Hi. I was needing something like the SQL select distinct, that doesn't take into account repeated objects. I didn't found anything useful in Collection, and thus, I have implemented this:

Collection >> collectDistinct: aBlock

collectDistinct: aBlock
�� "Evaluate aBlock with each of the receiver's elements as the argument.�
�� Collect the resulting values into a Set, thus repeated objects will not be present.
�� Answer the new collection."

�� | newSet |
�� newSet := self species new asSet.
�� self do: [:each | newSet add: (aBlock value: each)].
�� ^ newSet

Is there a better way ?�� Do you think it make sense to put this in Pharo ?

Cheers

Mariano