[PDF] Réutilisation dans les SI : patrons de conception

What is a design pattern?

design pattern is: a standard solution to a common programming problem a technique for making code more ?exible by making it meet certain criteria a design or implementation structure that achieves a particular purpose a high-level programming idiom shorthand for describing certain aspects of program organization

What are some good design patterns to use?

If your design or implementation has a problem, consider design patterns that address that problem Canonical reference: the "Gang of Four" book Design Patterns: Elements of Reusable ObjectDesign Patterns: Elements of Reusable Object-Oriented Software, by Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides, Addison-Wesley, 1995.

What is prototype pattern?

The prototype pattern provides another way to construct objects of arbitrary types. Rather than passing in a BicycleFactory object, a Bicycle object is passed in. Its clone method is invoked to create new bicycles; we are making copies of the given object.

How do design patterns affect understandability?

Design patterns may increase or decrease the understandability of a design or implementation. They can decrease understandability by adding indirection or increasing the amount of code. They can increase understandability by improving modularity, better separating concerns, and easing description.