X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=moose-class%2Fslides%2Findex.html;h=67fcb8e6b3fadea9b8573f8b39f92f7d58624414;hb=1847dd9ee8e1f995b293d12f2dc700b6f43092dc;hp=992d256381abc92e3ffbd02249933184b8c96856;hpb=1c32806a415472ca126fcba161ec8e15ed45540f;p=gitmo%2Fmoose-presentations.git
diff --git a/moose-class/slides/index.html b/moose-class/slides/index.html
index 992d256..67fcb8e 100644
--- a/moose-class/slides/index.html
+++ b/moose-class/slides/index.html
@@ -40,7 +40,7 @@ img#me05 {top: 43px;left: 36px;}
@@ -284,10 +287,10 @@ use Moose;
has blog_uri => (
is => 'rw',
isa => 'URI',
- handles => { 'blog_hostname' => 'host' },
+ handles => { 'blog_host' => 'host' },
);
-$person->blog_hostname;
+$person->blog_host;
# really calls $person->blog_uri->host
@@ -888,7 +891,6 @@ sub BUILDARGS {
if ( @_ == 1 && ! ref $_[0] ) {
return { ssn => $_[0] };
}
-
return $class->SUPER::BUILDARGS(@_);
}
@@ -962,6 +964,8 @@ sub BUILD {
extends is sugar for declaring parent classes- Also ensures metaclass compatibility between parent and child
+ - Do not
use base
package Employee;
@@ -1029,7 +1033,8 @@ use Moose;
override work => sub {
my $self = shift;
- die "Pay me first" unless $self->got_paid;
+ die "Pay me first"
+ unless $self->got_paid;
super();
};
@@ -1127,7 +1132,7 @@ Person->can('extends');
no Moose at the end of a package is a best practice- Or
namespace::clean at the top
+ - Or
use namespace::autoclean at the top
- Just do it
@@ -1195,6 +1200,8 @@ use Moose;
# perl bin/prove -lv t/01-classes.t
+# edit lib/Person.pm and lib/Employee.pm
+
Iterate til this passes all its tests
@@ -1212,11 +1219,10 @@ Iterate til this passes all its tests
-
Roles Can Have State and Behavior
+
Roles - State and Behavior
package HasPermissions;
use Moose::Role;
-
# state
has access_level => ( is => 'rw' );
@@ -1225,7 +1231,8 @@ sub can_access {
my $self = shift;
my $required = shift;
- return $self->access_level >= $required;
+ return $self->access_level
+ >= $required;
}
Classes Consume Roles
my $person = Person->new(
- first_name => 'Kenichi',
- last_name => 'Asai',
+ first_name => 'Kenichi',
+ last_name => 'Asai',
access_level => 42,
);
@@ -1326,7 +1333,7 @@ sub print {
# or ...
-if ( Person->meta->does('Printable') ) { ... }
+Person->meta->does('Printable')
@@ -1392,10 +1399,10 @@ use Moose;
use Moose;
with 'IsFragile' =>
- { alias =>
+ { -alias =>
{ break => 'break_bone' } },
'CanBreakdance' =>
- { alias =>
+ { -alias =>
{ break => 'break_it_down' } };
@@ -1411,13 +1418,13 @@ use Moose;
use Moose;
with 'IsFragile' =>
- { alias =>
+ { -alias =>
{ break => 'break_bone' },
- exclude => 'break' },
+ -excludes => 'break' },
'CanBreakdance' =>
- { alias =>
- { break => 'break_dance' },
- exclude => 'break' };
+ { -alias =>
+ { break => 'break_it_down' },
+ -excludes => 'break' };
@@ -1429,7 +1436,7 @@ use Moose;
sub break {
my $self = shift;
- $self->break_dance;
+ $self->break_it_down;
if ( rand(1) < 0.5 ) {
$self->break_bone;
}
@@ -1590,7 +1597,8 @@ has [ 'left', 'right' ] => (
use Moose::Util qw( apply_all_roles );
my $fragile_person = Person->new( ... );
-apply_all_roles( $fragile_person, 'IsFragile' );
+apply_all_roles( $fragile_person,
+ 'IsFragile' );
- Does not change the
Person class
@@ -1753,7 +1761,7 @@ Person->new(); # kaboom
- Attributes can have defaults
- - Simple non-referecne scalars (number, string)
+ - Simple non-reference scalars (number, string)
- Subroutine reference
- A builder method
@@ -1794,7 +1802,7 @@ has bank => (
-
Default as a Subroutine Reference
+
Subroutine Reference Default
- Called as a method on the object
@@ -1867,7 +1875,8 @@ has bank => (
sub _build_bank {
my $self = shift;
