Borrowing hexcoder's suggestion here, the following code will get want you want (if I understand the problem correctly). 
#!/usr/bin/perl
use strict;
use warnings;

my @value;
my $col_count = 0;

while (<>) { # read from @ARGV (sample.txt sample_2.txt sample_3.txt)
    chomp;
    my (undef, @data) = split /:/;
    
    my $row_count = 0;
    
    for my $info (@data) {
        $value[$row_count++][$col_count] = $info;
    }
    ++$col_count;
}

for my $v (@value) {
    print join(" ", @$v), "\n";    
}

[download]
Using your 3 sample files, this prints: 
Line_1_1 Line_2_1 Line_3_1 Line_4_1 Line_5_1 Line_6_1 Line_7_1
Line_1_2 Line_2_2 Line_3_2 Line_4_2 Line_5_2 Line_6_2 Line_7_2
Line_1_3 Line_2_3 Line_3_3 Line_4_3 Line_6_3 Line_6_3 Line_7_3
Line_1_4 Line_2_4 Line_3_4 Line_4_4 Line_5_4 Line_6_4 Line_7_4

[download]
Chris

In reply to Re: How to concatenate a generic array of arrays and an array of hashes by Cristoforo
in thread How to concatenate a generic array of arrays and an array of hashes by thanos1983

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