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

[Bob Ippolito]

`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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