Okay, duh, thanks.

Another question though; here's why I often use the "anonymous lambda" style (dynamic sub): if I do something like this (embedded sub): 

sub traverse {
  my $start_node = HTML::TreeBuilder->new;
  $start_node->parse_file(shift);

  {
    my $counter = 'x0000';
    sub give_id {
      my $x = $_[0];
      $x->attr('id', $counter++) unless defined $x->attr('id');
      foreach my $c ($x->content_list) {
        give_id($c) if ref $c; # ignore text nodes
      }
    };
    give_id($start_node);
  }
}

[download]
The var $counter is captured in the closure and does not get reset even though I'd like it to be reset. It's either this way and moving and resetting $counter by hand outside the block (which I won't do because it's logically inside the function and also easy to forget) or using the dynamic sub and risk a memory leak - how would I get the best of both worlds (uncaptured var + no risk of memory leak). Using a private embedded package or putting everything in it's own package seems wordy.

Thanks for the enlightenment.

In reply to Re: Re: Q on HTML::Element recursive lambda comment by lucylane
in thread Q on HTML::Element recursive lambda comment by lucylane

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.