Re^2: what is @$varname in perl

i read up on reference and understand a scalar is assigned as reference :

my @array = (1, 2, 3, 'four');
    my $reference = \@array;
[download]

i modified using your suggestion as below

foreach $line (@lines){
            chomp $line;
            $count++;
            next unless $count; 
            my @row = ();
            @row = split(/,/, $line );
            push @sheet2 , \@row;
        }

        foreach my $row ( sort {$a->[0] cmp $b->[0] || $a->[1] cmp $b-
+>[1]}  @sheet2 )             #sorting based on date ,then stockcode
        {          
            chomp $row;
            print hanw join (',', @$row ),"\n";
        }
[download]

then why assign @sheet2 as reference

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Re^3: what is @$varname in perl by 2teez (Vicar) on Jul 03, 2014 at 15:35 UTC
this : `... my $row; @$row = split(/,/, $line ); push @$sheet2 , $row; ...` [download] OR `... my @row = (); @row = split(/,/, $line ); push @sheet2 , \@row; ...` [download] Could be written like this in one line instead of three `... push @sheet2, [ split(/,/, $line ) ]; ...` [download] And there is no need for the array variable row at all. You could use Data::Dumper to view your variable @sheet2 to confirm. If you tell me, I'll forget. If you show me, I'll remember. if you involve me, I'll understand. --- Author unknown to me	[reply] [d/l] [select]
Re^3: what is @$varname in perl by perlfan (Parson) on Jul 04, 2014 at 03:18 UTC
`push @sheet2 , \@row;` [download] You're pushing a reference to @row as an item into @sheet2. In order to create complex data structures (array of arrays, array of hashes, etc) you need to assign references.	[reply] [d/l]