[erlang-questions] Padding a binary to a multiple of 4 bytes

Matthew Dempsky <>
Sun Dec 21 04:24:34 CET 2008


2008/12/20 Camille Troillard <>:
> I don't find it very elegant, and guess there is a better way of doing this.

Your solution looks fine to me.

> Also, I was wondering why the "/binary" suffix was needed if I want to
> append to the Bin variable.  Intuitively, I have written <<Bin, 0:size>>,
> but it doesn't work.

If you omit a type specifier on a variable in a binary expression, it
defaults to a single byte.  The expression is statically typed at
compile time, so if you write <<Bin>>, the compiler writes code that
assumes Bin is an integer value.  At run-time, when it detects it's a
binary instead, a type error is raised.



More information about the erlang-questions mailing list