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Difference between 5.005 and 5.003 builds
Posted on 1998-10-15
I have recently upgraded from using Activestate's Perl for Win32 (based on Perl 5.003_07) to their Active Perl (based on 5.005_02 built for MSWin32-x86-object) and have found that the loops which start with:
while (($nextline=<INPFILE>) && ($nextline ne "EOR\n"))
{
# blah, blah
}
now throw up the warning
Value of <HANDLE> construct can be "0"; test with defined() at...
Is there anything actually wrong with the line (I have yet to have any run-time problem with the line) or is there a way to rewrite which won't throw up a warning.
Thanks
Matt Freake
while (($nextline=<INPFILE>) && ($nextline ne "EOR\n"))
{
# blah, blah
}
now throw up the warning
Value of <HANDLE> construct can be "0"; test with defined() at...
Is there anything actually wrong with the line (I have yet to have any run-time problem with the line) or is there a way to rewrite which won't throw up a warning.
Thanks
Matt Freake
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2 Comments
1.) You're not alone; I've noticed this also, and so have (see 3b,
below) have many others.
2.) Simplest case you'll get the message on:
use strict;
my($line);
open(FIL, "somefilehere");
while($line = <FIL>) {
yada, yada
}
will give the message as described.
3.) Two ways of getting around it:
3a.)
use strict;
my($line);
open(FIL, "somefilehere");
while(<FIL>) {
$line = $_;
yada, yada
}
3b.) Upgrade your perl!!! With the standard version 5.005_02, the
error goes away (I don't use the active state stuff, so I can't tell
you what the case is). Unless you really need the object stuff, it's
probably best not to be using it in production in any case (same for
threads, IMHO)
below) have many others.
2.) Simplest case you'll get the message on:
use strict;
my($line);
open(FIL, "somefilehere");
while($line = <FIL>) {
yada, yada
}
will give the message as described.
3.) Two ways of getting around it:
3a.)
use strict;
my($line);
open(FIL, "somefilehere");
while(<FIL>) {
$line = $_;
yada, yada
}
3b.) Upgrade your perl!!! With the standard version 5.005_02, the
error goes away (I don't use the active state stuff, so I can't tell
you what the case is). Unless you really need the object stuff, it's
probably best not to be using it in production in any case (same for
threads, IMHO)
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