erlang:make_tuple(Arity, Default, InitList) -> tuple() R13B で追加 BIF > erlang:make_tuple(4, aa, [{2,bb}, {4, cc}]). {aa,bb,aa,cc} > erlang:make_tuple(4, aa, [{2,bb}, {4, cc}, {2, dd}]). {aa,dd,aa,cc} atom_to_binary(Atom, Encoding) -> binary() R13A で追加 binary_to_existing_atom(Binary, Encoding) -> atom() も追加されました BIF > erlang:atom_to_binary('Erlang', utf8). <<"Erlang">> > erlang:atom_to_binary('Erlan