Control.Monad proposal: Add whenJust

[Carter Schonwald]

+1 to this proposal.

On Wednesday, May 15, 2013, Edward Kmett wrote:

> Personally, I'd be all for just moving Foldable (and Traversable) into the
> Prelude and retiring the monomorphic versions of the functions they supply.
> Both abstractions have born the test of time, and its hard to even envision
> Haskell without them at this point.
>
> I'm somewhat leery that we coud get this proposal past the "but it makes
> it harder to introduce people to Haskell" backlash, but I'd wholeheartedly
> support it.
>
> -Edward
>
>
> On Wed, May 15, 2013 at 10:25 AM, Ben Millwood <haskell at benmachine.co.uk<javascript:_e({}, 'cvml', 'haskell at benmachine.co.uk');>
> > wrote:
>
>> On Wed, May 15, 2013 at 08:01:52AM +0300, Roman Cheplyaka wrote:
>>
>>> * Ben Millwood <haskell at benmachine.co.uk <javascript:_e({}, 'cvml',
>>> 'haskell at benmachine.co.uk');>> [2013-05-12 10:11:01+0100]
>>>
>>>> You can mostly minimise harm by only hiding specific things, but
>>>> that's still more effort than I feel like I should have to go to. I
>>>> think if we decide that the Foldable approach is useful enough to go
>>>> in base, we should not make it a second-class citizen.
>>>>
>>>
>>> ... except it is in base already :)
>>>
>>> Roman
>>>
>>
>> Yeah, sorry, to clarify: *since* we think it is important enough to go in
>> base, we should make it easy to use as well.
>>
>>
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>
>
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