Beefy Boxes and Bandwidth Generously Provided by pair Networks
Keep It Simple, Stupid
 
PerlMonks  

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??

The whole concept of a hash is having a hashing function, a sort of check-sum. So an 'isEqual' function just doesn't enable making a hash.

You can emulate a hash using a tree if you provide an 'isLessThan' function. But you'd have to implement an ordered tree rather than just use Perl's hashes.

But just about any 'isEqual' function can be transformed into a 'getKey' function that returns a string such that isEqual($a,$b) iff getKey($a) eq getKey($b). And, you've surely realized, the result of getKey can be used as the key in a Perl hash.

- tye        


In reply to Re: Using references as hash keys by tye
in thread Using references as hash keys by Ovid

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?Last hourOther CB clients
Other Users?
Others contemplating the Monastery: (4)
As of 2024-03-29 00:31 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found