Julia is a very different and interesting language

[RoyiAvital]

For instance I encountered this:

@ExpandingMan

A*x*B

where A<:AbstractMatrix{<:Number}, B<:AbstractMatrix{<:Number}, x<:AbstractSparseMatrix{JuMP.Variable}.

I think it’s me but this frighten me :-).
I understand simple types (Int, Float, Double) and structures (Array, Struct, etc…).
Then I see this…