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  • Les processeurs de la série Sparc T4 seront commercialisés dans moins d'un an, Oracle introduit la notion de threading intelligent

    Les processeurs de la série Sparc T4 seront commercialisés dans moins d'une année Oracle introduit la notion de « threading intelligent » La série T4, la prochaine génération des processeurs Sparc T verra le jour "dans moins d'une année" d'après Rick Hetherington, le vice-président du développement Hardware de Oracle. Pas moins de 1000 ingénieurs travaillent sur ce projet d'après les déclarations de Hetherington qui a dévoilé la feuille de route d'Oracle pour ses prochains processeurs lors d'une séance de questions-réponses avec le département des relations publiques de l'entreprise. On y apprend que le coeur de la série T4, en développement depuis 2006 &q...

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  • FlyWeight

    You are developing some gaming software. Your write Web client and on each of response you are parsing entire XML to get your game Units. You have some set of types of Units, for example 50 different animals, but when you parse your XML you can get dozens of instances. Memory issue? - FLYWEIGHT will

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  • Singleton

    Imagine that you need some global logging system in your application.You need to be able log your messages to some file at any point of your application, but also you need to numerate your messages.How can you accomplish this? - SINGLETON

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  • NullTransport for WCF

    This article describes design, implementation and the usage of the custom in-process transport for Microsoft Windows Communication Foundation (WCF) model.

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  • "Collection Wrapper" pattern - is this common?

    - by Prog
    A different question of mine had to do with encapsulating member data structures inside classes. In order to understand this question better please read that question and look at the approach discussed. One of the guys who answered that question said that the approach is good, but if I understood him correctly - he said that there should be a class existing just for the purpose of wrapping the collection, instead of an ordinary class offering a number of public methods just to access the member collection. For example, instead of this: class SomeClass{ // downright exposing the concrete collection. Things[] someCollection; // other stuff omitted Thing[] getCollection(){return someCollection;} } Or this: class SomeClass{ // encapsulating the collection, but inflating the class' public interface. Thing[] someCollection; // class functionality omitted. public Thing getThing(int index){ return someCollection[index]; } public int getSize(){ return someCollection.length; } public void setThing(int index, Thing thing){ someCollection[index] = thing; } public void removeThing(int index){ someCollection[index] = null; } } We'll have this: // encapsulating the collection - in a different class, dedicated to this. class SomeClass{ CollectionWrapper someCollection; CollectionWrapper getCollection(){return someCollection;} } class CollectionWrapper{ Thing[] someCollection; public Thing getThing(int index){ return someCollection[index]; } public int getSize(){ return someCollection.length; } public void setThing(int index, Thing thing){ someCollection[index] = thing; } public void removeThing(int index){ someCollection[index] = null; } } This way, the inner data structure in SomeClass can change without affecting client code, and without forcing SomeClass to offer a lot of public methods just to access the inner collection. CollectionWrapper does this instead. E.g. if the collection changes from an array to a List, the internal implementation of CollectionWrapper changes, but client code stays the same. Also, the CollectionWrapper can hide certain things from the client code - from example, it can disallow mutation to the collection by not having the methods setThing and removeThing. This approach to decoupling client code from the concrete data structure seems IMHO pretty good. Is this approach common? What are it's downfalls? Is this used in practice?

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  • Google Drive SDK: ?? ???? SDK? ?? ????

    Google Drive SDK: 구글 드라이브 SDK로 개발 시작하기 이번 구글 개발자 라이브에서는 실제로 코드를 만져보며 구글 드라이브 SDK의 사용법과 안드로이드 어플리케이션과의 연동 방법에 대해 알아보았습니다. 다른 언어, 개발 환경에서의 구글 드라이브 연동 방법 및 관련 코드 또한 개발자 문서에 자세히 적혀있으니 참조해주시기 바랍니다. 개발자... From: GoogleDevelopers Views: 968 27 ratings Time: 27:18 More in Science & Technology

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