Perl is not forcing any particular style. If you don't care about maintainability you can quickly hack code which will solve the problem but will be hard to understand/update. If you do you can use tools like Perl::Critic to enforce a certain style. And lack of documentation and comments (which makes maintenance harder) IMHO not language specific problem at all.
> and there are no test cases
Modules on CPAN had tests back when open-source libraries in other languages didn't have any. It's not hard to write tests for Perl code but if you don't have time to write them or it is not a priority it's unfair to blame the language.
Perl is not forcing any particular style. If you don't care about maintainability you can quickly hack code which will solve the problem but will be hard to understand/update. If you do you can use tools like Perl::Critic to enforce a certain style. And lack of documentation and comments (which makes maintenance harder) IMHO not language specific problem at all.
> and there are no test cases
Modules on CPAN had tests back when open-source libraries in other languages didn't have any. It's not hard to write tests for Perl code but if you don't have time to write them or it is not a priority it's unfair to blame the language.