Could I interest you in a more modern data structure for your result, a hash for example?
#!/usr/bin/perl
use warnings;
my $string = "one=1,three=3,five=5";
%f=map {m/(\w+)=(.*)/} split /,/, $string;
use Data::Dumper;
print Dumper(\%f);
#prints
$VAR1 = {
'three' => '3',
'five' => '5',
'one' => '1'
};
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