issue_comments: 364625973

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https://github.com/pydata/xarray/pull/1899#issuecomment-364625973 https://api.github.com/repos/pydata/xarray/issues/1899 364625973 MDEyOklzc3VlQ29tbWVudDM2NDYyNTk3Mw== 6815844 2018-02-10T04:47:04Z 2018-02-10T04:47:04Z MEMBER

There are some obvious fail cases, e.g., if they want to pull out indices array[[1, -1], [1, -1]], in which case the entire array needs to be sliced.

If the backend supports the orthogonal indexing (not only the basic indexing), we can do array[[1, -1]][:, [1, -1]], load the 2x2 array, then apply the vectorized indexing [[0, 1], [0, 1]].

But if we want a full diagonal, we need a full slice anyway...

Also, we would want to avoid separating basic/vectorized for backends that support efficient vectorized indexing (scipy and zarr).

OK. Agreed. We may need a flag that can be accessed from the array wrapper.

 
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