How can I determine if a Cocoa NSNumber represents NaN (not a number)?
This emerges, for example, when I parse a string that has an invalid (non-numeric) contents.
How can I determine if a Cocoa NSNumber represents NaN ( not a number
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How can I determine if a Cocoa NSNumber represents NaN (not a number)?
This emerges, for example, when I parse a string that has an invalid (non-numeric) contents.
So, I found out that the class property
[NSDecimalNumber notANumber]is just for this purpose. In some languages NaN != NaN, but this isn’t the case in Cocoa.