Hi monks,

I'm creating a few types of arrays in each iteration of a loop, and saving them as references within a hash who's value is also an array ref. 

foreach $file(@filenames){
open FILE, "$file";
while (<FILE>){
$array1 =();
$array2 = ();
#fill @array1;
array1_ref = \@array1;
#fill @array2;
array2_ref = \@array2;
}
$hash{$file} = [$array2_ref, $array1_ref]
)

#accessing the info:
print @$hash{$somefile}[1];

[download]

When I try to dereference to access the data, the arrays are empty, although I've verified that the references work within the foreach loop.

I think that this is because the references in the hash are pointing to something that gets zeroed and written over in each iteration of the loop. Is there a way to avoid giving new names to the arrays in each iteration, but still have them retain their memory address?

thanks, maayan

In reply to saving nested arrays in a hash by Anonymous Monk

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.