Re^2: Variable in a foreach loop

... and then print the value of $max_rows one additional time.

ravi45722 is correct that the final print prints "0" - see my reply as to why.

use strict;
use warnings;

my $max_cols = 2;
my $max_rows = 3;
my $row_element = 0;
foreach my $col_element (0 .. $max_cols) {
    foreach $row_element (0 .. $max_rows) {
        print "$row_element\n";
    }
}
print "Last: $row_element\n";

__END__

0
1
2
3
0
1
2
3
0
1
2
3
Last: 0
[download]

Regards,
-- Hauke D

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Re^3: Variable in a foreach loop by perldigious (Priest) on Jul 14, 2016 at 13:51 UTC
Thanks haukex, I got there eventually, I just had to tweak the code so it would run to see that behavior and understand what ravi45722 was trying to point out. I would have been confused too if I had tried that and not dug through the foreach documentation, I always use `my` and explicitly update variables at a higher scope with assignments inside the loop body, so I've never seen this behavior before. I love it when things get difficult; after all, difficult pays the mortgage. - Dr. Keith Whites I hate it when things get difficult, so I'll just sell my house and rent cheap instead. - perldigious	[reply] [d/l]

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Re^3: Variable in a foreach loop
by perldigious (Priest) on Jul 14, 2016 at 13:51 UTC

Thanks haukex, I got there eventually, I just had to tweak the code so it would run to see that behavior and understand what ravi45722 was trying to point out. I would have been confused too if I had tried that and not dug through the foreach documentation, I always use my and explicitly update variables at a higher scope with assignments inside the loop body, so I've never seen this behavior before.

I love it when things get difficult; after all, difficult pays the mortgage. - Dr. Keith Whites
I hate it when things get difficult, so I'll just sell my house and rent cheap instead. - perldigious

[reply]
[d/l]