my $x :Int = VALUE is exactly the sugar I want. I use 
my ($text, $page) = split "\t", $line;

[download]
in my addpdfbookmark.pl tool, $line is got from ocr, set '9O' to '90', I was very confused when 
warn $text, ' on page ', $page, ' must be wrong' if $page < $lastpage;

[download]
was triggered, I have to write a valid subroutine,
sub valid($){
    my ($text, $page) = split "\t", shift;
    $page =~ /^\d+$/ or die 'page not numbers';
    warn $text, ' on page ', $page, ' must be wrong' if $page < $lastp
+age;
    $lastpage = $page;
    return ($text, $page);
}

[download]
, It's better to declare it as an integer, But I got 'Invalid SCALAR attribute' error, use what can make it work?

In reply to Re^2: way of declare an integer variable instead use /^\d+$/ by vincentaxhe
in thread way of declare an integer variable instead use /^\d+$/ by vincentaxhe

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