gistfile1.txt

lists:map(fun(X) -> erlang:display(X) end, ["hello"]).
lists:map(erlang:display, ["hello"]).
%Wrong, you can not refer to erlang:display that way. Would you be pointing to erlang:display/1 or erlang:display/2 ??
lists:map(erlang:display/1, ["hello"]).
%Illegal expression, erlang:display/1 is more like splitting an atom in 1 then it is referring to a function
lists:map(fun erlang:display/1, ["hello"]).
%Yes, this will work. I'm now referring to the function display/1 in the erlang module... few.
[erlang:display(X) || X <- ["hello"]].
%Also works, list expressions.