DB<114> @a=  map { int rand 100 } 1..10 => (22, 15, 27, 44, 70, 85, 74, 93, 96, 14)

  DB<115> sub minindex { 
             my $x=\@_; 
             reduce { $x->[$a] < $x->[$b] ? $a : $b } 0 .. $#_ 
          }

  DB<116> print minindex @a
9