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<div id="footer">
<div id="license">
- <a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/us/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-sa/3.0/us/88x31.png" /></a>
+ <a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/us/"><img alt="Creative Commons License" style="border-width:0" src="ui/creative-commons.png" /></a>
<br /><span xmlns:dc="http://purl.org/dc/elements/1.1/" href="http://purl.org/dc/dcmitype/Text" property="dc:title" rel="dc:type">Introduction to Moose</span> by <span xmlns:cc="http://creativecommons.org/ns#" property="cc:attributionName">David Rolsky</span> is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/us/">Creative Commons Attribution-Share Alike 3.0 United States License</a>.
</div>
<li>
Attributes have ...
<ul>
- <li>Access-control (read-only vs read-write)</li>
+ <li>Mutability (read-only vs read-write)</li>
<li>An optional type</li>
<li>Accessor methods</li>
<li>Delegation methods</li>
my @return =
$self->$real_foo( @_, bar => 42 );
- return ( @return, 'modify return values' );
+ return (
+ @return,
+ 'modify return values'
+ );
};</code></pre>
</div>
has blog_uri => (
is => 'rw',
isa => 'URI',
- <span class="highlight">handles => { 'blog_hostname' => 'host' },</span>
+ <span class="highlight">handles => { 'blog_host' => 'host' },</span>
);
- <span class="highlight">$person->blog_hostname;</span>
+ <span class="highlight">$person->blog_host;</span>
# really calls $person->blog_uri->host</code></pre>
</div>
<ul>
<li>Moose creates <code>new()</code> for you</li>
- <li>Provide an optional <code>BUILDARGS()</code> and <code>BUILD()</code></li>
+ <li>Provide an optional <code>BUIDARGS()</code> and <code>BUILD()</code></li>
</ul>
</div>
if ( @_ == 1 && ! ref $_[0] ) {
<span class="highlight">return { ssn => $_[0] };</span>
}
-
<span class="highlight">return $class->SUPER::BUILDARGS(@_)</span>;
}
<span class="incremental">override</span> work => sub {
my $self = shift;
- die "Pay me first" unless $self->got_paid;
+ die "Pay me first"
+ unless $self->got_paid;
<span class="incremental">super();</span>
}<span class="incremental">;</span></code></pre>
</div>
<ul>
<li><code>no Moose</code> at the end of a package is a best practice</li>
- <li>Or <code>namespace::clean</code> at the top</li>
+ <li>Or <code>use namespace::autoclean</code> at the top</li>
<li>Just do it</li>
</ul>
</div>
# perl bin/prove -lv t/01-classes.t
+# edit lib/Person.pm and lib/Employee.pm
+
Iterate til this passes all its tests</pre>
</div>
</div>
<div class="slide">
- <h1>Roles Can Have State <strong>and</strong> Behavior</h1>
+ <h1>Roles - State <strong>and</strong> Behavior</h1>
<pre><code>package HasPermissions;
use Moose::Role;
-
<span class="current incremental"># state
has access_level => ( is => 'rw' );</span>
my $self = shift;
my $required = shift;
- return $self->access_level >= $required;
+ return $self->access_level
+ >= $required;
}</span></code></pre>
</div>
<h1>Classes Consume Roles</h1>
<pre><code>my $person = Person->new(
- first_name => 'Kenichi',
- last_name => 'Asai',
+ first_name => 'Kenichi',
+ last_name => 'Asai',
access_level => 42,
);
