Re: NSString floatValue issue

FROM : C Sandeep
DATE : Tue Feb 26 21:47:30 2008

Hi all,

Thanks for the ideas. Im using the class method to evaluate such
strings, thusly:

-(NSNumber *) getNumberFrom: (NSString *) str {

    NSScanner *scanner = [NSScanner scannerWithString: str];
    int numerator, denominator;
    [scanner scanInt: &numerator];
    [scanner scanString:@"/" intoString: NULL];
    [scanner scanInt: &denominator];
    float result = (float) numerator/denominator;
    NSNumber *nm = [NSNumber numberWithFloat: result];

    return nm;
}

- Sandeep

On Tue, Feb 26, 2008 at 1:27 PM, Hamish Allan <<email_removed>> wrote:
> On Tue, Feb 26, 2008 at 6:12 PM, Jean-Daniel Dupas
>  <<email_removed>> wrote:
>
>  > As far as I know, there is no Math expression parser buit-in Cocoa.
>  >  You will have to write your own evaluator to do this.
>
>  Or use e.g. NSTask with 'bc' (remembering to specify a scale for bc).
>
>  Hamish
>