Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?
 
PerlMonks  

comment on

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

Interestingly, perl6 allows for coroutines. Parrot will be largely based on a closely related concept, called continuations.

(As far as I can tell, a continuation is a coroutine with it's state wrapped in an object.)

They're extremely useful in certian cases.

Think of a CGI script. If you have continuations, you can pretend that the entire conversation with the user takes place within one coherent program, and that you're waiting for the user to respond, instead of being re-invoked on every return.

Think of an iterator, that was written in terms of continuing it's running, instead of calling into the same sub over and over.

It's possible to write both things without using contations, but contuations can produce cleaner code... if used carefuly, and in the right places. (Much like threads, which are also related. Like threads, they can be tricky to get working properly, and they can produce ugly and innefficent code if used poorly.)


In reply to Re: Coroutines in Perl by theorbtwo
in thread Coroutines in Perl by leriksen

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 studying the Monastery: (6)
As of 2022-12-01 15:41 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    Notices?