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#Objective-C #objc #object-oriented programming #poo #square brackets #message passing #c superset

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#Objective-C #objc #c language #message passing #at sign #square brackets #obj-c syntax

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#message passing #inter-node communication #coordination #distributed algorithms #remote procedure call #rpc

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#Objective-C #objc #apple development #ios dev #macos dev #xcode #message passing