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Objective-C is a high-level general-purpose, ... in some cases, syscalls), many common performance optimizations cannot be applied to Objective-C methods (for example ...
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Articles with example Objective-C code (11 P) S. Objective-C software (1 C, 3 P) Pages in category "Objective-C" The following 3 pages are in this category, out of 3 ...
In Objective-C, for example, both the generic Object and NSObject (in Cocoa/OpenStep) provide the method isMemberOfClass: which returns true if the argument to the method is an instance of the specified class.
The following is an example in Objective-C, implying either the OpenStep or Foundation Kit framework is used: // Foo class. @interface Foo : NSObject - ( void ) hello ; @end // Sending "hello" to a Foo instance without reflection.
Forward declaration of a class is not sufficient if you need to use the actual class type, for example, if you have a member whose type is that class directly (not a pointer), or if you need to use it as a base class, or if you need to use the methods of the class in a method. In Objective-C, classes and protocols can be forward-declared like this:
Examples include the Intel iAPX 432 and the Linn Smart Rekursiv. In the mid-1980s Objective-C was developed by Brad Cox, who had used Smalltalk at ITT Inc.. Bjarne Stroustrup, who had used Simula for his PhD thesis, created the object-oriented C++. [13] In 1985, Bertrand Meyer also produced the first design of the Eiffel language. Focused on ...
Apple introduced blocks, a form of closure, as a nonstandard extension into C, C++, Objective-C 2.0 and in Mac OS X 10.6 "Snow Leopard" and iOS 4.0. Apple made their implementation available for the GCC and clang compilers. Pointers to block and block literals are marked with ^. Normal local variables are captured by value when the block is ...