</div>
<div class="slide">
+ <h1>Introduce Yourselves</h1>
+
+ <ul>
+ <li>Your name</li>
+ <li>What you do with Perl</li>
+ <li>Why you're here today (optional)</li>
+ </ul>
+</div>
+
+<div class="slide">
<h1>Moose Summed Up</h1>
<ul>
);
# kaboom
-Person->new( weight => 'fat' );</code></pre>
+Person->new( weight => 'heavy' );</code></pre>
</div>
<div class="slide">
);</code></pre>
</div>
+<div class="slide">
+ <h1>More Why Moose?</h1>
+
+ <ul>
+ <li>Less code == fewer bugs</li>
+ <li>Moose is well-tested, test your own code, not Moose</li>
+ <li>Focus on <strong>what</strong>, not <strong>how</strong></li>
+ </ul>
+</div>
+
<div class="slide fake-slide0">
<h1>Part 1: Moose Classes</h1>
</div>
<h1>BUILDARGS</h1>
<ul>
- <li>Takes <code>@_</code>, returns a hash reference of attribute names/value</li>
+ <li>Takes <code>@_</code>, returns a hash reference of attribute name/value pairs</li>
<li>Accepts a hash or hashref; throws otherwise</li>
<li>Provide your own for other cases</li>
<li><strong>Always</strong> call <code>$class->SUPER::BUILDARGS(@_)</code> as a fallback!</li>
<pre><code>Person->new(@_)</code></pre>
- <ol>
+ <ol style="margin-top: 0">
<li>Calls <code>Person->BUILDARGS(@_)</code> to turn <code>@_</code> into a hashref</li>
<li>Blesses a reference</li>
<li>Populates attributes based on the hashref from #1</li>
<ul>
<li><code>extends</code> is sugar for declaring parent classes</li>
+ <li>Also ensures metaclass compatibility between parent and child</li>
+ <li>Do not <code>use base</code></li>
</ul>
<pre><code>package Employee;
<h1>Modifier Order</h1>
<ul>
- <li>Before runs order from last to first</li>
+ <li>Before runs in order from last to first</li>
<li>After runs in order from first to last</li>
<li>Around runs in order from last to first</li>
</ul>
Undef
Defined
Value
- Num
- Int
Str
+ Num
+ Int
ClassName
RoleName
</pre>
<pre>
(Item)
(Defined)
+ (Value)
Ref
ScalarRef
ArrayRef[`a]
<ul>
<li><code>Value</code> is true when <code>! ref $thing</code></li>
<li><code>Value</code> and <code>Str</code> are effectively the same, but <code>Str</code> is more expressive</li>
+ <li><code>Num</code> is true when a <code>$scalar</code> looks like a number</li>
<li>An overloaded object which numifies does not pass the <code>Num</code> constraint!</li>
<li>Perl 5's overloading is hopelessly broken</li>
</ul>
via { [ $_ ] };</code></pre>
<ul>
- <li>Coerce instead of a union like <code style="white-space: nowrap">Int | ArrayRef[Int]</code></li>
+ <li>Instead of union - <code style="white-space: nowrap">Int | ArrayRef[Int]</code></li>
</ul>
</div>
\@_,
tasks =>
{ isa => 'ArrayRef[Task]',
- coerce =>1 },
+ coerce => 1 },
can_rest =>
{ isa => 'Bool',
default => 0 },
<ul>
<li>Delegate to <em>unblessed</em> Perl types</li>
<li>Scalar, array or hash ref, etc</li>
+ <li>Treat Perl types as objects</li>
+ <li>Still uses <code>handles</code></li>
+ <li>Pretend that native Perl types have methods</li>
</ul>
</div>
<div class="slide">
- <h1>Native Delegation - Array</h1>
+ <h1>Native Delegation - Array(Ref)</h1>
+
+ <ul>
+ <li>Methods include:
+ <ul>
+ <li><code>push</code></li>
+ <li><code>shift</code></li>
+ <li><code>elements</code> - returns all elements</li>
+ <li><code>count</code></li>
+ <li><code>is_empty</code></li>
+ <li>quite a few more</li>
+ </ul>
+ </li>
+ </ul>
+</div>
+
+<div class="slide">
+ <h1>Native Delegation - Array(Ref)</h1>
<pre><code>package Person;
use Moose;
</div>
<div class="slide">
- <h1>Native Delegation - Counter</h1>
+ <h1>Native Delegation - Array(Ref)</h1>
+
+ <pre><code>my $person = Person->new();
+
+$person->add_favorite_number(7);
+$person->add_favorite_number(42);
- <pre><code>package Stack;
+print "$_\n"
+ for $person->favorite_numbers;
+
+# 7
+# 42</code></pre>
+</div>
+
+<div class="slide">
+ <h1>Native Delegation</h1>
+
+ <ul>
+ <li>Native types are ...
