id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
1600382587,PR_kwDOAMm_X85Kyh9V,7561,Introduce Grouper objects internally,2448579,closed,0,,,4,2023-02-27T03:11:36Z,2023-06-14T21:18:26Z,2023-05-04T02:35:57Z,MEMBER,,0,pydata/xarray/pulls/7561,"Builds on the refactoring in #7206 

- [x] xref #6610
- [x] Use TimeResampleGrouper
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1600469223,PR_kwDOAMm_X85Ky0-D,7562,"Support first, last with dask arrays",2448579,closed,0,,,0,2023-02-27T04:54:09Z,2023-03-03T23:13:57Z,2023-03-03T23:13:52Z,MEMBER,,0,pydata/xarray/pulls/7562,"Use dask.array.reduction. For this we need to add support for the `keepdims` kwarg to `nanfirst` and `nanlast`. Even though the final result is always keepdims=False, dask runs the intermediate steps with keepdims=True.

<!-- Feel free to remove check-list items aren't relevant to your change -->

- [ ] Closes #xxxx
- [x] Tests added
- [x] User visible changes (including notable bug fixes) are documented in `whats-new.rst`
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