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I suggest you to learn and research some Instant Messaging protocol. One of the most popular protocol is XMPP (eXtensible Messaging and Presence Protocol). It has been a standard for Instant Messaging application like Facebook Messenger, Yahoo Messenger, GTalk, etc. The protocol uses XML schema to communicate between client and server that supports ...


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Objective-C dynamically dispatches every method call. Hypothesis: The benchmark uses static typing to let the Swift compiler hoist the compare method lookup out of the sort loop. This requires a narrow type restriction that only allows Complex objects in the array, not subclasses of Complex. (In Objective-C you could hoist the method lookup manually if you ...



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