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How does facebook, gmail send the real time notification?

I have read some posts about this topic and the answers are comet, reverse ajax, http streaming, server push, etc. 5 Answer...
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Do zombies exist … in .NET?

... He's a really bright guy with an extensive background in both lower-level and higher-level programming, but his experience with lower level programming far exceeds mine. Anyway, He argued that .NET locking should be avoided on critical systems expected to be under heavy-load if at all possible in ...
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Jackson enum Serializing and DeSerializer

I'm using JAVA 1.6 and Jackson 1.9.9 I've got an enum 14 Answers 14 ...
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Why we should not use protected static in java

...able exists at class level, it does not exist separately for each instance and it does not have an independent existence in classes which extend me. Think about what protected means: This variable can be seen by this class, classes in the same package and classes which extend me. The two mea...
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Akka or Reactor [closed]

...g a new project (java-based). I need to build it as a modular, distributed and resilient architecture. 3 Answers ...
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What is the “volatile” keyword used for?

... correct usage. Could you please tell me what it should be used for in C# and in Java? 8 Answers ...
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Why does the arrow (->) operator in C exist?

... I'll interpret your question as two questions: 1) why -> even exists, and 2) why . does not automatically dereference the pointer. Answers to both questions have historical roots. Why does -> even exist? In one of the very first versions of C language (which I will refer as CRM for "C Refe...
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How to bind 'touchstart' and 'click' events but not respond to both?

...t to mousedown... maybe the long delay is the difference between mousedown and mouseup which is how a click is determined. – Mottie Aug 11 '11 at 0:38 7 ...
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Java Embedded Databases Comparison [closed]

...'t decide which one would be more suitable for me. H2 , HSQLDB , Derby and Berkeley DB seem to be good candidates, but I still don't see how they compare to each other. I appreciate your help comparing them and helping me decide which one to use. ...
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Simulate delayed and dropped packets on Linux

I would like to simulate packet delay and loss for UDP and TCP on Linux to measure the performance of an application. Is there a simple way to do this? ...