If I want to take one "row" of my array-of-arrays and copy it to a separate array, is this correct: @SeparateArray = @{ MyAoA[$i] };
Barring the typo(?), yes that's right: 
@SeparateArray = @{ $MyAoA[$i] };

[download]

And if I want to do the opposite (copy my separate array into a row of my array-of-arrays), is this correct: @{ $MyAoA[$i] } = [ @SeparateArray ];
No, the types of either side of = must be, erm, equal. The first example below will add a reference to @SeparateArray to your AoA. That is, if you later change @SeparateArray, it'll change the contents of your AoA. Use the second example below if you don't want that to happen.

$MyAoA[$i] = \@SeparateArray; # reference
@{ $MyAoA[$i] } = @SeparateArray; # copy

[download]

Finally, if I want to copy an entire array-of-arrays (and not just have references to the first one), can I simply write: @NewAoA = [ @OldAoA ]; or do I need to build a "for" loop to replace each component array separately, e.g.: @{ $NewAoA[$i] } = @{ $OldAoA[$i] };
Yes, you need a for loop to make copies of each of the array references.

Have you seen the Data Structures Cookbook?

update: fixed some typos
update^2: Added link to perldsc

In reply to Re: Questions about using array-of-arrays by FunkyMonk
in thread Questions about using array-of-arrays by jep1978

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.