First, "$arr_ref_new = ( [1],[2],[3,4] );" can't possibly be what you want. You construct three arrays then proceed to discard two. (Why didn't you ask why you were getting "in void context" warnings?) So you're not clear on the inputs to your problem.

Second, you're not very clear on what output you want either.

I think you want: 

my $aoa = [ [1],[2],[3,4] ];
my @flat = map { @$_ } @$aoa;  # @flat = (1,2,3,4)

[download]

Update: Fixed variable name mismatch.

In reply to Re: Converting array reference to list context by ikegami
in thread Converting array reference to list context by pavunkumar

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.