X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=moose-class%2Fslides%2Findex.html;h=6e8415c7dadaff7ba8bdb2d8661bb3c394683371;hb=1a2103f568e2d2b2522685fe814263f63dce3223;hp=629a3ca2e8d8f04d1bb5e4c6b54874b6eaadeb91;hpb=4bb8a45d8b2379d4c9081e2552b9c29d24ed9514;p=gitmo%2Fmoose-presentations.git diff --git a/moose-class/slides/index.html b/moose-class/slides/index.html index 629a3ca..6e8415c 100644 --- a/moose-class/slides/index.html +++ b/moose-class/slides/index.html @@ -52,7 +52,17 @@ img#me05 {top: 43px;left: 36px;}

Introduction to Moose

-

git://git.moose.perl.org/moose-presentations.git

+

Dave Rolsky +

+ +
+

Introduce Yourselves

+ +
@@ -208,7 +218,7 @@ use Moose;
@@ -265,7 +275,7 @@ has weight => ( ); # kaboom -Person->new( weight => 'fat' ); +Person->new( weight => 'heavy' );
@@ -290,8 +300,8 @@ has blog_uri => ( handles => { 'blog_host' => 'host' }, ); -$person->blog_host; -# really calls $person->blog_uri->host +$person->blog_host; +# really calls $person->blog_uri->host
@@ -832,6 +842,16 @@ has last_name => ( );
+
+

More Why Moose?

+ + +
+

Part 1: Moose Classes

@@ -872,7 +892,7 @@ use Moose;

BUILDARGS

@@ -1106,7 +1127,7 @@ print $person->first_name; # Dave use Moose; # true -Person->can('extends'); +Person->can('extends'); + + +
+

Basic Attributes Summary

+ +
-

What is a Method Modifier

+

What Are Method Modifiers For?

@@ -2352,7 +2397,7 @@ after clear_password => sub { $self->$orig( $self->_munge_insert(@_) ); - $new_user->_assign_uri; + $new_user->_assign_uri; return $new_user; }; @@ -2416,6 +2461,7 @@ around run => sub { @@ -2558,11 +2604,10 @@ Item Undef Defined Value - Num - Int - Str - ClassName - RoleName + Str + Num + Int + ClassName @@ -2580,7 +2625,7 @@ Item CodeRef RegexpRef GlobRef - FileHandle + FileHandle Object @@ -2611,6 +2656,7 @@ undef @@ -2711,9 +2757,11 @@ has start_date => (

Subtype Shortcuts - class_type

use Moose::Util::TypeConstraints;
-class_type 'DateTime';
+class_type 'DateTime';
+ +
-subtype 'DateTime', +
subtype 'DateTime',
     as      'Object',
     where   { $_->isa('DateTime') },
     message { ... };
@@ -2723,9 +2771,11 @@ subtype 'DateTime',

Subtype Shortcuts - role_type

use Moose::Util::TypeConstraints;
-role_type 'Printable';
+role_type 'Printable';
+ +
-subtype 'Printable', +
subtype 'Printable',
     as      'Object',
     where
         { Moose::Util::does_role(
@@ -2737,9 +2787,11 @@ subtype 'Printable',
   
Subtype Shortcuts - duck_type

 
   
use Moose::Util::TypeConstraints;
-duck_type Car => qw( run break_down );
+duck_type Car => qw( run break_down );

 
-subtype 'Car',
+

+
+
subtype 'Car',
     as      'Object',
     where   { all { $_->can($_) }
               qw( run break_down ) },
@@ -2750,9 +2802,11 @@ subtype 'Car',
   
Subtype Shortcuts - enum

 
   
use Moose::Util::TypeConstraints;
-enum Color => qw( red blue green ) );
+enum Color => qw( red blue green ) );

+
+

 
-my %ok = map { $_ => 1 }
+
my %ok = map { $_ => 1 }
              qw( red blue green );
 
 subtype 'Color'
@@ -3013,7 +3067,7 @@ has transaction_history => (
   
    
     
  • Type names are exported functions, catches typos early
    • 
     
  • Types must be pre-declared
    • 
-    
  • Types are stored with namespaces internally, but externally are short
    • 
+    
  • Types are stored with namespaces internally, but you use short names
    • 
     
  • Import existing Moose types as functions from MooseX::Types::Moose
    • 
     
  • Still need string names for things like ArrayRef['Email::Address']
    • 
   

@@ -3026,7 +3080,7 @@ has transaction_history => (
     
  • Catches typos at compile time
    • 
     
  • Automatic namespacing
    • 
     
  • One more thing to install and learn
    • 
-    
  • Every name gets types twice (declared and then defined)
    • 
+    
  • Every name is typed twice (declared and then defined)
    • 
     
