ok, I've probably picked up this habit in VisualWorks, and patched all my 
Squeak images to do nothing instead of raising an error in #add: if the 
parameter is nil

rado

On Thu, 12 Nov 2009, Levente Uzonyi wrote:

> Hi!
>
> On Thu, 12 Nov 2009, radoslav hodnicak wrote:
>
>> 
>> In all my time I've been programming in Smalltalk (since about 2000), the 
>> idea that Sets simply do not contain nil was a core assumption of using 
>> collection classes for me, not just an implementation detail. I routinely 
>> do "something asSet" to get rid of nils, and this change would break all my 
>> code.
>> 
> I doubt that. I get an Error when I'm evaluating this: #(1 nil 2) asSet
> You should use #(1 nil 2) reject: [ :each | each isNil ] instead.
>
> Cheers,
> Levente
>