Re: 57-my-last-mying-changes.patch

[Derek R. Price]

Tom Tromey wrote:

> >>>>> "Akim" == Akim Demaille <address@hidden> writes:
>
> Akim> Six, six for them! (I'm not counting those for file handles,
> Akim> which perl refuses as my, not sure to understand why).
>
> The way file handles work is another reason to dislike Perl.  At
> least, I've always found them confusing.

The Perl5 file handles are different.  This example is for reading a file.
Really, the arguments to "new" are the same arguments open accepted.:


     require 5.004;
     use IO::File;

     my $fh = new IO::File "< filetoread";
     while ($fh->getline)
     {
         dostuff $_;
     }

The other functions available for old style file handles are similar.  These
are just front ends for the old Perl builtins, but context switching just
happens automatically now.  e.g. $fh->eof, $fh->print, $fh->open (usually
called implicitly with arguments to new), $fh->close (unnecessary - "undef
$fh" will autoclose), $fh->autoflush, $fh->fileno, etc.

"$fh->getlines;" will work like calling <$fh> in an array context.

"my $line = $fh->getline;" & "my @lines = $fh->getlines;" (to read an entire
file) are valid constructs.  I don't remember if the same was true of <>, but
I think so.

P.S.  You probably won't need to know, but Perl5 prior to 5.004 used
FileHandle in lieu of IO::File, and FileHandle is still supported as a front
end for IO::File, but is deprecated.

Derek

--
Derek Price                      CVS Solutions Architect ( http://CVSHome.org )
mailto:address@hidden     OpenAvenue ( http://OpenAvenue.com )
--
As honest as the day is long.

                - S. Z. Sakall as Headwaiter Carl, _Casablanca_