[erlang-questions] apply/2

Henrique Ferreiro <>
Fri Jul 27 23:13:02 CEST 2007


Thanks. Next time I'll read the docs more carefully.

O Ven, 27-07-2007 ás 10:16 -0700, Bob Ippolito escribiu:
> apply/2 takes a fun, not the name of the function (an atom)... to use
> apply/2 you'd do this:
> 
> apply(fun erlang:round/1, [2.3]).
> 
> apply/3 takes the name of the module, the name of the function (both
> atoms), and the arguments as demonstrated.
> 
> -bob
> 
> On 7/27/07, David Mercer <> wrote:
> > Fun round is in the erlang module.  This should work:
> >
> > > apply(erlang, round, [2.3]).
> >
> > Cheers,
> >
> > David
> >
> > -----Original Message-----
> > From: 
> > [mailto:] On Behalf Of Henrique Ferreiro
> > Sent: Friday, July 27, 2007 11:42
> > To: 
> > Subject: [erlang-questions] apply/2
> >
> > Hello,
> >
> > I noticed some extrange behaviour that this list surely can explain:
> >
> > 1> round(2.3).
> > 2
> > 2> apply(round, [2.3]).
> >
> > =ERROR REPORT==== 27-Jul-2007::18:40:22 ===
> > Error in process <0.31.0> with exit value:
> > {{badfun,round},[{erl_eval,do_apply,5},{shell,exprs,6},{shell,eval_loop,3}]}
> >
> > ** exited: {{badfun,round},
> >             [{erl_eval,do_apply,5},{shell,exprs,6},{shell,eval_loop,3}]}
> > **
> >
> > Thanks in advance,
> > Henrique Ferreiro
> >
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