Re^2: Annoying 'Use of uninitialized value in concatenation' warning

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Re^3: Annoying 'Use of uninitialized value in concatenation' warning by FunkyMonk (Bishop) on Oct 27, 2011 at 15:05 UTC
If you use diagnostics perl will tell you which category the warning belongs to. For example, printing an uninitialised variable yields (the category is in bold): Use of uninitialized value $x in print at /home/bri/foo.pl line 14 (#1) (W uninitialized) An undefined value was used as if it were already defined. It was interpreted as a "" or a 0, but maybe it was a mistake. To suppress this warning assign a defined value to your variables. Additionally, perldiag lists all of perl's warning and error messages. Perl: perlintro perlretut perldoc Basic debugging checklist Yes, even you can use CPAN PerlMonks: How do I post a question effectively? Markup in the Monastery How do I post a question effectively? I know what I mean. Why don't you? General: How To Ask Questions The Smart Way What every computer scientist should know about floating-point arithmetic To Be Continued...	[reply]

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Re^3: Annoying 'Use of uninitialized value in concatenation' warning
by FunkyMonk (Bishop) on Oct 27, 2011 at 15:05 UTC

Use of uninitialized value $x in print at
/home/bri/foo.pl line 14 (#1)
(W uninitialized) An undefined value was used as if it were already
defined. It was interpreted as a "" or a 0, but maybe it was a mistake.
To suppress this warning assign a defined value to your variables.

perldiag

Perl: perlintro    perlretut    perldoc    Basic debugging checklist    Yes, even you can use CPAN
PerlMonks: How do I post a question effectively?    Markup in the Monastery    How do I post a question effectively?    I know what I mean. Why don't you?
General: How To Ask Questions The Smart Way    What every computer scientist should know about floating-point arithmetic
To Be Continued...

[reply]