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  1. or download this
    #! perl
use warnings;
...

print "The element with key $highest_key " .
      "has the highest value $highest_value\n" if defined $highest_key
+;
  2. or download this
    12:36 >perl 591_SoPW.pl
4 key has value 7
...
The element with key 1 has the highest value 8

12:38 >
  3. or download this
    if (!defined $highest_value || $highest_value lt $value)