X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=moose-class%2Fslides%2Findex.html;h=b3f57f681376337f550f7a3624631f0a305fcc1c;hb=7f7e655a677ae4e66c2bf208a9898c796a12e779;hp=25bf289f4d5544023709644e812f4aeff3cee813;hpb=137185647395c7ce62b7db523ba3781bd9c6b777;p=gitmo%2Fmoose-presentations.git
diff --git a/moose-class/slides/index.html b/moose-class/slides/index.html
index 25bf289..b3f57f6 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
@@ -71,7 +71,7 @@ img#me05 {top: 43px;left: 36px;}
- Declarative OO sugar
- Introspectable
- - Extensible (188 MooseX::* on CPAN)
+ - Extensible (202 MooseX::* on CPAN)
- Community approved (1200+ downstream dependents on CPAN)
@@ -950,10 +950,10 @@ sub BUILD {
Object Construction a la Moose
-
Person->new(@_)
+
Person->new(@args)
- - Calls
Person->BUILDARGS(@_)
to turn @_
into a hashref
+ - Calls
Person->BUILDARGS(@args)
to turn @args
into a hashref
- Blesses a reference
- Populates attributes based on the hashref from #1
- Calls
$new_object->BUILDALL($constructor_args)
@@ -1032,7 +1032,7 @@ extends 'LWP';
- No
DEMOLISH()
- - But see
MooseX::NonMoose
for a workaround
+ - But
MooseX::NonMoose
fixes all of this
@@ -1155,8 +1155,8 @@ Person->can('extends');
Cleaning Up Moose Droppings
package Person;
-use namespace::autoclean;
use Moose;
+use namespace::autoclean;
...
@@ -1344,7 +1344,9 @@ $person->print();
package Person;
use Moose;
-with 'Printable';
+with 'Printable';
+
+sub as_string { $_[0]->first_name() }
@@ -1355,6 +1357,8 @@ use Moose;
with 'Printable';
+sub as_string { $_[0]->first_name() }
+
has has_been_printed => ( is => 'rw' );
sub print {
@@ -1483,34 +1487,6 @@ 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';
-
-
- SysadminAssassin
must implement its own execute
- - But loading the
Killer
role by itself does not cause an error
-
-
-
-
Roles as Interfaces
@@ -1660,8 +1636,6 @@ requires 'compare';
Real Examples
- - Column and ColumnAlias both do ColumnLike
- - ColumnLike things can be used in certain parts of queries
- All queries do HasWhereClause
- Select does Comparable and Selectable (for subselects)
- A where clause requires its components to do Comparable
@@ -1723,6 +1697,15 @@ has 'is_ripped' => ( is => 'rw' );
+
Read-only vs Read-write
+
+
+ - Read-only is preferred
+ - Minimize state in your application
+
+
+
+
Required-ness
@@ -1808,6 +1791,7 @@ use Moose;
has bank => (
is => 'rw',
+ # THIS WILL NOT WORK
default => Bank->new(
name => 'Spire FCU' ),
);
@@ -1830,22 +1814,6 @@ has packages => (
-
What if I Want to Share?
-
-
package Person;
-use Moose;
-
-my $highlander_bank =
- Bank->new(
- name => 'Clan MacLeod Trust' );
-
-has bank => (
- is => 'rw',
- default => sub { $highlander_bank },
-);
-
-
-
Builder
@@ -2050,15 +2018,7 @@ Person->new( shoes => Shoes->new );
- By default, subclasses inherit attribute as-is
- - Can change some attribute parameters in subclasses
-
- - default
- - builder
- - required
- - lazy
- - others we've not yet covered
-
-
+ - Can change attribute parameters in subclasses
@@ -2411,62 +2371,6 @@ around run => sub {
-
Augment and Inner
-
-
- - Inverted
super
- - From least- to most-specific
- - Like Mason's autohandler feature
- - Grandparent to parent to child
- - Not allowed in roles
-
-
-
-
-
Augment and Inner
-
-
package Document;
-
-sub xml { '<doc>' . inner() . '</doc>' }
-
-package Report;
-extends 'Document';
-augment xml =>
- sub { my $self = shift;
- $self->title() . inner() . $self->summary() };
-
-package TPSReport;
-extends 'Report';
-augment xml =>
- sub { my $self = shift;
- $self->tps_xml() . inner() };
-
-
-
-
Augment and Inner
-
-
- - When we call
$tps->xml
...
-
- Document->xml
- Report->xml
- TPSReport->xml
-
-
-
-
-
-
-
Augment and Inner Usage
-
-
- - Call
inner()
to "fill in the blank"
- - Requires designing for subclassing
- - Call
inner()
in the terminal class, just in case
-
-
-
-
Method Modifiers Summary
@@ -2492,21 +2396,7 @@ extends 'Report';
- not call the original method at all (or call a different method)
-
-
-
-
-
Method Modifiers Summary
-
-
- When using modifiers in a role, require the modified method
- - Use
augment
and inner
to invert the normal subclassing flow ...
-
- - Least- to most-specific (parents to children)
- - Build in "insertability" (stick more stuff in the "middle")
-
-
- - Always call
inner
in the most specific subclass to allow for future extension
@@ -2726,7 +2616,7 @@ class_type 'DateTime';
Subtype Shortcuts - role_type
use Moose::Util::TypeConstraints;
-role_type 'Printable';
+role_type 'Printable';
@@ -2835,7 +2725,8 @@ coerce 'My::DateTime',
Coercion Examples
-
coerce 'ArrayRef[Int]',
+ # BAD CODE - DO NOT COPY
+coerce 'ArrayRef[Int]',
from 'Int',
via { [ $_ ] };
@@ -2933,7 +2824,7 @@ 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
@@ -3373,7 +3264,6 @@ has history => (
use Moose;
has _favorite_numbers => (
traits => [ 'Array' ],
- is => 'bare',
isa => 'ArrayRef[Int]',
default => sub { [] },
init_arg => undef,
@@ -3436,7 +3326,7 @@ has account => (
isa => 'BankAccount',
handles => {
receive_100 =>
- [ 'deposit', 100 ]
+ [ 'deposit', 100 ],
give_100 =>
[ 'withdraw', 100 ]
},
@@ -3540,6 +3430,10 @@ print Person->meta
+
Questions?
+
+
+
Exercises
# cd exercises
@@ -3570,7 +3464,7 @@ Iterate til this passes all its tests
- Not comprehensive
- - 177 MooseX distributions on CPAN as of 09/21/2010
+ - 188 MooseX distributions on CPAN as of 02/03/2011
- Some of them are crap
@@ -3591,7 +3485,7 @@ 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 =>
@@ -3610,7 +3504,7 @@ 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?)
@@ -3783,7 +3677,7 @@ with HasCollection => { type => 'Int' };
mailing list - moose@perl.org
Slides and exercises are in Moose's git repo:
- git://jules.scsys.co.uk/gitmo/moose-presentations
+ git://git.moose.perl.org/moose-presentations.git