(resend, wrong from: mail) Am 2012-04-28 um 01:01 schrieb Tobias Pape:

Am 2012-04-28 um 00:45 schrieb H. Hirzel:

...

Hello

Is there a simpler way of writing

Character class selectors includes: #cr

(= test if Character class has method #cr)

Character canUnderstand: #cr

remember, its messages, => ('a' respondsTo: #first) == (String canUnderstand: #first)

Unless, of course, you really wanted to know whether

Character class

knows about #cr. But bear in mind, Character class is not the “class side” of Character but the Metaclass of Character

Character class isKindOf: Metaclass "=> true"

The “class side” of Character is simply Character

Character isKindOf: Class "=> true"

The “instance side” of Character is, you know it, a character itself

$a isKindOf: Character "=> true"

==

So, if you want to know whether the “class side” of Character knows of the method #cr, the correct one is:

Character respondsTo: #cr

HTH

Best -Tobias

Thank you Tobias and Herbert for the answers

Interestingly

Squeak 4.3 -------------- ('a' respondsTo: #first) == (String canUnderstand: #first) evaluates to true

(Character respondsTo: #cr) == (Character canUnderstand: #cr) evaluates to false

Pharo 1.4 ----------- the same as Squeak

Cuis 4.0 --------- true in both cases.

--Hannes

On 4/28/12, Herbert König herbertkoenig@gmx.net wrote:

Hi Hannes,

HH> Is there a simpler way of writing

HH> Character class selectors includes: #cr

Character respondsTo: #cr

Cheers,

Herbert

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