[Haskell-cafe] groupBy without Ord?

[Kim-Ee Yeoh]

On Sun, Mar 23, 2014 at 1:29 AM, martin <martin.drautzburg at web.de> wrote:

> So I often wonder, where you
> would use Haskell's groupBy WITHOUT sorting first, but I assume there are
> situations, where this is useful.
>

But if you sorted first, then there must be an Ord-er on the elements, yes?
In which case you could then apply (sqlGroup = group . sort) as originally
desired.

I'm sure groupBy is useful standalone (dim memories of some functional
pearl) but your hunch is right in that I normally use it after a sorting
step.

-- Kim-Ee
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