Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
If you want to have a subroutine apply some kind of "action" for you, to several things (internal to that subroutine), then you can use a subroutine reference. Example:
while ( (my $key, my $value) = each %partners) { if ($item eq $key) { ($partners,$email,$nickname,$realname,$postcode,$phone) = (@$v +alue); push (@allmembers, $item); my @partners_split = split / /, $partners; push (@allmembers, @partners_split); } }
Becomes:
sub do_thing { my ($partners,$item,$action) = @_; while ( (my $key, my $value) = each %$partners) { if ($item eq $key) { $action->($key,$value) } } } do_thing(\%partners,$item,sub { my ($key,$value) = @_; ($partners,$email,$nickname,$realname,$postcode,$phone) = (@$value +); push (@allmembers, $item); my @partners_split = split / /, $partners; push (@allmembers, @partners_split); }); # and then, you can do other things: do_thing(\%partners,$item,sub { my ($key,$value) = @_; # do other stuff with %partners, $item, $key, $value, etc });
That's the general idea, at least... that you would create an anonomus subref and pass it into your subroutine as one of the parameters. Think: map or grep.

On an additional note... I hope this code is just a thrown-together (not well-thought) example, as doing something like:

while ( (my $key, my $value) = each %partners) { if ($item eq $key) { ... } }
Is really just silly. You'd be much better off just doing stuff to $partners{$item}.
------------ :Wq Not an editor command: Wq

In reply to Re: creating a subroutine for accessing hash of arrays by etcshadow
in thread creating a subroutine for accessing hash of arrays by jonnyfolk

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 chilling in the Monastery: (3)
As of 2023-02-04 03:21 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    I prefer not to run the latest version of Perl because:







    Results (30 votes). Check out past polls.

    Notices?