Is there an easy way to fill with zeros in array concatenation?

General Usage
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11

Nobody has suggested

julia> cat(rand(2,2),rand(3,3);dims=(1,2))
5×5 Matrix{Float64}:
 0.104583  0.266817  0.0       0.0       0.0
 0.915434  0.785553  0.0       0.0       0.0
 0.0       0.0       0.89667   0.760755  0.778991
 0.0       0.0       0.18982   0.439059  0.489084
 0.0       0.0       0.937842  0.298687  0.669757
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