in reply to Perl OOP

Ad 3: As Moose introduces some types (but no compile time checking, sorry), you can simulate kind of Generics with parameterized roles:
#!/usr/bin/perl use warnings; use strict; { package MyCollection; use MooseX::Role::Parameterized; parameter name => ( isa => 'Str', required => 1, ); parameter member_type => ( isa => 'Str', required => 1, ); role { my $p = shift; has $p->name => (is => 'ro', isa => 'ArrayRef[' . $p->member_t +ype . ']'); }; }; { package MyClass; use Moose; with MyCollection => { name => 'list', member_type => 'Int' }; __PACKAGE__->meta->make_immutable; } my $obj = 'MyClass'->new(list => [ 1, 2, 3 ]); my $invalid = 'MyClass'->new(list => [ 1, 2, 3.14 ]); # Throws as 3.14 + is not an Int.
($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord }map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

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Re^2: Perl OOP
by tobyink (Canon) on Jul 07, 2017 at 15:55 UTC
    use Types::Standard qw(Int); tie my @list, Int; push @list, 1; push @list, 2; push @list, 3.14; # dies