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

This hasn’t seen any action for a while, but all of the prior solutions seem overly convoluted. Here’s what, for me, seems much simpler:

[begin if N < 10 -> 48 + N; true -> 87 + N end end || <> <= Bin]

If you prefer it expanded a bit:

[begin
    if
        N < 10 ->
            48 + N; % 48 = $0
        true ->
            87 + N  % 87 = ($a - 10)
    end
end || <> <= Bin]