(on behalf of Michael Kassler)
there is a function called Unique (alt c) (upside down u) in the
APL2 spec. refer Gilman &Rose 3rd edition page 130.
It appears similar to Iverson's Nub Sieve.
What are the plans to provide this in APL+Win?
Haven't you got the symbol upside-down? I think it should be "cup" (alt-V).
Unique is a pretty easy utility function to write, with two common algorithms depending on whether speed or original order is important to you. Most everyone has at least one of them in their toolbox already.
However, at the last APL2000 conference, a request was made to add dyadic versions of those two symbols ("cap" and "cup") to perform intersection and union (respectively). I don't know if those are actively being considered for inclusion, but if so I would like to hope that Unique gets added at the same time.