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
484240082,MDU6SXNzdWU0ODQyNDAwODI=,3245,sparse and other duck array issues,2448579,closed,0,,,33,2019-08-22T22:10:29Z,2021-07-21T21:42:48Z,2021-07-21T21:42:48Z,MEMBER,,,,"Issues I've run into working with @friedrichknuth at the Pangeo meeting trying to use sparse

1. `.plot()` doesn't work. We need to convert to dense before plotting
2. `.values` doesn't work. Raises an error about explicitly calling `todense()`
3. `align` doesn't seem to work.","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3245/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed,13221727,issue
484063701,MDExOlB1bGxSZXF1ZXN0MzEwMDE4Mjk1,3239,Refactor concat to use merge for non-concatenated variables,2448579,closed,0,,,4,2019-08-22T15:29:57Z,2019-09-16T14:49:32Z,2019-09-16T14:49:28Z,MEMBER,,0,pydata/xarray/pulls/3239,"This PR adds two changes:

1. First, it refactors `concat` so that non-concatenated variables are passed to merge. `concat` gains a `compat` kwarg which tells merge how to merge things. `concat`'s previous behaviour was effectively `compat='equals'` which is now the default. 
2. Also adds `compat=""override""` to skip equality checking in merge. concat's `data_vars='minimal'` and `coords='minimal'` options are now more useful because you can specify `compat='override'` to skip equality checking and just pick the first one. Previously this would raise an error if any of the variables differed by floating point noise.

 - [x] xref #2064, closes #1823 
 - [x] Tests added
 - [x] Passes `black . && mypy . && flake8`
 - [x] Fully documented, including `whats-new.rst` for all changes and `api.rst` for new API
","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3239/reactions"", ""total_count"": 2, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 1, ""confused"": 0, ""heart"": 1, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull