Erlang io:formatting a binary to hex

Question

Can I format an Erlang binary so that each byte is written in hex? I.e.,

> io:format(???, [<<255, 16>>]).
<>

Answer 1

Here is another short and fast version which I use:

hexlify(Bin) when is_binary(Bin) ->
    << <<(hex(H)),(hex(L))>> || <> <= Bin >>.

hex(C) when C < 10 -> $0 + C;
hex(C) -> $a + C - 10.