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Postings from March 2002
From: Ahmed Moustafa <amoustafa@pobox.com>
> Jenda Krynicky wrote:
> > Anyway when reading file you don't need any end of line character,
> > the system KNOWs how long is the file at the moment and <FILEHANDLE>
> > will return undef if you've read all there is.
>
> I didn't get what you meant by "<FILEHANDLE> will return undef if
> you've read all there is"; would you explain more, please?
if you open a file and the read it line by line by
$line = <FILEHANDLE>;
then as soon as you have read all lines in the file, the $line will get
set to undefined. That is if you want to read and process all lines in
a file you do this:
open FILEHANDLE, "< $filename"
or die "Cannot open $filename : $!\n";
while (defined ($line = <FILEHANDLE>)) {
do whatever you like with $line
}
# now we've read "all there is" = "all data in the file"
close FILEHANDLE;
The file doesn't have to end with any special character, and most
likely will not.
Jenda
=========== Jenda@Krynicky.cz == http://Jenda.Krynicky.cz ==========
There is a reason for living. There must be. I've seen it somewhere.
It's just that in the mess on my table ... and in my brain
I can't find it.
--- me
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