pattern , strategy pattern , visitor pattern , difference between visitor and strategy pattern , adapter pattern ,fly weight pattern , bridge pattern , composite pattern , decorator pattern , Façade pattern , chain of responsibility ( COR) , proxy pattern and template pattern, read more...

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You Should Never Use IN In SQL To JOIN With Another Table

sqlservercode.blogspot.com — Do you use the following syntax? SELECT * FROM TABLE WHERE CoLumn IN (SELECT CoLumn FROM TABLE) Do NOT use that it can cause big problems if you do not understand exactly how IN and NOT IN works read more...

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