[Haskell-cafe] naturally, length :: a -> Int

Zemyla zemyla at gmail.com
Sat Mar 6 02:03:54 UTC 2021

You're looking for Ratio Natural.

On Wed, Mar 3, 2021, 09:20 Olaf Klinke <olf at aatal-apotheke.de> wrote:

> While we're at it: Can there be a Fractional type permitting only
> positive numbers, as the positive real numbers are closed under
> division?
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