  • Still stuck with strings when referring to class or role names
    • 
     
  • Coercion gotcha from earlier still applies to types exported from MooseX::Types::Moose
    • 
   
@@ -3153,7 +3207,7 @@ $alice->friend($bob);
    
 
   
    after salary_level => {
     my $self = shift;
-    return unless @_;
+    return unless @_;
     $self->clear_salary;
 };
    
 
@@ -3165,11 +3219,22 @@ $alice->friend($bob);
    
 
   
    has salary_level => (
     is      => 'rw',
-    trigger => sub { $_[0]->clear_salary },
+    trigger =>
+        sub { $_[0]->clear_salary },
 );
    
 
 
 
    
+  
    Trigger Arguments
    
+
+  
      
+    
    • $self
      • 
+    
    • $new_value
      • 
+    
    • $old_value - if one exists
      • 
+  
    
+
    
+
+
    
   
    Delegation
    
 
   
      
@@ -3226,6 +3291,7 @@ has lungs => (
   
      Array Reference
      
 
   
        
+    
      • 1-to-1 mapping
        • 
     
      • Takes each method name and creates a simple delegation from the delegating class to the delegatee attribute
        • 
   
      
 
    
@@ -3318,11 +3384,31 @@ has history => (
   
      
     
    • Delegate to unblessed Perl types
      • 
     
    • Scalar, array or hash ref, etc
      • 
+    
    • Treat Perl types as objects
      • 
+    
    • Still uses handles
      • 
+    
    • Pretend that native Perl types have methods
      • 
+  
    
+
+
+
    
+  
    Native Delegation - Array(Ref)
    
+
+  
      
+    
    • Methods include:
+      
        
+        
      • push
        • 
+        
      • shift
        • 
+        
      • elements - returns all elements
        • 
+        
      • count
        • 
+        
      • is_empty
        • 
+        
      • quite a few more
        • 
+      
      
+    
      • 
   
    
 
    
 
 
    
-  
    Native Delegation - Array
    
+  
    Native Delegation - Array(Ref)
    
 
   
    package Person;
 use Moose;
@@ -3340,23 +3426,71 @@ has _favorite_numbers => (
 
    
 
 
    
-  
    Native Delegation - Counter
    
+  
    Native Delegation - Array(Ref)
    
+
+  
    my $person = Person->new();
+
+$person->add_favorite_number(7);
+$person->add_favorite_number(42);
+
+print "$_\n"
+    for $person->favorite_numbers;
+
+# 7
+# 42
    
+
    
+
+
    
+  
    Native Delegation
    
+
+  
      
+    
    • Native types are ...
+      
        
+        
      • Number - add, mul, ...
        • 
+        
      • String - append, chop, ...
        • 
+        
      • Counter - inc, dec, ...
        • 
+        
      • Bool - set, toggle, ...
        • 
+        
      • Hash - get, set, ...
        • 
+        
      • Array - already saw it
        • 
+        
      • Code - execute and execute_method
        • 
+      
      
+    
      • 
+  
    
+
    
+
+
    
+  
    Curried Delegation
    
+
+  
      
+    
    • A delegation with some preset arguments
      • 
+    
    • Works with object or Native delegation
      • 
+  
    
+
    
+
+
    
+  
    Curried Delegation
    
 
-  
    package Stack;
+  
    package Person;
 use Moose;
-has depth => (
-    traits   => [ 'Counter' ],
-    is       => 'ro',
-    isa      => 'Int',
-    default  => 0,
-    init_arg => undef,
-    handles  =>
-      { _inc_depth => 'inc',
-        _dec_depth => 'dec',
-      },
+has account => (
+    is      => 'ro',
+    isa     => 'BankAccount',
+    handles => {
+        receive_100 =>
+            [ 'deposit', 100 ]
+        give_100    =>
+            [ 'withdraw', 100 ]
+    },
 );
    
 
    
 
+
    
+  
    Curried Delegation
    
+
+  
    $person->receive_100;
+# really is
+$person->account->deposit(100);
    
+
    
 
 
    
   
    Traits and Metaclasses
    
@@ -3383,7 +3517,7 @@ has depth => (
   
    Traits and Metaclasses
    
 
   
