On 10 March 2010 15:07, Nicolas Cellier <nicolas.cellier.aka.nice@gmail.com> wrote:
self collect: aBlock as: Set
One more time, i found this very beatiful and useful extension to Collection protocol. And i am proud being a witness when this thing is born! :)
2010/3/10 Mariano Martinez Peck <marianopeck@gmail.com>:
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
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