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  1. or download this
        my @new= ConvertTo( $toUnits, $fromUnits, @old );
  2. or download this
    #   <--------- inches ---------><----- ft ----->
        my @inches= ConvertTo( 'in', 'ft', 1, 2, 3 );
        # @inches is now ( 12, 24, 36 )
    
  3. or download this
        my $toInFromFt= ConvertTo( 'in', 'ft' );
        while(  <IN>  ) {
            chomp;
            print OUT $toInFromFt->($_), $/;
        }
    
  4. or download this
    my @table = (
        #### temperature
    ...
        # Pick one of the solutions at random: (:
        return split ' ', (@source{@sol})[rand @sol];
    }