Can't use an undefined value as a symbol reference

toniax has asked for the wisdom of the Perl Monks concerning the following question:

Replies are listed 'Best First'.
Re: Can't use an undefined value as a symbol reference by planetscape (Chancellor) on Nov 20, 2010 at 20:41 UTC
Well, for starters, fixing the obvious mistakes: `use strict; our $it; my @fils; foreach my $line (@fils) { if ($line =~ /aa bb cc/) { $it = 4; # do something } if ($it == "4") { # more stuff } }` [download] Other than that, I have no clue what you are trying to do. HTH, planetscape	[reply] [d/l]
Re: Can't use an undefined value as a symbol reference by ww (Archbishop) on Nov 20, 2010 at 20:55 UTC
Following in the footsteps of the Right Rev. JavaFan, line 4 won't compile either. Your `@fils` appears out of the blue and the opening `{` doesn't have a matching `}`. Line 5 doesn't create any problems unless (the indenting suggests otherwise, but...) you don't mean to have the `if` clause run thru `# do something` and on until line 12, but who knows whether `do something` is the source of your problem... Maybe line 4 compiles in your actual script, but not here. So how are we supposed to help when you have obfuscated the problem. Please, post a snippet (where snippet <= 20 lines) that actually compiles but still illustrates your difficulty. And, oh yes, please add `use warnings` to your scipt. It may or may not help you here, but it surely will alert you to numerous mistakes as you write more code.	[reply] [d/l] [select]
Re: Can't use an undefined value as a symbol reference by JavaFan (Canon) on Nov 20, 2010 at 20:37 UTC
Your second line doesn't compile. And it really helps if you can be bothered to give use the actual line in which the error occurs. If you think I'll be copying and running your code just so I get to know on which line the error occurs, you're overestimating your luck.	[reply]
Re: Can't use an undefined value as a symbol reference by Anonymous Monk on Nov 20, 2010 at 21:20 UTC
Hi, Off hand if ($it == "4") { does not look right, you might like to lookup eq and ==. J.C.	[reply]
Re: Can't use an undefined value as a symbol reference by toohoo (Beadle) on Aug 09, 2013 at 12:46 UTC
Hello Pelmonks, I have the same error message. Should I post my problem here or rather open a new thread? Thanks in forehand, Thomas	[reply]
Re^2: Can't use an undefined value as a symbol reference by choroba (Cardinal) on Aug 09, 2013 at 12:50 UTC
If your code is different, you should probably start a new thread (this one is 3 years old, anyway). لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ	[reply]
Re^3: Can't use an undefined value as a symbol reference by toohoo (Beadle) on Aug 09, 2013 at 13:32 UTC
Hello and sorry for the question, I did write a new question but cannot see. Can anyone? thanks in forehand, Thomas	[reply]
Re^4: Can't use an undefined value as a symbol reference by choroba (Cardinal) on Aug 09, 2013 at 13:38 UTC
Re^5: Can't use an undefined value as a symbol reference by toohoo (Beadle) on Aug 09, 2013 at 13:42 UTC