Proposal for containers: Add 'pop' function to Data.Map

[David Feuer]

None of these types are comonads, so it doesn't seem *that* confusing.

On Sun, Dec 6, 2020, 12:59 PM Bob Ippolito <bob at redivi.com> wrote:

> `extract` overlaps with the Comonad typeclass (extract, duplicate, extend)
>
> On Sun, Dec 6, 2020 at 9:34 AM Tom Ellis <
> tom-lists-haskell-cafe-2017 at jaguarpaw.co.uk> wrote:
>
>> I really like `extract`!
>>
>> On Sun, Dec 06, 2020 at 05:29:40PM +0000, Alexey Kuleshevich wrote:
>> > `extract` is the name that I would suggest. I also agree with David
>> > that `pop` is a bit too confusing in a non-stack/queue data
>> > structure. If all languages named it pop, then it would be good
>> > argument for the name, but we don't need to copy python. The only
>> > thing that pyhon has that I wish we had in Haskell is the popularity
>> > ;)
>> >
>> > ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
>> > On Sunday, December 6, 2020 8:16 PM, Carter Schonwald <
>> carter.schonwald at gmail.com> wrote:
>> >
>> > > LookupThenRemove seems like a more descriptive name. Though I guess I
>> can see why pop has appeal.
>> > >
>> > > On Sun, Dec 6, 2020 at 11:44 AM David Feuer <david.feuer at gmail.com>
>> wrote:
>> > >
>> > >> I suggest you add a version for Data.Sequence combining lookup with
>> deleteAt. I wanted that for something fairly recently.
>> > >>
>> > >> On Sun, Dec 6, 2020, 11:41 AM Martijn Bastiaan via Libraries <
>> libraries at haskell.org> wrote:
>> > >>
>> > >>> Yeah, Python's `pop` made me call it `pop`. I had hoped to find
>> other
>> > >>> examples, but Java, Rust, and Ruby don't seem to offer `pop`-like
>> > >>> functions for their (hash)maps.
>> > >>>
>> > >>> On 12/6/20 5:29 PM, Tom Ellis wrote:
>> > >>>> On Sun, Dec 06, 2020 at 11:25:33AM -0500, David Feuer wrote:
>> > >>>>> The name pop makes me think of a stack. Is this use of the word
>> common?
>> > >>>> Python uses that name, which is why I'm familiar with it:
>> > >>>>
>> > >>>>>>> d = {'a': 1, 'b': 2}
>> > >>>>>>> d.pop('b')
>> > >>>> 2
>> > >>>>>>> d
>> > >>>> {'a': 1}
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