[Haskell-cafe] Text: find

[Antoine Latter]

On Sun, Oct 17, 2010 at 3:25 PM, Bryan O'Sullivan <bos at serpentine.com> wrote:
> On Mon, Oct 11, 2010 at 1:12 PM, Malcolm Wallace <malcolm.wallace at me.com>
> wrote:
>>
>>  find        find      find           (Text -> Bool) -> Text -> Maybe Text
>>
>> Proposal: rename Text.findBy to Text.find.
>
> I agree with the change of type, not so much with the naming. That's roughly
> my stance in the other cases, too.
>

What would the definition of a function of the form:

> find :: (Text -> Bool) -> Text -> Maybe Text

look like?

What sort of requirements would be placed on the input predicate?
Maybe I have a failure of imagination, but that sounds like a tricky
thing to get correct for all predicates.

Antoine