On Sun, May 29, 2016 at 06:28:25PM -0400, David Feuer wrote:

I don't like that bikeshed color much either. Go ahead and suggest something else.

safeIndex? totalIndex? Best solution would be to rename index to unsafeIndex and your proposed function to index, but it's obviously not practicable.

I call my list version at: 'at :: (Num i, Ord i) => [a] -> i -> Maybe a'. I also often use "lookup" as a shorthand for "returns Maybe" (and then "get" means throws on Nothing). On Sun, May 29, 2016 at 3:52 PM, David Feuer wrote:

I'm tempted to go with `lookup`, to match Data.IntMap.

On Sun, May 29, 2016 at 6:35 PM, Francesco Ariis wrote:

...

On Sun, May 29, 2016 at 06:28:25PM -0400, David Feuer wrote:

...

I don't like that bikeshed color much either. Go ahead and suggest something else.

safeIndex? totalIndex? Best solution would be to rename index to unsafeIndex and your proposed function to index, but it's obviously not practicable. _______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries

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Oops. Prelude. No I guess it doesn't. On Sun, May 29, 2016 at 9:40 PM, Edward Kmett wrote:

lookup works for me.

-Edward

On Sun, May 29, 2016 at 6:52 PM, David Feuer wrote:

...

I'm tempted to go with `lookup`, to match Data.IntMap.

On Sun, May 29, 2016 at 6:35 PM, Francesco Ariis wrote:

...

On Sun, May 29, 2016 at 06:28:25PM -0400, David Feuer wrote:

...

I don't like that bikeshed color much either. Go ahead and suggest something else.

safeIndex? totalIndex? Best solution would be to rename index to unsafeIndex and your proposed function to index, but it's obviously not practicable. _______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries

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+1 for lookup. On 30.05.2016 04:48, Edward Kmett wrote:

Then again, most of Data.Sequence already clashes with the Prelude.

On Sun, May 29, 2016 at 10:47 PM, Edward Kmett mailto:ekmett@gmail.com> wrote:

Oops. Prelude. No I guess it doesn't.

On Sun, May 29, 2016 at 9:40 PM, Edward Kmett mailto:ekmett@gmail.com> wrote:

lookup works for me.

-Edward

On Sun, May 29, 2016 at 6:52 PM, David Feuer mailto:david.feuer@gmail.com> wrote:

I'm tempted to go with `lookup`, to match Data.IntMap.

On Sun, May 29, 2016 at 6:35 PM, Francesco Ariis mailto:fa-ml@ariis.it> wrote: > On Sun, May 29, 2016 at 06:28:25PM -0400, David Feuer wrote: >> I don't like that bikeshed color much either. Go ahead and suggest >> something else. > > safeIndex? totalIndex? Best solution would be to rename index to > unsafeIndex and your proposed function to index, but it's obviously > not practicable. > _______________________________________________ > Libraries mailing list > Libraries@haskell.org mailto:Libraries@haskell.org > http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries _______________________________________________ Libraries mailing list Libraries@haskell.org mailto:Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries

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-- Andreas Abel <>< Du bist der geliebte Mensch. Department of Computer Science and Engineering Chalmers and Gothenburg University, Sweden andreas.abel@gu.se http://www2.tcs.ifi.lmu.de/~abel/

+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 wrote:

On Sun, May 29, 2016 at 6:12 PM, Ivan Lazar Miljenovic wrote:

...

On 30 May 2016 at 07:21, David Feuer 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

On Sun, May 29, 2016 at 5:42 PM, David Feuer wrote:

How about (!?) like Data.Vector?

That's good too, though I think most operators should also have an alphanumeric version for those who either like qualified imports, or use it rarely enough that it's not worth memorizing another operator. Or are already using the Data.Vector one.