Wed Feb 5 12:42:37 CET 2003
> From: "Pierpaolo BERNARDI" <>
> To: <>
> Subject: Unused functions.
> Date: Wed, 5 Feb 2003 04:20:40 +0100
> I have a bunch of functions that are called only via apply.
> The compiler warns that these functions are unused and
> removes them.
there is a suggestion from to not use apply at all.
see his new erlang standard library packages. for those that do not
have them i will quoute from the CONVENTIONS file:
- Don't use apply(Module, Function, Arguments)
unless the Arguments list actually *can* vary
arbitrarily in length. (This is rarely the case.)
Module:Function(Arg1, ... ArgN)
Where Module and/or Function is a variable.
(This is *much* more efficient than 'apply'.)
If Arguments can have one of a limited number of
lengths, then write an explicit switch:
case Arguments of
 -> Module:Function();
[A1] -> Module:Function(A1);
[A1, A2] -> Module:Function(A1,A2)
(This is still more efficient, and also has the
advantage that it catches illegal-length argument
Never use erlang:apply/2. (If you did not know it
existed, then just forget about it again.)
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