Columns in double dimension array

[torres09]

Hello monks

I am taking columns from a csv file , now I don't have the exact number of columns so I wish to use Double dimension array

so here is what I am doing

 
sub column_segregation
{
    
    my ($file,$col) = @_;
    use Text::CSV;
        
  my @array_A2 = ();
  open my $io,'<',$file or die "$!";
  my $csv = Text::CSV->new ({ binary => 1 });
  while (my $row = $csv->getline($io)) {
    push @array_A2, $row->[$col];
  }
  close $io;
  return (@array_A2);                                 

}

so this routine will return an array , now i want each column should go to each corresponding column in Double dimension array. i.e. column 1 should go to column of 1 DD array and so on .

So I have never worked with DD array so how to put it in the DD array column is what I need help with <\n>

[kcott]

G'day torres09,

You asked about this less than 48 hours ago: indefinite number of columns

You were provided with code for doing this and links to documentation explaining about this. How about you go back and read what's already been provided.

If there was something you didn't understand, either in the code examples posted or the documentation linked to, then ask a specific question about that issue.

[Skeeve]

I think, I don't understand the problem completely.

 $csv->getline($io) already returns a ref to an array where, each entry "n" is the cell of column "n+1".

So this should already give you the correct array:

while (my $row = $csv->getline($io)) {
    push @DD, $row;
}

$DD[$r][$c] should give you the entry in row "r+1" and column "c+1".

[Anonymous Monk]

So I have never worked with DD array so how to put it in the DD array column is what I need help with

Hmm, some of the answer in indefinite number of columns show that, so Basic debugging checklist to Data::Dump::dd some data to find out which one is the one you want

Another example of working with arrays of arrays is in How to traverse a two dimentional array in a constructor? including a link to a free book which teaches this

[mtmcc]

The documentation for array of arrays is here.

Also, you could google it.

I hope that helps.

-Michael

[BillKSmith]

Strictly speaking, perl does not support double dimension arrays. It simulates them very well with arrays of references! The implication of this is that you cannot ignore the discussion of references in the doucmentation you have alread been given.