And without an explicit counter variable: 
my @cols;
for my $row (@array) {
    my @f = split /,/, $row;
    push @{$cols[$_]}, $f[$_] for 0 .. $#f;
}

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Makeshifts last the longest.

In reply to Re^3: Arrays manipulation (no $i either) by Aristotle
in thread Arrays manipulation by hotshot

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