> From: Sean McBride <email@hidden>
>> unsigned int len = [aString length];
>> if (len <= 2) // can't have trailing zero's with a string length of 2
>> or less
>> return;
>
> What about a string like ".0"? A degenerate example I know. :)
Actually, I have it covered somewhere else--I don't allow zero values.
>
>> if (!(c >= '1' && c <= '9'))
>
> Not all languages use the characters 0 to 9. Happily, there is
> [NSCharacterSet decimalDigitCharacterSet] and NSString's
> stringByTrimmingCharactersInSet, which you can use together to do this
> more nicely.
>
> You can also use the above to check if NSDecimalSeparator has any numbers
> in it, then maybe just don't touch the string at all.
Well, that shows up a BIG hole in my localization knowledge. I had thought
that the '0' decimal-type character set was universal. Oh well.
So if I understand correctly (it works in my testing, but I wanted to make
sure), I should change things to:
if ([[NSCharacterSet decimalDigitCharacterSet] characterIsMember: '0'])
// if not '0' based, don't trim
{
aString = [*fromString
stringByTrimmingCharactersInSet:[NSCharacterSet
characterSetWithCharactersInString:@"0"]]; // strip trailing zero's
// Note: can't strip both 0's and decimal point at the same time because it
// will overstrip--turing 10000.00 into 1, while we want it 10000
aString = [aString stringByTrimmingCharactersInSet:[NSCharacterSet
characterSetWithCharactersInString:(NSString *)[[NSUserDefaults
standardUserDefaults] objectForKey:NSDecimalSeparator]]];
// now strip trailing decimal point
*fromString = aString;
}
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