title: Is it a good idea to use NSDecimalNumber for floating point arithmetics instead of plain double?
body: <p>I wonder what's the point of NSDecimalNumber. It offers some arithmetics methods, but why should I use NSDecimalNumber and not just double or NSNumber? Did apple take care of some floating point arithmetics uglyness there? Would it make life easier when making heavy use of high precision and big floating point maths?</p>