X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=moose-class%2Fslides%2Findex.html;h=7df4bccfed376bb51a3a5ebb063384776b34ad03;hb=cbf2305bcc8357a9450403dc9b24ebdc48c10955;hp=9166a98b7a29c0501b22538a31bcf8422e2756d1;hpb=0b337459c15908dd8239aec71930c3e5877c9da7;p=gitmo%2Fmoose-presentations.git
diff --git a/moose-class/slides/index.html b/moose-class/slides/index.html
index 9166a98..7df4bcc 100644
--- a/moose-class/slides/index.html
+++ b/moose-class/slides/index.html
@@ -71,7 +71,8 @@ img#me05 {top: 43px;left: 36px;}
- Declarative OO sugar
- Introspectable
- - Extensible (MooseX::* on CPAN)
+ - Extensible (188 MooseX::* on CPAN)
+ - Community approved (1200+ downstream dependents on CPAN)
@@ -154,7 +155,7 @@ img#me05 {top: 43px;left: 36px;}
package Person;
use Moose;
-has first_name => ( is => 'rw' );
+has first_name => ( is => 'ro' );
@@ -892,8 +893,8 @@ use Moose;
BUILDARGS
- - Takes
@_
, returns a hash reference of attribute name/value pairs
- - Accepts a hash or hashref; throws otherwise
+ - Processes
new
's @_
, returns a hash reference of attribute name/value pairs
+ - Accepts a hash or hashref; errors otherwise
- Provide your own for other cases
- Always call
$class->SUPER::BUILDARGS(@_)
as a fallback!
@@ -967,6 +968,7 @@ sub BUILD {
- Technically it's a hash reference
- If you ever treat it as one you are doing it wrong!
+ - Moose probably provides a feature to do what you need
@@ -976,6 +978,7 @@ sub BUILD {
- Like
DESTROY
, but Moose makes sure all DEMOLISH
methods in a hierarchy are called
- Called in normal inheritance order, children to parents
+ - Never called by you, only by Perl itself
@@ -1039,6 +1042,7 @@ extends 'LWP';
override
is another method modifier
- An alternative to Perl's
SUPER::
+ - Declares your intent to override a method
@@ -1050,13 +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();
+};
@@ -1065,7 +1069,7 @@ use Moose;
- Mostly like
$self->SUPER::work(@_)
- But cannot change
@_
!
- - Binds the parent's method at compile time
+ - Binds the parent's method correctly at compile time
- Parent determined by checking
Child->meta()->superclasses()
@@ -1232,6 +1236,8 @@ use Moose;
# perl install-moose (if needed)
+## Read the instructions in t/01-classes.t
+
# perl bin/prove -lv t/01-classes.t
# edit lib/Person.pm and lib/Employee.pm
@@ -1303,23 +1309,25 @@ 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();
@@ -1336,7 +1344,9 @@ print $person->full_name
package Person;
use Moose;
-with 'Printable';
+
with 'Printable';
+
+sub as_string { $_[0]->first_name() }
@@ -1347,6 +1357,8 @@ use Moose;
with 'Printable';
+sub as_string { $_[0]->first_name() }
+
has has_been_printed => ( is => 'rw' );
sub print {
@@ -1525,7 +1537,7 @@ use Moose;
with 'HasSize';
-has size => ( is => 'ro' );
+has size => ( is => 'ro' );
@@ -1539,7 +1551,7 @@ requires 'size';
package Shirt;
use Moose;
-has size => ( is => 'ro' );
+has size => ( is => 'ro' );
with 'HasSize';
@@ -1561,9 +1573,9 @@ with 'HasSize';
package Comparison;
use Moose;
-has [ 'left', 'right' ] => (
- is => 'ro',
- does => 'Comparable',
+has [ 'left', 'right' ] => (
+ is => 'ro',
+ does => 'Comparable',
);
@@ -1652,8 +1664,6 @@ 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
@@ -1800,6 +1810,7 @@ use Moose;
has bank => (
is => 'rw',
+ # THIS WILL NOT WORK
default => Bank->new(
name => 'Spire FCU' ),
);
@@ -1860,7 +1871,7 @@ has bank => (
sub _build_bank {
my $self = shift;
return Bank->new(
- name => 'Spire FCU' );
+ name => 'Spire FCU' );
}
@@ -1927,7 +1938,7 @@ has shoe_size => (
has shoes => (
is => 'ro',
lazy => 1,
- builder => '_build_shoes',
+ builder => '_build_shoes',
);
sub _build_shoes {
@@ -2000,7 +2011,7 @@ has account => (
package Person;
use Moose;
-has shoe_size => (
+has shoe_size => (
is => 'ro',
init_arg => 'foot_size',
);
@@ -2018,7 +2029,7 @@ print $person->shoe_size;
package Person;
use Moose;
-has shoes => (
+has shoes => (
is => 'ro',
init_arg => undef,
);
@@ -2584,15 +2595,12 @@ Item
Bool
True
- 1
-924.1
-'true'
-{}
+ 1
False
0
-0.0
'0'
+''
undef
@@ -3018,9 +3026,9 @@ coerce ArrayOfInt
use MyApp::Types qw( ArrayOfInt );
-has transaction_history => (
- is => 'rw',
- isa => ArrayOfInt,
+has transaction_history => (
+ is => 'rw',
+ isa => ArrayOfInt,
);
@@ -3204,7 +3212,7 @@ $alice->friend($bob);
has lungs => (
is => 'ro',
- isa => 'Lungs',
+ isa => 'Lungs',
handles => [ 'inhale', 'exhale' ],
);
@@ -3565,7 +3573,7 @@ Iterate til this passes all its tests
- Not comprehensive
- - 152 MooseX distributions on CPAN as of 02/02/2010
+ - 177 MooseX distributions on CPAN as of 09/21/2010
- Some of them are crap