Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister
 
PerlMonks  

comment on

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

A few possibilities. Here are two. The first is a minor change to the code:

my $root; insert( \$root, 5 ); insert( \$root, 3 ); #... sub insert { my ($treeref, $value) = @_; my $tree = $$treeref; unless ($$treeref) { $tree = {}; #... $$treeref = $tree; } #...
This just makes it explicit that the variable being passed in (by reference) may be modified.

Another possibility is to have a "create tree" function for when the tree doesn't exist yet, and returns the initialised tree, possibly with the first value being required. The insert function would then need to tell if the tree is pristine and not yet populated (if the first value isn't required during create) to determine whether a new node was needed or not. The create-tree function would construct the tree - so we could call it a constructor. And we're basically at OO, all you have to do is bless the return :-)


In reply to Re^2: Binary Search Tree Debug Question by Tanktalus
in thread Binary Search Tree Debug Question by bichonfrise74

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others contemplating the Monastery: (4)
As of 2022-12-02 10:19 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    Notices?