Re: Reading X lines at a time

[Georg Moritz]

From the keyboard of Rick Delaney [03.05.04,09:23]:

> On Mon, May 03, 2004 at 02:07:42PM +0200, Georg Moritz wrote:
> > Hello Jose,
> >
> > > @_=map{scalar(<>)}(1..$X)
> >
> > inside a loop testing for eof is necessary:
> >
> > while(!eof()&&(@_=map{scalar(<>)}(1..$X)){
> >     &foo; # gets @_
> > }
>
> The eof() must be inside the map or things will be messed up when you
> don't have an exact multiple of $X lines.

you have some undefs in the resulting array.

>     while (my @a = map { eof() ? () : scalar <> } 1 .. $n) {
>         print @a;
>         print "SEPARATOR\n";
>     }

but this will loop forever, since the array @a is always defined, even
on eof(). map() will return a bunch of undefs.

greets,
georg

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