Re: Perl Syntax
From: Steve Bertrand (steveb_at_eagle.ca)
Date: 06/30/04
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Date: Wed, 30 Jun 2004 13:04:45 -0400 (EDT) To: "Drew Tomlinson" <drew@mykitchentable.net>
> I'm using perl 5.8.4 on a 4.9 machine. I want to add code a perl script
> to check for value passed from command line. If it is null, I want to
> exit with an error message.
>
> First I tried this and got "Use of uninitialized value in string eq at
> ./test.pl line 20."
>
> if ($ARGV[0] eq "") {
> print "You must include the file name.";
> exit 1;
> }
>
> Next I tried this but get "Use of uninitialized value in length at
> ./test.pl line 20."
>
> if (length ($ARGV[0]) = "0") {
> print "You must include the file name.";
> exit 1;
> }
>
> I've searched the web and all examples that I've found indicate that I'm
> doing things correctly but obviously I'm not. What am I doing wrong?
>
I know this works:
if ($ARGV[0] eq '') {
print "Debug Mode\n";
}
Cheers,
Steve
> Thanks,
>
> Drew
>
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