issue_comments: 704037491

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https://github.com/pydata/xarray/pull/4484#issuecomment-704037491 https://api.github.com/repos/pydata/xarray/issues/4484 704037491 MDEyOklzc3VlQ29tbWVudDcwNDAzNzQ5MQ== 1277781 2020-10-06T05:32:04Z 2020-10-06T05:32:04Z CONTRIBUTOR

Could I ask what the common use cases for this would be? If I understand correctly, running map(x, y, lambda x: x + y) is equivalent to x + y.

The motivating use case was that I wanted to compute the dot-product of two DataSets (=all of their matching variables). But in general any other function which is not as simple as x + y could be used here.

 
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