From: "Gunnar Hjalmarsson" <[EMAIL PROTECTED]>
> >> You don't need another hash.
> >>
> >> perldoc -f sort
> >> perldoc -q "sort a hash"
> >>
> >> my @codes = sort {
> >> $comp{$a}{$year}{profit}
> >> <=>
> >> $comp{$b}{$year}{profit}
> >> } keys %comp;
> >
I have tried that, but it gave me an error telling that $year is undefined.
$year should be a variable but the sort function should loop through all
the years for every code of all the companies, and return the biggest
profit.
That's why I think I need to use a second hash that uses the code of the
companies as a hash key and the profit as its values.
Teddy
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