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Comment by juan_juarez | Hacker News Reader

There's a school of writing "modern" Perl, using source filters and object systems. Bare Perl is a mess but, in somewhat of a Lispy way, you can use Perl to rewrite your Perl. If none of your functions have signatures and you're manually blessing objects, your codebase will quickly turn to shit. Using a standard bits (such as Moose) to give you a consistent object system and method call syntax changes things dramatically.

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This is a new fad and it undoubtedly leads to more maintainable code, but it still feels like a bad tradeoff to me: you get the verbosity of stricter languages without the benefit (compile-time errors) at worse performance than plain Perl. I'd rather write something new in Scala or Go nowdays than in strict "modern Perl" style / Moose (and I've used Perl almost exclusively for the past 13 years).

umm, verbosity?

  package Point;
  use Moose; # automatically turns on strict and warnings
  has 'x' => (is => 'rw', isa => 'Int');
  has 'y' => (is => 'rw', isa => 'Int');
  sub clear { my $self = shift; $self->$_(0) for qw/x y/}

Verbosity.

    class Point {
        has Int $.x is rw;
        has Int $.y is rw;
        method clear() { $.x = 0; $.y = 0; }
    }

Perl 5.18 may have the following:

  use mop;
  class Point {
    has $x = 0;
    has $y = 0;
    method clear { ($x, $y) = (0, 0) }
  }

ref: https://github.com/stevan/p5-mop/blob/master/t/000-examples/...

Looks like a noble attempt to remove perl5 and ruby pain in the arse points simultaneously. Wonder if it will ever come to anything ...?

Perl 6 is / will be sweet :)

Perl 6 is sweet, and will be sweeter when it has better performance. :)

Source filters? Hahahahaha. The only acceptable source filter to use is Smart::Comments - https://metacpan.org/module/Smart::Comments - and even then, if you fire up code using Smart::Comments in the interactive debugger it's going to be a pain in the arse.

Moo/Moose (and Mo and Mouse if you must) are on the other hand game changers.

I definitely recommend reading "Modern Perl". It is a game changer.

http://www.onyxneon.com/books/modern_perl/index.html

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