Question

I have a list of elements in Erlang, and I’m using lists:foreach to traverse through the elements in the list. Is there a way to break out of this “foreach loop” in the middle of the traversal. For eg: suppose I want to stop traversing the list further if I encounter a ‘1’ in the list [2, 4, 5, 1, 2, 5]. How do I do this?

Answer 1

traverse(Liste) ->
 traverse(Liste, []).

traverse([], Acc) ->
 Acc;    

traverse([1|_], Acc) ->
 Acc;

traverse([H|T], Acc) ->
 % do something useful here maybe?
 traverse(T, Acc).

Of course this is very rough example.