X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=moose-class%2Fslides%2Findex.html;h=056d33b8459a696a7965458ae45ab880ecc14014;hb=a575fa9c8324958c05ae5a69a2d98aa907066ef8;hp=ff7b8ab45eab045ace186a531289e951567eea75;hpb=4b37a21f58441c0e5741e446de7c1f419c4a32db;p=gitmo%2Fmoose-presentations.git diff --git a/moose-class/slides/index.html b/moose-class/slides/index.html index ff7b8ab..056d33b 100644 --- a/moose-class/slides/index.html +++ b/moose-class/slides/index.html @@ -52,7 +52,7 @@ img#me05 {top: 43px;left: 36px;}

Introduction to Moose

-

Dave Rolsky +

Dave Rolsky

@@ -71,8 +71,8 @@ img#me05 {top: 43px;left: 36px;}
@@ -155,7 +155,7 @@ img#me05 {top: 43px;left: 36px;} 
package Person;
 use Moose;
 
-has first_name => ( is => 'rw' );
+has first_name => ( is => 'ro' ); @@ -950,10 +950,10 @@ sub BUILD {

Object Construction a la Moose

- 
Person->new(@_)
+ 
Person->new(@args)
    -
  1. Calls Person->BUILDARGS(@_) to turn @_ into a hashref
    2. +
  2. Calls Person->BUILDARGS(@args) to turn @args into a hashref
  3. Blesses a reference
  4. Populates attributes based on the hashref from #1
  5. Calls $new_object->BUILDALL($constructor_args) @@ -1032,7 +1032,7 @@ extends 'LWP';
  6. No DEMOLISH()
    7. -
  7. But see MooseX::NonMoose for a workaround
    8. +
  8. But MooseX::NonMoose fixes all of this
@@ -1054,13 +1054,13 @@ use Moose; extends 'Person'; -override work => sub { +override work => sub { my $self = shift; die "Pay me first" unless $self->got_paid; - super(); -}; + super(); +};
@@ -1069,7 +1069,7 @@ use Moose;
@@ -1155,8 +1155,8 @@ Person->can('extends');

Cleaning Up Moose Droppings

package Person;
-use namespace::autoclean;
 use Moose;
+use namespace::autoclean;
 
 ...
 
@@ -1234,7 +1234,7 @@ use Moose;
 
 # perl bin/prove -lv t/00-prereq.t
 
-# perl install-moose (if needed)
+## Read the instructions in t/01-classes.t
 
 # perl bin/prove -lv t/01-classes.t
 
@@ -1307,30 +1307,32 @@ sub print {
   
package Person;
 use Moose;
 
-with 'HasPermissions';

+with 'Printable';

Classes Consume Roles

-
my $person = Person->new(
+
package Person;
+
+sub as_string { $_[0]->first_name() }
+
+...
+
+my $person = Person->new(
     first_name   => 'Kenichi',
     last_name    => 'Asai',
     access_level => 42,
 );
 
-print $person->full_name
-    . ' has '
-    . $person->can_access(42)
-        ? 'great power'
-        : 'little power';

+$person->print();

Roles in Practice

@@ -1340,7 +1342,9 @@ print $person->full_name 
package Person;
 use Moose;
 
-with 'Printable';
+with 'Printable'; + +sub as_string { $_[0]->first_name() }
@@ -1351,6 +1355,8 @@ use Moose; with 'Printable'; +sub as_string { $_[0]->first_name() } + has has_been_printed => ( is => 'rw' ); sub print { @@ -1479,34 +1485,6 @@ Integer->does('Comparable'); # also true!
-

Name Conflicts Between Roles

- - 
package HasSubProcess;
-use Moose::Role;
-
-sub execute { ... }
-
-package Killer;
-use Moose::Role;
-
-with 'HasSubProcess';
-
-sub execute { ... }
-
- -
-

Delayed Conflict

- - 
package SysadminAssassin;
-with 'Killer';
- - -
- -

Roles as Interfaces

@@ -1656,8 +1634,6 @@ requires 'compare';

Real Examples

- - -
-

Method Modifiers Summary

- -
@@ -2699,7 +2614,7 @@ class_type 'DateTime';

Subtype Shortcuts - role_type

use Moose::Util::TypeConstraints;
-role_type 'Printable';
+role_type 'Printable';
@@ -2808,7 +2723,8 @@ coerce 'My::DateTime',

Coercion Examples

- 
coerce 'ArrayRef[Int]',
+  
# BAD CODE - DO NOT COPY
+coerce 'ArrayRef[Int]',
     from 'Int',
     via  { [ $_ ] };

 
@@ -2906,7 +2822,7 @@ sub work {
   
Digression: The Type Registry

 
   
    
-    
  • Types are actually Moose::Meta::TypeConstraints objects
    • 
+    
  • Types are actually Moose::Meta::TypeConstraint objects
    • 
     
  • Stored in an interpreter-global registry mapping names to objects
    •
@@ -3346,7 +3262,6 @@ has history => ( use Moose; has _favorite_numbers => ( traits => [ 'Array' ], - is => 'bare', isa => 'ArrayRef[Int]', default => sub { [] }, init_arg => undef, @@ -3409,7 +3324,7 @@ has account => ( isa => 'BankAccount', handles => { receive_100 => - [ 'deposit', 100 ] + [ 'deposit', 100 ], give_100 => [ 'withdraw', 100 ] }, @@ -3513,6 +3428,10 @@ print Person->meta
+

Questions?

+
+ +

Exercises

# cd exercises
@@ -3530,7 +3449,7 @@ Iterate til this passes all its tests

- Otherwise, jump to slide 268 ... + Otherwise, jump to slide 269 ...

@@ -3543,7 +3462,7 @@ Iterate til this passes all its tests @@ -3564,7 +3483,7 @@ Iterate til this passes all its tests

MooseX::Declare

use MooseX::Declare;
-use 5.10.0; # for say
+use 5.12.0; # for say
 
 class Person {
     has greeting =>
@@ -3583,7 +3502,7 @@ class Person {
     
  • Still experimental-ish, but seeing more and more use
    • 
     
  • Not a source filter!
    • 
     
  • Hooks into the Perl parser rather than filtering all your code
    • 
-    
  • But not supported by PPI, perltidy, etc.
    •  (yet?)
+    
  • But not supported by PPI, perltidy, etc. (yet?)
    • 
   
 
 
@@ -3756,7 +3675,7 @@ with HasCollection => { type => 'Int' };
  • mailing list - moose@perl.org
  • Slides and exercises are in Moose's git repo:
    - git://git.moose.perl.org/moose-presentations/moose.git
    • + git://git.moose.perl.org/moose-presentations.git