It definitely is, 

thanks for all your answers… 

Regards 

Max 

Am 16.07.2014 um 00:56 schrieb Camille Teruel
<camille.ter...@gmail.com>: 

> I've been overtaken :) 
> Isn't that an active mailing list ? 
> 
> On 16 juil. 2014, at 00:53, Camille Teruel <camille.ter...@gmail.com> wrote: 
> 
> Hi Max, 
> Pharo doesn't have syntax for prefix operator like "-". 
> The parser does accepts a "-" before literal numbers but it's not possible 
> for arbitrary expressions.
> 
> However you have the message #negated . 
> 
> negatedWidth
> ^ self width negated 
> 
> Cheers, 
> Camille 
> 
> On 16 juil. 2014, at 00:16, Verkoster Info <i...@derverkoster.de> wrote: 
> Hi,
> 
> I am using latest Pharo 3.0 + vm.
> 
> I have a method width with
> width
> 
> ^ 115 * self ratio.
> in my understanding it returns a Number.
> 
> When I try to create a method
> negatedWidth
> 
> ^ - (self width).
> 
> the UI tells me that only Numbers may be negated. I am not able to save the 
> method. Am I on a wrong path or should that work and if how can I avoid the 
> UI error message?
> 
> Regards
> 
> Max
 

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