[erlang-questions] List matching, help me make this look better

Steve Vinoski vinoski@REDACTED
Sat Apr 25 20:01:16 CEST 2009

On 4/25/09, Kevin <q2h46uw02@REDACTED> wrote:
>  As an example I want to read a file, line by line, and pass the line
>  into a function, and it want it to match
>  on the first 4 characters.  In the example I'm matching on "aaaa",
>  "bbbb", "cccc".

See Kostis's reply for the answer, but I just wanted to comment on the

>  I also tried converting everything to binaries but that traded ugly for
>  ugly.

Not sure why you'd call the binary approach ugly -- just rewriting
your example a bit yields:

myfunc(<<"aaaa", _/binary>>) ->
   io:format("matched aaaa~n");

myfunc(<<"bbbb", _/binary>>) ->
   io:format("matched bbbb~n");

myfunc(<<"cccc", _/binary>>) ->
   io:format("matched cccc~n");

myfunc(_) ->
   io:format("no matches~n").


More information about the erlang-questions mailing list