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

comment on

( [id://3333] : superdoc . print w/replies, xml ) Need Help??
What you want to do is accept a parameter input as the name of an arbitrary function to call? That is a symbolic reference, and is generally a bad idea (particularly in a CGI script - see some of Ovid's posts on that).

Instead I would suggest that you do something like this (untested):

use Carp; # So we can get verbose error messages # Time passes sub ret_str_sorter { my $field = shift; my $direction = shift; if ('ascending' eq $direction) { return sub { $data{$a}{$field} cmp $data{$b}{$field}; }; } elsif ('descending' eq $direction) { return sub { $data{$b}{$field} cmp $data{$a}{$field}; }; } else { confess("Direction '$direction' not understood"); } } # Time passes my $sorter = ret_str_sorter($field, $direction); my @ordered = sort $sorter keys %data;
ObRandomTip: Rather than working with an array of keys into a hash, instead restructure to have an array of anonymous hashes. This will generally lead to a cleaner design and no need to do things like pass the hash definition in through a global.

In reply to RE (tilly) 1: Dynamic sort algorithm selection by tilly
in thread Dynamic sort algorithm selection by Sentinel

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.