Re^2: Can't call method "abs" on an undefined value.

Ah ha! I knew it was something simple I was missing. Thanks that gives me enough to take a stab at it again.

reduce is included on the import list for List::Util in the main program I just forgot it in my sample. Adding it still gives the warning about $a and $b only being used once. I've updated the sample and my post.

Owl looked at him, and wondered whether to push him off the tree; but, feeling that he could always do it afterwards, he tried once more to find out what they were talking about.

Comment on Re^2: Can't call method "abs" on an undefined value.

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Re^3: Can't call method "abs" on an undefined value. by ikegami (Patriarch) on May 05, 2006 at 23:30 UTC
In this case, the warnings are wrong. Those variables are used more than once, but List::Util sets them in a fashion that Perl can't detect at compile-time. (Something like `*{caller() . '::a' = ...;`.) You can get rid of the warnings by including the following in your package: `$a = $a; $b = $b;` [download] Ignore the warnings when trying to find your error, they are misleading you. (But do change the variable name in `my $a = ...;` to something else!)	[reply] [d/l] [select]
Re^4: Can't call method "abs" on an undefined value. by HollyKing (Pilgrim) on May 05, 2006 at 23:49 UTC
Thanks! That took care of the warnings. Owl looked at him, and wondered whether to push him off the tree; but, feeling that he could always do it afterwards, he tried once more to find out what they were talking about.	[reply]