clamp function in base

[Carter Schonwald]

Thanks for helping make this happen!

Should be merged In later today!

On Sat, Aug 15, 2020 at 2:19 PM Sandy Maguire <sandy at sandymaguire.me> wrote:

> Sounds good. For whatever reason the tupled arguments make me feel better
> about the `high<low` having undefined behavior. I'll make the change on the
> MR.
>
> On Sat, Aug 15, 2020 at 8:22 AM Emily Pillmore <emilypi at cohomolo.gy>
> wrote:
>
>> +1, though, David has good points about unnecessary laziness. I'm fine
>> with the name and the signature
>>
>> ```
>> clamp :: Ord a ⇒ (a,a) → a → a
>> ```
>>
>> (or some variation on the theme).
>>
>>
>> On Fri, Aug 14, 2020 at 5:38 PM, Sandy Maguire <sandy at sandymaguire.me>
>> wrote:
>>
>>> Hi all,
>>>
>>> It seems to me that base is missing the very standard function `clamp ::
>>> Ord a => a -> a -> a -> a`:
>>>
>>> ```haskell
>>> clamp :: Ord a => a -> a -> a -> a
>>> clamp low high = min high .max low
>>> ```
>>>
>>> I propose it be added to Data.Ord. It's useful, generic, and non-trivial
>>> to get
>>>
>>> right (the "big" number goes with "min" -- causes me cognitive
>>>
>>> dissonance every time.)
>>>
>>> Thanks,
>>> Sandy
>>>
>>>
>>>
>>>
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>>
>>
>
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