# or ...
- if ( Person->meta->does('Printable') ) { ... }</code></pre>
+ Person->meta->does('Printable')</code></pre>
</div>
use Moose;
<span class="highlight">with 'IsFragile' =>
- { alias =>
+ { -alias =>
{ break => 'break_bone' } },
'CanBreakdance' =>
- { alias =>
+ { -alias =>
{ break => 'break_it_down' } };</span></code></pre>
<ul>
use Moose;
<span class="highlight">with 'IsFragile' =>
- { alias =>
+ { -alias =>
{ break => 'break_bone' },
- exclude => 'break' },
+ -excludes => 'break' },
'CanBreakdance' =>
- { alias =>
+ { -alias =>
{ break => 'break_dance' },
- exclude => 'break' };</span></code></pre>
+ -excludes => 'break' };</span></code></pre>
</div>
<div class="slide">
<pre><code>use Moose::Util qw( apply_all_roles );
my $fragile_person = Person->new( ... );
- apply_all_roles( $fragile_person, 'IsFragile' );</code></pre>
+ apply_all_roles( $fragile_person,
+ 'IsFragile' );</code></pre>
<ul>
<li>Does not change the <code>Person</code> class</li>
</div>
<div class="slide">
- <h1>Default as a Subroutine Reference</h1>
+ <h1>Subroutine Reference Default</h1>
<ul>
<li>Called as a method on the object</li>
sub _build_bank {
my $self = shift;
- return Bank->new( name => 'Spire FCU' );
+ return Bank->new(
+ name => 'Spire FCU' );
}</code></pre>
</div>
</div>
<div class="slide">
- <h1>Lazy, Good for Nothing Attributes</h1>
+ <h1>Lazy, Good for Nothin' Attributes</h1>
<ul>
<li>Normally, defaults are generated during object construction</li>
<h1>Exercises</h1>
<pre># 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</pre>
</div>
my $self = shift;
return unless $DEBUG;
- warn "Called work on ", $self->full_name,
+ warn "Called work on ",
+ $self->full_name,
"with the arguments: [@_]\n";
};</code></pre>
</div>
</div>
<div class="slide">
- <h1>Other Uses Example</h1>
+ <h1>More Modifier Examples</h1>
<pre><code>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;
$self->_munge_insert(@_) );
$new_user->_assign_uri;
-
return $new_user;
};</code></pre>
</div>
package Report;
extends 'Document';
-
<span class="highlight">augment xml</span> =>
sub { title() . <span class="highlight">inner()</span> . summary() };
package TPSReport;
extends 'Report';
-
<span class="highlight">augment xml</span> =>
sub { tps_xml() . <span class="highlight">inner()</span> };</code></pre>
</div>
<h1>Exercises</h1>
<pre># 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</pre>
</div>
<span class="incremental current">subtype 'PositiveInt',</span>
<span class="incremental">as 'Int',</span>
<span class="incremental">where { $_ > 0 },</span>
- <span class="incremental">message { "The value you provided ($_)"
- . " was not a positive number." };</span>
+ <span class="incremental">message
+ { "The value you provided ($_)"
+ . " was not a positive int." };</span>
has size => (
is => 'ro',
<pre><code>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 { $ok{$_} },
subtype 'UCStr',
as 'Str',
- where { ! /[a-z]/ };
+ where { ! /[a-z]/ };</code></pre>
+ </div>
+
+ <div class="slide">
+ <h1>Coercions</h1>
- <span class="incremental current">coerce 'UCStr',</span>
+ <pre><code><span class="incremental current">coerce 'UCStr',</span>
<span class="incremental">from 'Str',</span>
<span class="incremental">via { uc };</span>
<pre><code>package Person;
- use Moose::Util::TypeConstraints;
-
has height => (
is => 'rw',
<span class="highlight">isa => 'Num',</span>
{ isa => 'Bool',
default => 0 },
);</span>
-
...
}</code></pre>
</div>
<h1>Namespace Fix</h1>
<pre><code>use Moose::Util::TypeConstraints;
-
subtype <span class="highlight">'MyApp::Type::DateTime',</span>
as 'DateTime';
use Moose;
has name => ( is => 'ro' );
- has friend => ( is => 'rw', <span class="highlight">weak_ref => 1</span> );
+ has friend => ( is => 'rw',
+ <span class="highlight">weak_ref => 1</span> );
my $alice = Person->new( name => 'Alice' );
my $bob = Person->new( name => 'Bob' );
<pre><code>package Person;
use Moose;
-
has account => (
is => 'ro',
isa => 'BankAccount',
<pre><code>package Auditor;
use Moose::Role;
-
sub record_change { ... }
sub change_history { ... }
<pre><code>package Person;
use Moose;
-
has _favorite_numbers => (
traits => [ 'Array' ],
is => 'ro',
add_favorite_number => 'push',
},</span>
);</code></pre>
-
- <ul>
- <li>Automatically defaults to <code>[]</code></li>
- </ul>
</div>
<div class="slide">
<pre><code>package Stack;
use Moose;
-
has depth => (
traits => [ 'Counter' ],
is => 'ro',
isa => 'Str',
<span class="highlight">label => 'Social Security Number',</span>
);
-
print <span class="highlight">Person->meta
->get_attribute('ssn')->label;</span></code></pre>
</div>
isa => 'Str',
<span class="highlight">label => 'Social Security Number',</span>
);
-
print <span class="highlight">Person->meta
->get_attribute('ssn')->label;</span></code></pre>
</div>
<h1>Exercises</h1>
<pre># 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</pre>
</div>
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