html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/pull/88#issuecomment-39388919,https://api.github.com/repos/pydata/xarray/issues/88,39388919,MDEyOklzc3VlQ29tbWVudDM5Mzg4OTE5,1217238,2014-04-02T21:54:14Z,2014-04-02T21:54:14Z,MEMBER,"The bigger problem with redundant coordinates would be other machinery (e.g., for broadcasting arrays) which assumes that coordinates are unique.

For this function, the second use of the coordinate just wouldn't appear in the representation. My guess is that most functions should degrade relatively gracefully (like this one), because I usually use `array.dimensions.index(dim)` to determine axis numbers, which returns the first index in which `dim` appears.

If we want to support arrays with duplicate dimensions, we should definitely add some test cases.
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https://github.com/pydata/xarray/pull/88#issuecomment-39386922,https://api.github.com/repos/pydata/xarray/issues/88,39386922,MDEyOklzc3VlQ29tbWVudDM5Mzg2OTIy,514053,2014-04-02T21:35:26Z,2014-04-02T21:35:26Z,CONTRIBUTOR,"I like the new look, more intuitive.

One thought, what happens when a variable has a coordinate twice?  For example a covariance matrix?
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