+1 from me on 'lookup' and '!?'. Personally, I found the '!?' name intuitive immediately when I first saw it in Vector, so I'm a fan of it. Not as sure about 'lookup' because what it does on lists and maps is different from indexing (ie it works with key-value pairs), but it does scan significantly better than 'indexMay'.

On Tue, May 31, 2016 at 1:38 AM, wren romano <winterkoninkje@gmail.com> wrote:

On Sun, May 29, 2016 at 6:12 PM, Ivan Lazar Miljenovic
<ivan.miljenovic@gmail.com> wrote:
> On 30 May 2016 at 07:21, David Feuer <david.feuer@gmail.com> wrote:
>> Data.Sequence offers
>>
>> index :: Seq a -> Int -> a
>>
>> which throws an error if the index is out of range. I'd like to add
>> something like
>>
>> indexMay :: Seq a -> Int -> Maybe a
>
> +1
>
> (I personally don't like the "May" prefix used for functions like this
> as I don't find it very readable, but not enough to argue over the
> colour of the bikeshed ;-)

I too am +1 for the total function, but -1 for the "May" naming scheme.

I'd go with "lookup", since that's what (Int)Map does.

I'd also be fine with Vector's (!?) if folks really want a symbolic
name. (IME this function tends to work better with an alphabetic name,
ymmv)

--
Live well,
~wren

_______________________________________________
Libraries mailing list
Libraries@haskell.org
http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries