NSDecimalNumber overflow when trying adding value

Question

I have to add decimal values after converting them from NSString, but it fails for null values, even if I do the test.

[lastPrice decimalNumberByAdding:actualPrice==nil?nullValue:actualPrice]] 

In debug mode :

lastPrice = 0;
actualPrice = NaN
nullValue = 0;

I expected that

actualPrice==nil?nullValue:actualPrice

would be estimated correctly but nil is not NaN...

How can I do this ?

Answer 1

Ok ! The solution is here

The test should be :

[lastPrice decimalNumberByAdding:isnan([actualPrice doubleValue]?nullValue:actualPrice]]