- return Bank->new( name => 'Spire FCU' );
+ return Bank->new(
+ name => 'Spire FCU' );
}
-
Lazy, Good for Nothing Attributes
+
Lazy, Good for Nothin' Attributes
- Normally, defaults are generated during object construction
@@ -2190,7 +2199,8 @@ has first_name => (
Exercises
# cd exercises
-# perl bin/prove -lv t/03-basic-attributes.t
+# perl bin/prove -lv \
+ t/03-basic-attributes.t
Iterate til this passes all its tests
-
Other Uses Example
+
More Modifier Examples
has password => (
is => 'rw',
clearer => 'clear_password',
);
-
has hashed_password => (
is => 'ro',
builder => '_build_hashed_password',
clearer => '_clear_hashed_password',
);
-
after clear_password => sub {
my $self = shift;
$self->_clear_hashed_password;
@@ -2344,7 +2353,6 @@ after clear_password => sub {
$self->_munge_insert(@_) );
$new_user->_assign_uri;
-
return $new_user;
};
Exercises
# cd exercises
-# perl bin/prove -lv t/04-method-modifiers.t
+# perl bin/prove -lv \
+ t/04-method-modifiers.t
Iterate til this passes all its tests
@@ -2663,8 +2670,9 @@ undef
subtype 'PositiveInt',
as 'Int',
where { $_ > 0 },
- message { "The value you provided ($_)"
- . " was not a positive number." };
+ message
+ { "The value you provided ($_)"
+ . " was not a positive int." };
has size => (
is => 'ro',
@@ -2743,7 +2751,9 @@ subtype 'Car',
use Moose::Util::TypeConstraints;
enum Color => qw( red blue green ) );
-my %ok = map { $_ => 1 } qw( red blue green );
+my %ok = map { $_ => 1 }
+ qw( red blue green );
+
subtype 'Color'
as 'Str',
where { $ok{$_} },
@@ -2775,9 +2785,13 @@ has size => (
subtype 'UCStr',
as 'Str',
- where { ! /[a-z]/ };
+ where { ! /[a-z]/ };
+
+
+
+
Coercions
-
coerce 'UCStr',
+
coerce 'UCStr',
from 'Str',
via { uc };
@@ -2825,8 +2839,6 @@ coerce 'My::DateTime',
package Person;
-use Moose::Util::TypeConstraints;
-
has height => (
is => 'rw',
isa => 'Num',
@@ -2843,7 +2855,7 @@ has favorite_numbers => (
More Droppings
- Moose::Util::TypeConstraint also needs cleanupMoose::Util::TypeConstraints also needs cleanup
package Person;
@@ -2875,7 +2887,6 @@ sub work {
{ isa => 'Bool',
default => 0 },
);
-
...
}
Digression: The Type Registry
- - Types are actually
Moose::Meta::TypeConstraint objects
+ - Types are actually
Moose::Meta::TypeConstraints objects
- Stored in an interpreter-global registry mapping names to objects
@@ -2928,7 +2939,6 @@ sub work {
Namespace Fix
use Moose::Util::TypeConstraints;
-
subtype 'MyApp::Type::DateTime',
as 'DateTime';
@@ -3108,7 +3118,8 @@ $alice->friend($bob);
use Moose;
has name => ( is => 'ro' );
-has friend => ( is => 'rw', weak_ref => 1 );
+has friend => ( is => 'rw',
+ weak_ref => 1 );
my $alice = Person->new( name => 'Alice' );
my $bob = Person->new( name => 'Bob' );
@@ -3227,7 +3238,6 @@ has lungs => (
package Person;
use Moose;
-
has account => (
is => 'ro',
isa => 'BankAccount',
@@ -3275,7 +3285,6 @@ has name => (
package Auditor;
use Moose::Role;
-
sub record_change { ... }
sub change_history { ... }
@@ -3316,7 +3325,6 @@ has history => (
package Person;
use Moose;
-
has _favorite_numbers => (
traits => [ 'Array' ],
is => 'ro',
@@ -3328,10 +3336,6 @@ has _favorite_numbers => (
add_favorite_number => 'push',
},
);
-
-
- - Automatically defaults to
[]
-
@@ -3339,7 +3343,6 @@ has _favorite_numbers => (
package Stack;
use Moose;
-
has depth => (
traits => [ 'Counter' ],
is => 'ro',
@@ -3397,7 +3400,6 @@ has ssn => (
isa => 'Str',
label => 'Social Security Number',
);
-
print Person->meta
->get_attribute('ssn')->label;
@@ -3451,7 +3452,8 @@ print Person->meta
Exercises
# cd exercises
-# perl bin/prove -lv t/06-advanced-attributes.t
+# perl bin/prove -lv \
+ t/06-advanced-attributes.t
Iterate til this passes all its tests
+ 