for( my $i = 0; $i <= 9; $i++ ) {
  do_whatever( $topten[ $i ] );
}

# or

foreach( @topten[ 0 .. 9 ] ) {
  do_whatever( $_ );
}

# or

@topten = @topten[ 0 .. 9 ];
do_whatever( $_ ) foreach @topten;

# or 

$#topten = 9;
do_whatever( $_ ) for @topten;
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