Yes, very helpful.

I was anticipating a sub generator of some sort, where the hash and comparison function are passed in, and a new anonymous sub is returned. This sub could then be used in the code block position of the sort command.

Perhaps something like this, which steals some ideas from Choroba's post, though I've not tried it:

sub make_sort_sub {
    my $coderef = shift;
    my $hashref = shift;
    my $sort_sub = sub { something goes here }
    return $sort_sub;
}

my %hash = ( a => 5, b => 4, c => 3 );
my $keys_by_value = make_sort_sub(
    { $hashref->{$a} <=> $hashref->{$b} },
    \%hash);
my @keys_sorted_by_value = sort $keys_by_value %hash;
[download]

Then $keys_by_value can be reused elsewhere on the same hash. But can't be used on a different hash. :(

Hmmm, I'm thinking there's not a really elegant solution.

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.