Support resize array whose shape has a dim = 0

[martaiborra]

For the moment, a resize of an array with original dimension = 0 (e.g. with original shape {3, 0, 5}) won't be supported to avoid dividing by 0 when updating the shapes. Zarr has the same behavior (see example below).
In a future, we should somehow support it.

import zarr

z = zarr.zeros(shape=(10000, 0), chunks=(1000, 0))
z.resize(20000, 0)  # ZeroDivisionError
z.resize(20000, 10) # ZeroDivisionError

[FrancescAlted]

But this is because a chunk shape cannot be zero. This works:

In [1]: import zarr

In [2]: z = zarr.zeros(shape=(10000, 0), chunks=(1000, 100))

In [3]: z.resize(20000, 10)

In [4]: z
Out[4]: <zarr.core.Array (20000, 10) float64>

[FrancescAlted]

Is that working or not yet?

[martaiborra]

not yet, if some dimension of the shape = 0, then the chunk size is -1.