It's a bit of a stupid question, but I don't really know how to deal with this efficiently.
So, in many application I have some model with parameters, and I want to the able to change the number of parameters, or they order easily. For passing parameters to functions I want to pack them into a vector p, such that I don't have huge function definition, but inside the function's body I'd prefer to have all the parameters given by their name, so I can use them in equations (instead of using p[1], p[2], ...). I can write two functions p = pack(a,b,c) and (a,b,c) = unpack(p) but that's pretty restrictive because if you add or remove a parameters, I have to change all my function calls and definition. If I add another model I also need to write another pack and unpack pairs. Is there an better approach to do this in Julia ? I was thinking maybe doing a macro @unpack p that would spawn all the variables needed, but I'm not sure that's the right way to do it.
