I have a tree that consists of several joined nodes, which are implemented as blessed hash references. Each node knows about its first child, its immediate parent, and its first sibling ({child_n}, {parent_n}, and {sibling_n} respectively). It's been pointed out to me that instead of using a singly-linked list for siblings I could have used an array ref, but I don't think that'll matter much, since order is important and so I only go through one way.

What I was wondering about is the best and most elegant way to do a postorder traversal of the tree. None of the solutions I've come up with are very elegant - I've used recursive _private_methods, recursive subroutine references, and a stack with a while { ... } continue { ... } loop, but nothing turns out very readable or convenient. Is there a better way?

Thanks in advance!

In reply to Traversing a simple tree by nightwatch

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.