Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

As an aside, it can be useful to rig-up a “data walker” object that will iterate through a data-structure ... search for “walker” ... and then perhaps maintain a push-down stack of such objects.   Once, I solved a similar problem by devising a walker that would call a specified sub (coderef ...) when it found a matching node.   Each subroutine in turn made the decisions that needed to be made at that level, and spawned another walker-instance to proceed further.   Thus, the walkers handled the task of navigation while the subroutines made the case-specific decisions.   (It was a lot easier to do than to describe.)   I did it this way because, while I could not predict what the shape and depth of the structure would be, I could describe the logic as a small number of reusable, node-specific cases.

In reply to Re: XPath-like method for searching/editing structures by sundialsvc4
in thread XPath-like method for searching/editing structures by nglenn

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, 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, 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.
  • Log In?

    What's my password?
    Create A New User
    [choroba]: :-D

    How do I use this? | Other CB clients
    Other Users?
    Others about the Monastery: (10)
    As of 2018-05-28 11:05 GMT
    Find Nodes?
      Voting Booth?