(And Joel, I have presorted the array prior
to removing the dupes so I have already taken care of the ordering
issue.)
That’s well and good, but in the process of using a hash to remove the
duplicates, the result will be out of order. See example below.
True, but in my case the order only matters for picking the first of
the duplicates. I understand hashes in 1.8 don’t maintain order, but
that isn’t relevant since I don’t care about output order.
I suppose I could have written a longer explanation of what I needed,
but I favored brevity over those other details.
Facets has enumerable#uniq_by implemented like this:
def uniq_by #:yield:
h = {}; inject([]) {|a,x| h[yield(x)] ||= a << x}
end
Ooh, I like this one too. I’ll try it out and see what kind of
performance I get. I understand that #inject performance is weak in
MRI 1.8, but I primarily use JRuby where it doesn’t share the same
performance issues as the C version.
