Fellow Monks, I seek your Perls of wisdom.

I have an array of arrays. the lower level arrays are records with values both numeric and alpha. I want to give the user the option to sort on any of these fields. I thought it would be nice to use a simple hash table referencing the record number to sort on and the comparator to use. I am having a problem using a variable containing comparator. Am I missing something or do I just need another approach?

my $sort = 'hours'; # really comes from a switch

my %map = ( #     sorting map
    hours => [0, \sub {<=>}],
    code  => [1, \sub {cmp}],
    name  => [2, \sub {cmp}],
);

# example data 
my @records = (
   [10, 'xyz232', 'secret project'],
   [ 5, 'foo123', 'world domination'],
   [ 7, 'bar666', 'have a beer'],
);

for (
     sort {$a->[$map{$sort}->[0]] $map{$sort}->[1] $b->[$map{$sort}->[
+0]]} 
     @records
   ) {
   print join ", ", @$_;
}

[download]

Update

among many variations of syntax I also tried the following. I feel it may be getting closer, other than the fact it won't compile :) 
my %map = (
    hours  => sub {sort { $_[0] <=> $_[0] } };,
    number => sub {sort { $_[0] <=> $_[0] } };,
    name   => sub {sort { $_[0] <=> $_[0] } };,
    task   => sub {sort { $_[0] <=> $_[0] } };,
);

[download]

Cheers,
R.

Pereant, qui ante nos nostra dixerunt!

In reply to Comparing spaceships (cmp and <=> as options) by Random_Walk

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