What does distinct-by return in case of a collision?

(keys (group-by...))

(map first (vals (group-by ...)))

(map other-fn (vals (group-by ...)))

You're still better off w/ group-by, and manipulating the resulting
map appropriately.

Sean

On Feb 22, 1:15 pm, Michał Marczyk <michal.marc...@gmail.com> wrote:
> The Haskell approach is to have two functions, nub and nubBy, which
> perform the task of distinct and the task of distinct with a
> user-provided keyfn, respectively. I'd love to see a distinct-by in
> core or contrib. (Mostly for completeness, it's easy enough to
> write...)
>
> As for the extra set argument, I'd rather leave it out. Use a
> composition of distinct-by and filter.
>
> Sincerely,
> Michał

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