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
309976469,MDExOlB1bGxSZXF1ZXN0MTc4NDk0ODMw,2031,Isin,5635139,closed,0,,,9,2018-03-30T05:07:12Z,2018-04-04T03:52:21Z,2018-04-04T02:46:57Z,MEMBER,,0,pydata/xarray/pulls/2031," - [x] Tests added (for all bug fixes or enhancements)
 - [x] Tests passed (for all non-documentation changes)
 - [x] Fully documented, including `whats-new.rst` for all changes and `api.rst` for new API (remove if this change should not be visible to users, e.g., if it is an internal clean-up, or if this is part of a larger project that will be documented later)

This is an initial implementation of `isin`. It works for DataArrays, but isn't yet implemented further.

I've been away from these sorts features for too long: Is there a canonical place to put these? What's the canonical approach to extending to datasets? I can see a few approaches in the code. ","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/2031/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull