Add unique() to Base?

[johnmyleswhite]

I'd really like to have the unique() function be added to Base. Here's @JeffBezanson's one-liner for it:

unique(a) = elements(Set(a...))

[ViralBShah]

Yes, we should have unique() with that one liner to begin with.

[JeffBezanson]

What about giving results in sorted order?

[johnmyleswhite]

That would be even better.

[JeffBezanson]

In that case the one liner will not be sufficient :)

[StefanKarpinski]

unique(a) = sort!(elements(Set(a...)))?

[pao]

Sorted only works if the type is ordered, though; unique is just as useful with types that are merely comparable.

[StefanKarpinski]

That's a really good point. If someone wants it sorted too, they can wrap it in sort!.

[johnmyleswhite]

@pao's right: ditch the sorting.

[johnmyleswhite]

Thanks!