There's an typo in the code; the code block in the reduce statement should be
{ \($$a->{$b}) }
Also, when I tried the code as given (after fixing the above typo), I got the error:
% perl rec_walk.pl
Can't call method "List::Util::reduce" on unblessed reference at rec_w
+alk.pl line 9.
Here's the full code of the script that caused that error:
use strict;
my %myhash;
$myhash{bedrock}{flintstone}{fred} = 3;
my $ref = pointer_to_element(\%myhash, qw(bedrock flintstone fred));
sub pointer_to_element {
require List::Util;
return List::Util::reduce { \($$a->{$b}) } \shift, @_;
}
I couldn't figure out why the error, so I switched the code to
use List::Util 'reduce';
sub pointer_to_element {
return reduce { \($$a->{$b}) } \shift, @_;
}
and it worked great. Tres cool.