Houssam Fakih wrote:
> Hello,
> 
>  
> 
> I’m trying to concatenate many collections (sets) together. I learn 
> (from beck’s book) that the use of stream is efficient so I try the 
> following code
> 
>  
> 
> write _ WriteStream on: Set new.
> 
> write nextPutAll: (Set with:4 with:5)
> 
> write contents
> 
>  
> 
> but it doesn’t work because Set isn’t a member of a 
> SequenceableCollection then it doesn’t understand the message : 
> replaceFrom:to:with:startingAt:
> 
>  
> 
> Finally I try a code as:
> 
> write _ WriteStream on: {}.
> 
> write nextPutAll: (Set with:4 with:5)
> 
> write contents asSet
> 
>  
> 
> I’m happy with the result but I need just to know if there is another 
> pattern to use Set and Stream.

I'm not entirely sure what you're trying to do, but:

a := Set with: 1 with: 'a' with: #hello.
b := Set with: 2 with: 'b' with: #world.
c := Set new.
c addAll: a.
c addAll: b.

Is that what you want? Remember to look at the Set class and see what it 
can do.

Mikevdg.