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Creating Reports with hashes: Use of uninitialized value while adding integers

by GertMT (Friar)
on Jan 26, 2012 at 15:09 UTC ( #950114=perlquestion: print w/ replies, xml ) Need Help??

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  1. or download this
    my $quant = $tree_collection{$years}{$trees}{$size} || 0;
    
  2. or download this
    || 0
    
  3. or download this
     $year_total += $total;
    
  4. or download this
    #!/usr/bin/perl -w
    use strict;
    ...
    2008,Basswood,25,9
    2011,Pine,11,5
    

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