On Tue, 30 Jun 2009 16:39:43 +0200, Igor Stasenko wrote:

> 2009/6/30 Klaus D. Witzel :
...
>>> so, then you could have a method, which by iterating through your
>>> special collection, ignores all objects except those who
>>> also can be iterated in same manner:
>>>
>>> MySpecialCollection>>mySpecialCollect: aBlock
>>>     ^ self collect: [:each |
>>>          each isMySpecialCollection ifTrue: [ each mySpecialCollect:
>>> aBlock] ifFalse: [each]
>>>      ]
>>
>> In _any_ Smalltalk, (each respondsTo: #mySpecialCollect:) is what you  
>> want.
>>
>
> where the guarantees that some completely different class does not
> implements such method with completely different behavior?

Yes, I know, and I know your other requirements from CVLambda as well :)  
the answer is :

1] you want to reflect on every possible class/behavior

2] you don't want to reflect on 1] as well

Shall I write 3] or was this already Okay ;)

/Klaus