      
-    
    • Can add/alter/remove attribute parameter (from has)
      • 
+    
    • Can add/alter/remove an attribute parameter (from has)
      • 
     
    • Can change behavior of created attribute
      • 
   
    
 
    
@@ -3464,9 +3598,200 @@ Iterate til this passes all its tests
    -

    Part 8: A Tour of MooseX

    +

    Part 8: A Brief Tour of MooseX

    +
    + +
    +

    Notable MX Modules on CPAN

    + +
      +
    • Not comprehensive
      • +
    • 152 MooseX distributions on CPAN as of 02/02/2010
      • +
    • Some of them are crap
      • +
    +
    + +
    +

    Already Mentioned Several

    + +
      +
    • MooseX::NonMoose - best solution for subclassing non-Moose parents
      • +
    • MooseX::Declare - real Perl 5 OO
      • +
    • MooseX::FollowPBP and MooseX::SemiAffordanceAccessor
      • +
    • MooseX::Params::Validate and MooseX::Method::Signatures
      • +
    • MooseX::Types
      • +
    +
    + +
    +

    MooseX::Declare

    + +
    use MooseX::Declare;
+use 5.10.0; # for say
+
+class Person {
+    has greeting =>
+        ( is => 'ro', isa => 'Str' );
+
+    method speak {
+        say $self->greeting;
+    }
+}
    +
    + +
    +

    MooseX::Declare

    + +
      +
    • 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?) +
    +
    + +
    +

    MooseX::StrictConstructor

    + +
      +
    • By default, unknown constructor arguments are ignored
      • +
    • MX::StrictConstructor turns these into an error
      • +
    +
    + +
    +

    MooseX::StrictConstructor

    + + 
    package Person;
+
+use Moose;
+use MooseX::StrictConstructor;
+
+has name => ( is => 'ro' );
+
+Person->new
+    ( nane => 'Ringo Shiina' ); # kaboom
    +
    + +
    +

    MooseX::Traits

    + +
      +
    • Combines object construction and role application
      • +
    • Makes it easy to create one-off customized objects
      • +
    +
    + +
    +

    MooseX::Traits

    + + 
    package MyApp::Thingy;
+use Moose;
+
+with 'MooseX::Traits';
+
+my $thing =
+    MyApp::Thingy->new_with_traits
+        ( traits => [ 'Foo', 'Bar' ],
+          size   => 42 );
    +
    + +
    +

    MooseX::Getopt

    + +
      +
    • Makes command-line interface programs easy!
      • +
    • Construct an object from CLI arguments
      • +
    +
    +

    MooseX::Getopt

    + + 
    package App::CLI;
+use Moose;
+
+with 'MooseX::Getopt';
+
+has file    =>
+    ( is => 'ro', required => 1 );
+has filters =>
+    ( is => 'ro', isa => 'ArrayRef[Str]' );
+
+sub run { ... }
    +
    + +
    +

    MooseX::Getopt

    + +
      +
    • Then call it like this:
      • +
    + +
    #!/usr/bin/perl
+
+use App::CLI;
+
+App::CLI->new_with_options()->run();
    + +
    $ myapp-cli \
+   --file foo \
+   --filters compress \
+   --filters sanitize
    +
    + +
    +

    MooseX::Clone

    + + 
    package Person;
+
+use Moose;
+with 'MooseX::Clone';
+
+my $person = Person->new;
+my $clone  = $person->clone;
    +
    + +
    +

    MooseX::NonMoose

    + +
      +
    • Highly recommended for subclassing non-Moose parents
      • +
    • Gets all the little annoying details right
      • +
    +
    + +
    +

    MooseX::Role::Parameterized

    + + 
    package HasCollection;
+use MooseX::Role::Parameterized;
+parameter type => ( isa     => 'Str',
+                    default => 'Item' );
+role {
+    my $p = shift;
+
+    my $type =
+        'ArrayRef[' . $p->type() . ']';
+    has collection =>
+        ( is  => 'ro',
+          isa => $type );
+};
    +
    + +
    +

    MooseX::Role::Parameterized

    + + 
    package Person;
+
+use Moose;
+with HasCollection => { type => 'Int' };
    +
    + +
    +

    Questions?

    +
    +

    Part 9: Writing Moose Extensions

    @@ -3485,7 +3810,7 @@ Iterate til this passes all its tests
  • mailing list - moose@perl.org
  • Slides and exercises are in Moose's git repo:
    - git://jules.scsys.co.uk/gitmo/moose-presentations
    • + git://jules.scsys.co.uk/gitmo/moose-presentations