[julia-users] Array horizontal concatenation

[Anthony Ashley]

Hello,

I noticed that implied hcat does not work if a space is omitted between the 
arrays to be concatenated. For example:

[[1 2][3 4]]

gives:

ERROR: MethodError: `typed_hcat` has no method matching 
typed_hcat(::Array{Int64,2}, ::Int64, ::Int64)
Closest candidates are:
  typed_hcat(::Type{T}, ::Number...)
  typed_hcat(::Type{T}, ::Any...)

while this works:

[[1 2] [3 4]]

Is this behavior intentional?

Thanks!