I have a couple of questions concerning how to use NSDecimal (or even
if that's the correct way to go):
(1)
I'd like to convert decimal strings to unsigned longs; I'm not sure the
best Cocoa way. I know that scanFloat, scanDouble doesn't work, because
of conversion errors (i.e., "1.55"-->1.54999). In my case, its very
important to convert the string accurately, as I'd be converting
something like 1.555m --> 1555mm.
It looks like NSDecimal (scanDecimal) is the way to go, but I'm not
sure the best way to use it. I know I can use
NSDecimalMultiplyByPowerOf10 to convert the NSDecimal returned from
scanDecimal. What's the best way to convert an NSDecimal to an
unsigned long? I wasn't sure if I needed to create an NSDecimalNumber,
then do a [num double] to do a forced conversion.
(2)
Also, what's the best way to determine whether a number is a whole
number? (i.e. the fractional portion is 0-->1.0). I've usually done
something along the lines of
if (x != (float)((int)x))
where x is a float or double; is there an easier way to do this using
an NSDecimal number?
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