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

6 Dec 2020


      NonEmptySeq could be. NonEmptySet almost (it could have extract).

- Oleg

On 6.12.2020 20.02, David Feuer wrote:
...
None of these types are comonads, so it doesn't seem *that* confusing.
On Sun, Dec 6, 2020, 12:59 PM Bob Ippolito mailto:bob@redivi.com> wrote:
`extract` overlaps with the Comonad typeclass (extract, duplicate,
    extend)
On Sun, Dec 6, 2020 at 9:34 AM Tom Ellis
    mailto:tom-lists-haskell-cafe-2017@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
        mailto:carter.schonwald@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
        mailto:david.feuer@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 mailto:libraries@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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Re: Proposal for containers: Add 'pop' function to Data.Map

Oleg Grenrus