Math.Round toffee vs darwin

Elements Elements RTL
1

Hi,
With this code

      var x := 1234.877;
      Log($'{Math.Round(x,0)}');

On darwin macos I get

1235

On toffee macos I get

1235.000000

Round.zip (1.9 MB)
Cheers,
John

2

That seems to be less an issue with Round than with how the interpolated string formats the number?

3

Yes. Is there documentation for the string format specifier used in RTL2 ?

4

I don’t believe so; I should add that. That said, tis isn’t RTL2’s String.Format, this is compiler-level string interpolations and — I believe— it essentially does a ToString on each item, which mans it will use the platforms default string representation for the type, in this case Double.

For consistent formatting, I suggest to use RTL2’s String.Format (which I believe we did add advanced summer formatting to) and/or Convert.ToString(double).

7

The Toffee version of ToString

Doesn’t appear to use locale ?

      var x := 1234.877;
      
      var currentLocale := Locale.Current;
      
      currentLocale.NumberFormat.ThousandsSeparator := '-';
      
      Log($'{Convert.ToString(x,0,0,currentLocale)}');

Returns 1,235

8

Also this doesnt appear to work

      Locale.Current.NumberFormat.ThousandsSeparator := '-';
      
      Log($'{Convert.ToString(x,0)}');

It also gives 1,235

How would I get 1235 ?

Locale.Invariant seems to do the trick but Im not sure if that intended.

9

I don’t think you’re supposed to modify Locales. I’ll have to have a look at this API and see why this is even writable…

10

Fixed. :wink:

11

Hmm, indeed, it uses one for nil (current) and Invariant, but not if one is passed. Fixed.

12

Thanks.

If I did want to make use of NumberFormat.ThousandSeparator, doesnt SetupNumberFormatter

need to be expanded ?

For example to get * instead of , this seems to work

      var x := 13234.877;

      var formatter := new NSNumberFormatter;
      formatter.minimumFractionDigits := 1;
      formatter.maximumFractionDigits := 1;

      //formatter.formatterBehavior := NSNumberFormatterBehavior.NSNumberFormatterBehaviorDefault;
      //formatter.usesGroupingSeparator := true;
      //formatter.groupingSeparator := '*';

      formatter.formatterBehavior :=  NSNumberFormatterBehavior.Behavior10_0;
      formatter.hasThousandSeparators := true;
      formatter.thousandSeparator := '*';
      
      var myString := formatter.stringFromNumber(x);

      LOG($'{myString}');