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

Carter Schonwald carter.schonwald at gmail.com
Sun Dec 6 17:16:55 UTC 2020


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}
>> > _______________________________________________
>> > Libraries mailing list
>> > Libraries at haskell.org
>> > http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries
>> _______________________________________________
>> Libraries mailing list
>> Libraries at haskell.org
>> http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries
>>
> _______________________________________________
> Libraries mailing list
> Libraries at haskell.org
> http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.haskell.org/pipermail/libraries/attachments/20201206/690f8009/attachment.html>


More information about the Libraries mailing list