+ <ul>
+ <li>Number - <code>add</code>, <code>mul</code>, ...</li>
+ <li>String - <code>append</code>, <code>chop</code>, ...</li>
+ <li>Counter - <code>inc</code>, <code>dec</code>, ...</li>
+ <li>Bool - <code>set</code>, <code>toggle</code>, ...</li>
+ <li>Hash - <code>get</code>, <code>set</code>, ...</li>
+ <li>Array - already saw it</li>
+ <li>Code - <code>execute</code>, that's it</li>
+ </ul>
+ </li>
+ </ul>
+</div>
+
+<div class="slide">
+ <h1>Curried Delegation</h1>
+
+ <ul>
+ <li>A delegation with some preset arguments</li>
+ <li>Works with object or Native delegation</li>
+ </ul>
+</div>
+
+<div class="slide">
+ <h1>Curried Delegation</h1>
+
+ <pre><code>package Person;
use Moose;
-has depth => (
- traits => [ 'Counter' ],
- is => 'ro',
- isa => 'Int',
- default => 0,
- init_arg => undef,
- <span class="highlight">handles =>
- { _inc_depth => 'inc',
- _dec_depth => 'dec',
- },</span>
+has account => (
+ is => 'ro',
+ isa => 'BankAccount',
+ handles => {
+ receive_100 =>
+ <span class="highlight">[ 'deposit', 100 ]</span>
+ give_100 =>
+ <span class="highlight">[ 'withdraw', 100 ]</span>
+ },
);</code></pre>
</div>
+<div class="slide">
+ <h1>Curried Delegation</h1>
+
+ <pre><code>$person->receive_100;
+# really is
+$person->account->deposit(100);</code></pre>
+</div>
<div class="slide">
<h1>Traits and Metaclasses</h1>
</div>
<div class="slide fake-slide0">
- <h1>Part 8: A Tour of MooseX</h1>
+ <h1>Part 8: A Brief Tour of MooseX</h1>
+</div>
+
+<div class="slide">
+ <h1>Notable MX Modules on CPAN</h1>
+
+ <ul>
+ <li><strong>Not comprehensive</strong></li>
+ <li>128 MooseX distributions on CPAN as of 09/24/2009</li>
+ <li>Some of them are crap</li>
+ </ul>
+</div>
+
+<div class="slide">
+ <h1>Already Mentioned Several</h1>
+
+ <ul>
+ <li><code>MooseX::NonMoose</code> - best solution for subclassing non-Moose parents</li>
+ <li><code>MooseX::Declare</code> - <em>real</em> Perl 5 OO</li>
+ <li><code>MooseX::FollowPBP</code> and <code>MooseX::SemiAffordanceAccessor</code></li>
+ <li><code>MooseX::Params::Validate</code> and <code>MooseX::Method::Signatures</code></li>
+ <li><code>MooseX::Types</code></li>
+ </ul>
+</div>
+
+<div class="slide">
+ <h1>MooseX::Declare</h1>
+
+<pre><code>use MooseX::Declare;
+use 5.10.0; # for say
+
+class Person {
+ has greeting =>
+ ( is => 'ro', isa => 'Str' );
+
+ method speak {
+ say $self->greeting;
+ }
+}</code></pre>
+</div>
+
+<div class="slide">
+ <h1>MooseX::Declare</h1>
+
+ <ul>
+ <li>Still experimental-ish, but seeing more and more use</li>
+ <li><strong>Not</strong> a source filter!</li>
+ <li>Hooks into the Perl parser rather than filtering all your code</li>
+ <li>But not supported by <code>PPI</code>, <code>perltidy</code>, etc.</li> (yet?)
