Convert VectorOfArray to Array when the size of the last dimension of each Array varies

Hi,

Thanks for the module, very nice. I was wondering if there's a way to convert an object of type VectorOfArray to Array when the size of the last dimension of each Array varies? Please see the MWE below.

v = VectorOfArray([rand(3, 2), rand(3, 2)])
convert(Array, v) # perfect

v = VectorOfArray([rand(3, 2), rand(3, 4)])
convert(Array, v) # want cat(v..., dims = 2)

Thanks in advance for any suggestions.

(If relevant, my need comes from the fact that, in Flux.jl, the last dimension of an Array corresponds to the observation dimension, and I have a variable number of observations in each Array.)

Start by reproducing the MWE with VectorOfArray and inspect the conversion entry point in RecursiveArrayTools.jl. The change is done when arrays with equal last dimensions retain current conversion behavior and arrays with varying last dimensions are concatenated along dims = 2, with tests covering both cases.