use 5.14.2;
use warnings;

use Text::CSV_XS qw(csv);

my (@a, @b);
my $aoa = csv (
    in      => *DATA,
    headers => "skip",
    filter  => {
        1 => sub { push @a, $_; 1 },
        2 => sub { push @b, $_; 0 },
        });

{   local $" = ", ";
    say "var secid = [@a]";
    say "var Initial_shares = [@b]";
    }

__END__
secid,Initial_shares
002826,3777
0028262,3777
0028262,3777
0028262,3777
0028262,3777
0028262,3777

##</code><code>##

var secid = [002826 0028262 0028262 0028262 0028262 0028262]
var Initial_shares = [3777 3777 3777 3777 3777 3777]

##</code><code>##

my %h;
my $aoa = csv (
    in      => *DATA,
    headers => "auto",
    filter  => { 1 => sub { for my $f (keys %_) { push @{$h{$f}}, $_{$f} }; 0 }},
    );

##</code><code>##

{   Initial_shares   => [
        3777,
        3777,
        3777,
        3777,
        3777,
        3777
        ],
    secid            => [
        '002826',
        '0028262',
        '0028262',
        '0028262',
        '0028262',
        '0028262'
        ]
    }