[erlang-questions] Formatting question
Sat Aug 4 21:06:23 CEST 2007
I've two question about string handling
I'd like to convert binary data to its hex string representation.
E.g. bin2hex(<<255:16>>) -> "00FF"
The (buggy) solution I've come with so far is
lists:foldr(fun (Byte, R) -> [hd(io_lib:fwrite("~.16B", [Byte]))|R]
end, , binary_to_list(X))e.
First thing to note is, that it does not do the things it should :-(
Reason is that io_lib:fwrite does not insert a leading zero if Byte is
less than F.
Question no. 1: how do I specify pad characters with ~B formatting option ?
Question no. 2: the solution somehow looks ugly. That cannot be right.
Does anyone have a more succinct solution for bin2hex ?
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