use moose talk in beijing workshop 2008

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Seeing is believingMouse

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Mooooooooooooooooose

[email protected]

November 08, 2008

[email protected] Mooooooooooooooooose

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IntroductionWhat’s Moose?

Seeing is believingLet’s Compare!Attributes - hasRoles - withMethod ModifiersOther Methods

MouseWhat’s Mouse?Why?Mouse is not enough in future?

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What’s Moose?

What Moose is not

I NOT a cow

I NOT contain any melamine

I NOT Perl 6

I NOT just a toy

I NOT a new object system


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What’s Moose?

Google knows something about Moose


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What’s Moose?

Interested in that animal?

Let’s talk about that animallater


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What’s Moose?

What Moose here really is

I an extension of the existing objectsystem of Perl 5

I very much inspired by Perl 6I built on top of Class::MOP(

Welcome to Meta world! )I postmodern( just like Perl ;)I ready to use


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What’s Moose?



I very much inspired by Perl 6

I built on top of Class::MOP(Welcome to Meta world! )

I postmodern( just like Perl ;)I ready to use


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What’s Moose?




Welcome to Meta world! )

I postmodern( just like Perl ;)I ready to use


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What’s Moose?




Welcome to Meta world! )I postmodern( just like Perl ;)

I ready to use


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What’s Moose?




Welcome to Meta world! )I postmodern( just like Perl ;)I ready to use


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What’s Moose?

Official Definition

Moose is a postmodern object systemfor Perl 5 that takes the tedium outof writing object-oriented Perl. Itborrows all the best features fromPerl 6, CLOS (LISP), Smalltalk, Java,BETA, OCaml, Ruby and more, whilestill keeping true to its Perl 5 roots.


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Let’s Compare!Attributes - hasRoles - withMethod ModifiersOther Methods

The Request


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What we normally OOP


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If we have Moose . . .


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You may point out. . .

You skipped use strict; and usewarnings; on purpose to reduce

lines!


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So, I’m telling you. . .

Well, I skipped those two linesbecause Moose does that for

me.


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Thanks, Moose!


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use ’has’ to install attributes

has $name|@$names => %options


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%options

I is ( ’ro|rw’ )

I isa ( type constraints )

I does ( $role )

I required ( 1|0 )

I default

I predicate ( method name to check for initialization )

I clearer ( method name to uninitialize )


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is

I ro

I rw


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is


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isa - type


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does - Role

Let’s talk about Roles later


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required


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default


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predicate and clearer


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Code Reuse

From S12: Classes are primarily incharge of object management, andonly secondarily in charge of softwarereuse. In Perl 6, roles take over thejob of managing software reuse.


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What’s a Role?

From S12: Depending on how youcare to look at it, a role is like apartial class, or an interface withdefault implementation, or a set ofgeneric methods and their associateddata, or a class closed at compiletime.


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use ’with’ to apply Roles


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I before

I after

I around


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I override/super

I augment/inner

I . . .


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an easy way to speed up Moose


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What’s Mouse?Why?Mouse is not enough in future?

Mouse is a lightweighted Moose. Itprovides a subset of Moose’sfunctionality.


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the compile time penalty

Though significant progress has beenmade over the years, the compiletime penalty is a non-starter for someapplications.


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It’s easy to do

s/Mouse/Moose/g;


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Less is better sometimes

I less code

I less tests

I less bugs


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So. . .

Let’s Moose from now on


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Until. . .

Perl 6 is finished


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More Info

I

http://www.iinteractive.com/moose

I #moose on irc.perl.org

I subscribe to [email protected]


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Thanks!

Any Questions?


use moose talk in beijing workshop 2008

Technology

end google

existing object system

objectoriented perl

perl ready

isan extension

toy nota new object

nota cow notcontain

mop welcome