Not sure why Objective-C decided to use NSNumber instead of float, double, etc. How is this type represented on disk?
Not sure why Objective-C decided to use NSNumber instead of float, double, etc. How
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Not sure why Objective-C decided to use NSNumber instead of float, double, etc. How is this type represented on disk?
NSNumberis toll-free bridged withCFNumber. In recent implementations of Core Foundation,CFNumberis a tagged pointer. This lets it be treated as an object, but without all the overhead of an object. Instead, the value is encoded in the object pointer (and isn’t actually a pointer).See Tagged pointers and fast-pathed CFNumber integers in Lion.