Dear monks, I am having difficulty refreshing myself on referencing multidimensional arrays, I am sure I knew this before but it eludes me now. Whether my approach to this is just nonsense or whether its OK but my referencing is wrong I am not sure but I am pretty sure I have done this in the past. My code is this: 
use strict;

my @myarr;

my $lpn;
my $ppn;
my $i;

for ($i=0;$i<15;$i++) {
    ($lpn, $ppn) = get_ns($i);
    push @{ $myarr[$lpn] }, $ppn;
}    

for my $index (0..$#myarr) {
    next unless defined $myarr[$index];

    my @tmp;
    for my $subindex (0..scalar(@{$myarr[$index]})-1) { 
        my $date;
        for ($date=0;$date<10;$date++) {
            $tmp[$date] = get_date($index, $subindex);        
        }
        push @{$myarr[$index][$subindex]}, [ @tmp ];
    }
}

sub get_ns {
    return (int(rand(100)), int(rand(100)));
}

sub get_date {
    return get_ns;
}

[download]
I get 

Can't use string ("23") as an ARRAY ref while "strict refs" in use at 
+./eg.pl line 24.

[download]
when I try to run it, and my line 

push @{$myarr[$index][$subindex]}, [ @tmp ];

[download]

seems to be the problem - I've tried all the variations on syntax I can remember trying to hit on the correct one and searched perlmonks for similar questions but I can't find examples with 3 levels of array and moving from 2 to 3 seems to be my problem. However perhaps I am not seeing that somewhere I am making a mistake higher up and that I am indeed referencing it right but not stuffing the right values and hence causing the error, I am not sure.

If anyone can point out my error it would be hugely appreciated.

Pete

In reply to Adding cols to 3d arrays - syntax by peterrowse

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.