http://www.widged.com/wiki/ 2012-05-19T01:47:27-07:00 http://www.widged.com/wiki/ http://www.widged.com/wiki/lib/images/favicon.ico text/html 2012-04-15T03:05:05-07:00 Marielle Lange http://www.widged.com/wiki/doku.php?id=en:techniques:programming:object-oriented:inheritance:traits:mechanism&rev=1334484305&do=diff traits Explicit composition Derived traits can be built from an unordered list of parent traits, together with new method declarations. (source: FeatherTrait: a modest extension of Featherweight Java, PDF) With traits, the behavior of a class is specified as the composition of traits and some glue methods that are implemented at the level of the class. These glue methods connect the traits together and can serve as accessor for the necessary state. The semantics of such a class is define… text/html 2012-04-15T02:30:29-07:00 Marielle Lange http://www.widged.com/wiki/doku.php?id=en:techniques:programming:object-oriented:inheritance:traits:overview&rev=1334482229&do=diff traits Why traits? Traits are a programming language technology that promote the reuse of methods between unrelated classes. (source: Applying Traits to the Smalltalk Collection Classes, pdf) Traits are intended as fine-grained units of code reuse. In essence, traits are first class collections of methods that can be reused by classes anywhere in the inheritance hierarchy. text/html 2012-04-15T00:43:21-07:00 Marielle Lange http://www.widged.com/wiki/doku.php?id=en:techniques:programming:object-oriented:inheritance:traits&rev=1334475801&do=diff object-oriented, inheritance, traits * Why, What, When * Composition Mechanisms * Implementation * Concerns Traits vs Class A class has contradicting goals * Generator of instances * Must be complete * Must have a unique place in the class hierarchy text/html 2012-03-22T20:02:31-07:00 Marielle Lange http://www.widged.com/wiki/doku.php?id=en:computers:lg:actionscript:actionscript-3:spark:partadded&rev=1332471751&do=diff Why use partAdded rather than HostComponent to call a function? (from MXML) What are the disadvantage and disadvantage. Answer Note. The major project in Flex 4 was one that required no skinning. A research tool for academic clients. Complex functionalities but no design. The default Spark look and feel was just fine. Other projects in Flex 4 were about taking over from other developers, getting the app to work. Skinnable components were mostly simple (pretty buttons), not composite.