Hi,
I have some questions about using user-defined MAL functions

I would like to create a function in MAL. 

1) Is it possible that the function can take variable number of BATs as argument like in the case of algebra.joinPath(l:bat[:any,:any]... )  ?
2) If yes, how I can get the number of BATs passed as argument and 

3) how I can get the n-th element of the argument? 

Thank you in advance
Petros