On 16 juil. 2014, at 11:12, Max Bareis wrote:
> The misunderstanding her is based in the error message of the ui.
> when you write
> ^ - self width.
> and save, the UI writes this text into the code:
> ^ only numbers may be negated ->- self width.
>
> More helpful would have been something lik
Then the browser had helped you, as you would have found that the "-" is a
method for subtraction only. But it takes more time to look inside this
browser... The reward is that you find gold nuggets here and there; for
example, when I saw that there were a "asRomanLitteral" for the integers, I
was
Am 16.07.2014 um 11:12 schrieb Max Bareis :
> The misunderstanding her is based in the error message of the ui.
> when you write
> ^ - self width.
> and save, the UI writes this text into the code:
> ^ only numbers may be negated ->- self width.
>
> More helpful would have been something like:
The misunderstanding her is based in the error message of the ui.
when you write
^ - self width.
and save, the UI writes this text into the code:
^ only numbers may be negated ->- self width.
More helpful would have been something like: „only literals may be negated with
- use negated instead“.
That's where the Inspector comes in:
To debug, it is good to insert a self width inspect so that the inspector
opens up and reveals what exactly the width is. OK, it is a number; then
open the browser and look at the number's methods; or in the finder, try 2
. -2 in the examples...
Pharo is excel
It definitely is,
thanks for all your answers…
Regards
Max
Am 16.07.2014 um 00:56 schrieb Camille Teruel
:
> I've been overtaken :)
> Isn't that an active mailing list ?
>
> On 16 juil. 2014, at 00:53, Camille Teruel wrote:
>
> Hi Max,
> Pharo doesn't have syntax for prefix oper
I've been overtaken :)
Isn't that an active mailing list ?
On 16 juil. 2014, at 00:53, Camille Teruel 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.
> Howe
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, V
Max,
Am 16.07.2014 um 00:16 schrieb Verkoster Info :
> 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).
>
>
You can only put the minus sign ("-") before a literal number.
Ej -12, - 4.4, -2/3, etc.
But not in front of any other "non number" object (from the parser
point of view):
Ej:
- #() size "only numbers may be negated"
What you want to do can be performed sending the message #negated to
the obje
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 meth
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