Beefy Boxes and Bandwidth Generously Provided by pair Networks
XP is just a number
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Calling conventions
Unless you really, really know what you're doing you should use subroutine($arg1,$arg2); to call any subroutine. AFAIK there is now no type of subroutine that MUST be called with a leading ampersand or without comma's seperating the arguments.

For methods; always use $object_or_class->methodname($arg,$arg2);

prototypes
If you use prototypes you can make it a little easier to use the other calling conventions but in general it's not needed unless you really want to write a subroutine that looks like a sort of operator on code blocks. Be sure to read up on prototypes before use, and only use them when you really need to.

defining and use of subs
If you don't use the default calling convention, you should define your subs (or a stub) before calling them. Subroutines that use "external" lexical variables that need to be intialized before calling should also be defined before calling (but that's just because you probably want the lexical initialisation near the definition of the sub).

summary
If you want to be safe, define your subs first and always use subroutine($arg,$arg2) unless you have a good reason not to.

Joost.


In reply to Re: Subroutine Bewilderment by Joost
in thread Subroutine Bewilderment by dimar

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 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 avoiding work at the Monastery: (3)
As of 2021-11-27 21:47 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found

    Notices?