Obtaining a slice of unique values from an array

[Dan Fish]

What is the most efficient (or at least AN efficient :-) way of obtaining a
slice from an array wherein the slice contains only unique values found in
the array?

I.E.
if @array = (1,3,5,5,3,5,2,1)  then @slice = (1,3,5,2)

Thanks,
-Dan



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