+ </ul>
</div>
+<div class="slide">
+ <h1>MooseX::StrictConstructor</h1>
+
+ <ul>
+ <li>By default, unknown constructor arguments are ignored</li>
+ <li>MX::StrictConstructor turns these into an error</li>
+ </ul>
+</div>
+
+<div class="slide">
+ <h1>MooseX::StrictConstructor</h1>
+
+ <pre><code>package Person;
+
+use Moose;
+<span class="highlight">use MooseX::StrictConstructor;</span>
+
+has name => ( is => 'ro' );
+
+Person->new
+ ( na<span class="wrong">n</span>e => 'Ringo Shiina' ); # kaboom</code></pre>
+</div>
+
+<div class="slide">
+ <h1>MooseX::Traits</h1>
+
+ <ul>
+ <li>Combines object construction and role application</li>
+ <li>Makes it easy to create one-off customized objects</li>
+ </ul>
+</div>
+
+<div class="slide">
+ <h1>MooseX::Traits</h1>
+
+ <pre><code>package MyApp::Thingy;
+use Moose;
+
+<span class="highlight">with 'MooseX::Traits';</span>
+
+my $thing =
+ MyApp::Thingy-><span class="highlight">new_with_traits</span>
+ ( <span class="highlight">traits => [ 'Foo', 'Bar' ],</span>
+ size => 42 );</code></pre>
+</div>
+
+<div class="slide">
+ <h1>MooseX::Getopt</h1>
+
+ <ul>
+ <li>Makes command-line interface programs easy!</li>
+ <li>Construct an object from CLI arguments</li>
+ </ul>
+</div>
+
+<div class="slide">
+ <h1>MooseX::Getopt</h1>
+
+ <pre><code>package App::CLI;
+use Moose;
+
+<span class="highlight">with 'MooseX::Getopt';</span>
+
+has file =>
+ ( is => 'ro', required => 1 );
+has filters =>
+ ( is => 'ro', isa => 'Str' );
+
+sub run { ... }</code></pre>
+</div>
+
+<div class="slide">
+ <h1>MooseX::Getopt</h1>
+
+ <ul>
+ <li>Then call it like this:</li>
+ </ul>
+
+<pre><code>#!/usr/bin/perl
+
+use App::CLI;
+
+<span class="highlight">App::CLI->new_with_options()</span>->run();</code></pre>
+
+<pre>$ myapp-cli \
+ --file foo \
+ --filters compress \
+ --filters sanitize</pre>
+</div>
+
+<div class="slide">
+ <h1>MooseX::Clone</h1>
+
+ <pre><code>package Person;
+
+use Moose;
+<span class="highlight">with 'MooseX::Clone';</span>
+
+my $person = Person->new;
+my $clone = <span class="highlight">$person->clone;</span></code></pre>
+</div>
+
+<div class="slide">
+ <h1>MooseX::NonMoose</h1>
+
+ <ul>
+ <li>Highly recommended for subclassing non-Moose parents</li>
+ <li>Gets all the little annoying details right</li>
+ </ul>
+</div>
+
+<div class="slide">
+ <h1>MooseX::Role::Parameterized</h1>
+
+ <pre><code>package HasCollection;
+<span class="current incremental">use MooseX::Role::Parameterized;</span>
+<span class="incremental">parameter type => ( isa => 'Str',
+ default => 'Item' );</span>
+<span class="incremental">role {
+ my $p = shift;
+
+ my $type =
+ 'ArrayRef[' . $p->type() . ']';
+ has collection =>
+ ( is => 'ro',
+ isa => $type );
+};</span></code></pre>
+</div>
+
+<div class="slide">
+ <h1>MooseX::Role::Parameterized</h1>
+
+ <pre><code>package Person;
+
+use Moose;
+with HasCollection => { type => 'Int' };</code></pre>
+</div>
+
+<div class="slide">
+ <h1>Questions?</h1>
+</div>
+
<div class="slide fake-slide0">
<h1>Part 9: Writing Moose Extensions</h1>
</div>
projects / gitmo/moose-presentations.git / blobdiff