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for ( 0..$#{$self->session->param('item')} ) {
    print $self->session->param('item')->[$_]."\n";
}

# to iterate the elements directly
for my $conf ( @{$self->session->param('item')} ) {
    print "$conf\n";
}

for ( my $i; $i <= $#{$self ->session->param('item') }; $i++ ) { 
    print $self -> session -> param('item') -> [$i ] . "\n";
}