Compare and merge array elements help!

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Hi Monks!

How could I combine or merge these two arrays based on if $ar_ref_1->[1] AND $ar_ref_2->[0] match, thanks or the help!

use strict;
use warnings;
use Data::Dumper;


my $ar_ref_1 = [
          [
            'USER 1',
            '12345',
            '2009',
            'X',
            '0',
            '8.00',
            ' ',
            '1- E'
          ],
          [
            'USER 3',
            '1234567',
            '2009',
            'X',
            '0',
            '8.00',
            ' ',
            '3- E'
          ],

          [
            'USER 2',
            '123456',
            '2009',
            'X',
            '0',
            '8.00',
            ' ',
            '2- E'
          ],
          [
            'USER 5',
            '123456789',
            '2009',
            'X',
            '0',
            '8.00',
            ' ',
            '5- E'
          ],
          [
            'USER 4',
            '12345678',
            '2009',
            'X',
            '0',
            '8.00',
            ' ',
            '4- E'
          ],

        ];

my $ar_ref_2 = [

          [
            '1234567',
            '12',
            '0',
            '2',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0'
          ],
          [
            '123456789',
            '0998',
            '2',
            '2',
            '3',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0'
          ],          
          [
            '123456',
            '657',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0'
          ],
          [
            '12345678',
            '8754',
            '0',
            '2',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0'
          ],
          [
            '12345',
            '876',
            '1',
            '2',
            '3',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0'
          ],
          
        ];
        

for my $i (0..$#$ar_ref_1) {

    for my $j (0..$#$ar_ref_2) {
    
       if($ar_ref_1->[1] == $ar_ref_2->[0]){

                                               push @{$ar_ref_1->[$i]}
+, @{ ref($ar_ref_2->[$i]) eq 'ARRAY' ?
                                                                      
+         $ar_ref_2->[$i] : [('-') x 3]   };
                                            }
        
                               }
    

}

print Dumper $ar_ref_1;
[download]

Here is what I am trying to get, I am sampling one element as an example:

          [
            'USER 4',
            '12345678',
            '2009',
            'X',
            '0',
            '8.00',
            ' ',
            '4- E'
            '12345678', # I need to exclude the duplicated element out
+ as well, it’s a nightmare!
            '8754',
            '0',
            '2',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0',
            '0'
          ],
[download]

Thank you!

Comment on Compare and merge array elements help! Select or Download Code

Replies are listed 'Best First'.
Re: Compare and merge array elements help! by ikegami (Patriarch) on May 07, 2009 at 15:58 UTC
`my %lkup = map { $_->[0] => $_ } @$ar_ref_2; for (@$ar_ref_1) { my $key = $_->[1]; if (my $extra = $lkup{$key}) { push @$_, @$extra[ 1..$#$extra ]; } else { warn("Bad join for $key\n"); push @$_, (undef)x11; } }` [download]	[reply] [d/l]
Re^2: Compare and merge array elements help! by Anonymous Monk on May 07, 2009 at 16:25 UTC
Hi, can't get your code to work with this, here is what I am getting: `Global symbol "$extra" requires explicit package... Global symbol "$extra" requires explicit package... syntax error near "}" syntax error near "}" Execution aborted due to compilation errors.` [download]	[reply] [d/l]
Re^3: Compare and merge array elements help! by ikegami (Patriarch) on May 07, 2009 at 16:38 UTC
There was a missing ")". Fixed.	[reply]
Re^4: Compare and merge array elements help! by Anonymous Monk on May 08, 2009 at 18:15 UTC
Re: Compare and merge array elements help! by rir (Vicar) on May 08, 2009 at 13:30 UTC
`my %users = map { $_->[0], $_->[1,-1] } @$ar_ref_2; my @answer = map { [@$_, $users{$$_[1]} ] } @$ar_ref_1;` [download] Be well, rir	[reply] [d/l]