Re: Use of uninitialized value in concatenation (.) or string

Japhy is right, initialization is the key.

I sheepishly admit I come from the old school where declaring variables is necessary. A sideline from starting as a COBOL, RPG, and Transact programmer. It became a habit and use strict; requires it. See Perldoc strict for more info.

This will get you there:

use vars qw($OURVAR) = ();
[download]

Add other variables inside the parens to initialize them too.

-Kurt

Comment on Re: Use of uninitialized value in concatenation (.) or string Download Code

Replies are listed 'Best First'.
Re: Re: Use of uninitialized value in concatenation (.) or string by P0w3rK!d (Pilgrim) on May 20, 2003 at 15:18 UTC
Read the code again. use strict; is everywhere. Thanks :)	[reply]
Re: Re: Re: Use of uninitialized value in concatenation (.) or string by KPeter0314 (Deacon) on May 20, 2003 at 22:21 UTC
What is meant is that use strict; requires that variables be initialized. To quote from the perldoc:strict where strict vars is implied by not specifying what to be strict about: `"strict vars" This generates a compile-time error if you access a variable that wasn't declared via "our" or "use vars", localized via "my()", or wasn't fully qualified.` [download] The use vars qw($OURVAR) = (); pragma actually declares the variable $OURVAR and initializes it to a known null value instead of leaving it uninitialized. Perl cares about the difference. -Kurt	[reply] [d/l]