issues: 430203605

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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
430203605 MDU6SXNzdWU0MzAyMDM2MDU= 2876 Custom fill value for align, reindex and reindex_like 1217238 closed 0     2 2019-04-07T23:08:17Z 2019-05-05T00:20:55Z 2019-05-05T00:20:55Z MEMBER      

It would be nice to be able to specify a custom fill value other than NaN for alignment/reindexing, e.g., ```

xr.DataArray([0, 0], [('x', [1, 2])]).reindex(x=[0, 1, 2, 3], fill_value=-1) <xarray.DataArray (x: 4)> array([-1, 0, 0, -1]) Coordinates: * x (x) int64 1 2 3 4 ```

This should be pretty straightforward, simplify a matter of adding a fill_value keyword argument to the various interfaces and passing it on to Variable.__getitem_with_mask inside xarray.core.alignment.reindex_variables().

 
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