Recursively traverses two data structures and tests for match. Takes any data type; arrays and hashes must be passed by reference. Returns false if two arrays have the same items in a different order. Streamlined for speed with large numbers of data items.
EDIT: Edited to test CODE refs.
use strict;
use warnings;
sub match {
return ($_[0] eq $_[1] ? 1 : 0) if ! ref $_[0] && ! ref $_[1];
my ($x, $y, $i) = @_;
return 0 if ref $x ne ref $y;
if (ref $x eq 'ARRAY') {
return 0 if $#$x != $#$y;
for ($i = 0; $i <= $#$x; $i++) {
return 0 if ! match($x->[$i], $y->[$i]);
} return 1;
}
if (ref $x eq 'HASH') {
return 0 if scalar keys %$x != scalar keys %$y;
my @x = sort keys %$x;
my @y = sort keys %$y;
for ($i = 0; $i <= $#x; $i++) {
return 0 if $x[$i] ne $y[$i];
}
for ($i = 0; $i <= $#x; $i++) {
return 0 if ! match($x->{$x[$i]}, $y->{$y[$i]});
} return 1;
}
return ($x eq $y ? 1 : 0);
}
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