[erlang-questions] Binaries

[Hugo Mills]

On Tue, Jun 19, 2018 at 04:32:49PM +0100, Bob Cowdery wrote:
> If I have a number, say 1450000001 and I want to represent that as a
> binary in the form
> 
>  <<16#14,16#50,16#00,16#00,16#01>> what's the best way.
> 
> I'm not sure what list_to_binary(integer_to_list(1450000001)) which
> prints as <<"1450000001">> produces but I guess its 10 bytes not 5.

   This is basically just binary coded decimal, isn't it?

   You should be able to do this with a binary comprehension:

1> << <<(C-$0):4>> || C <- "12345678">>.
<<18,52,86,120>>

   Hugo.

-- 
Hugo Mills             | Great oxymorons of the world, no. 7:
hugo@REDACTED carfax.org.uk | The Simple Truth
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