Beefy Boxes and Bandwidth Generously Provided by pair Networks
We don't bite newbies here... much
 
PerlMonks  

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??
Since answers to your question have been given already I just felt like writing the test code without a lot of extra variables, just because I love map: $_->() for map @$_, values %HoL; If you don't want all values, and/or want the subroutines in order, you can do: $_->() for map @$_, @HoL{qw/ one two /}; I don't know if it's more readable, but personally I find it more concise and more straight to the point than nestled for loop with extra and only once used variables.

If you want the return values from the callbacks it gets extra nifty: @ret = map $_->(), map @$_, @HoL{qw/ one two /}; I also want to warn about dereferencing the callback without parentheses, as often seen when using the & to dereference it. It doesn't do what you think, and the issue is covered in perlfaq7, "What's the difference between calling a function as &foo and foo()?".

Looking at the code again though, I noticed that you do (\&hello, \&goodbye,) There's nothing wrong with that, but I figured you'd perhaps be glad to know that you can use the dangerously-looking \(&hello, &goodbye,) instead to save yourself a couple of backslashes. No, the subroutines does not get called. \(...) is quite special. Be sure to check it out in perlref (perlop will just point you there anyway).

Cheers,
ihb

PS. Yes, I love map. :)

In reply to Re: Hash of Hash of Listed subroutines by ihb
in thread Hash of Hash of Listed subroutines by c

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 browsing the Monastery: (5)
As of 2024-03-28 11:06 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found