I am trying to converet some old 2003 code and need to find help or ideally documentation on the older ML/OCaml code in particular the ‘at’ function.
I had to convert loads of map’s to List.map and Array.create to Array.make
Example code :-
let rec filter_children = function |  ->  | (id,data)::rest -> let (i,j) = at "child-" id 0 in if i=0 then (intern (string_after id j),data) :: filter_children rest else filter_children rest
Hope someone can help,