#!/usr/bin/perl -w
use strict;

my $str = '129-129A & B-131 NORTH AV';

print "\nDon't check for undefined matches\n";
while ($str =~ m[(.*?)(?:\s*([&/+-])\s*|\s+)]g){
    print "\$1='$1'\t\t\$2='$2'\n";
}

print "\nCheck for undefined matches\n";
while ($str =~ m[(.*?)(?:\s*([&/+-])\s*|\s+)]g) {
    my $one = "undef"; my $two = "undef";
    $one = $1 if defined $1;
    $two = $2 if defined $2;
    print "\$1='$one'\t\t\$2='$two'\n";
}

print "\nPseudo Split\n";
my @b = ($str =~ m[(.*?)(?:\s*([&/+-])\s*|\s+)]g,$');
foreach (@b) {
   $_="undef" unless defined $_;
   print "'$_',\n";
}