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if (some condition) {
   ... some code ...
...
   ... more code ...
   next;                                     # BOTH BRANCHES
}

$precords{$product_key}{"total_count"}++;
if (some condition) {
...
   ... more code ...
}
next;

for {
   if (value == '1') {
...
   }
   ... do nothing ...
}

for {
   if (value == '1') {
...
      ... do stuff ...
   }
}

if ($comboHashRef{$key}->[0] == '0')

if ($comboHashRef{$key}->[0] == 0)

if ($comboHashRef{$key}->[0] eq '0')