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One example is, the typical string item in Goal-C is NSString and it's got a mutable subclass NSMutableString. Whenever you use a category to extend the NSString course, every single NSString and NSMutableString item inside your code will guidance these new strategies. The ideal designers

By way of example, the typical string item in Goal-C is NSString and it's a mutable subclass NSMutableString. When you make use of a class to increase the NSString course, each individual NSString and NSMutableString object in your code will support these new solutions. Apply new capabili