This is an introduction for Moose in beijing perl workshop 2008 on 08 Nov.

1. Outline
Introduction
Seeing is believing
Mouse
The End
Mooooooooooooooooose
sunnavy@bestpractical.com
November 08, 2008
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2. Outline
Introduction
Seeing is believing
Mouse
The End
Introduction
What’s Moose?
Seeing is believing
Let’s Compare!
Attributes - has
Roles - with
Method Modifiers
Other Methods
Mouse
What’s Mouse?
Why?
Mouse is not enough in future?
The End
sunnavy@bestpractical.com Mooooooooooooooooose

3. Outline
Introduction
Seeing is believing What’s Moose?
Mouse
The End
What Moose is not
NOT a cow
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4. Outline
Introduction
Seeing is believing What’s Moose?
Mouse
The End
What Moose is not
NOT a cow
NOT contain any melamine
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5. Outline
Introduction
Seeing is believing What’s Moose?
Mouse
The End
What Moose is not
NOT a cow
NOT contain any melamine
NOT Perl 6
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6. Outline
Introduction
Seeing is believing What’s Moose?
Mouse
The End
What Moose is not
NOT a cow
NOT contain any melamine
NOT Perl 6
NOT just a toy
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7. Outline
Introduction
Seeing is believing What’s Moose?
Mouse
The End
What Moose is not
NOT a cow
NOT contain any melamine
NOT Perl 6
NOT just a toy
NOT a new object system
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8. Outline
Introduction
Seeing is believing What’s Moose?
Mouse
The End
Google knows something about Moose
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9. Outline
Introduction
Seeing is believing What’s Moose?
Mouse
The End
Interested in that animal?
Let’s talk about that animal
later
sunnavy@bestpractical.com Mooooooooooooooooose

10. Outline
Introduction
Seeing is believing What’s Moose?
Mouse
The End
What Moose here really is
an extension of the existing object
system of Perl 5
sunnavy@bestpractical.com Mooooooooooooooooose

11. Outline
Introduction
Seeing is believing What’s Moose?
Mouse
The End
What Moose here really is
an extension of the existing object
system of Perl 5
very much inspired by Perl 6
sunnavy@bestpractical.com Mooooooooooooooooose

12. Outline
Introduction
Seeing is believing What’s Moose?
Mouse
The End
What Moose here really is
an extension of the existing object
system of Perl 5
very much inspired by Perl 6
built on top of Class::MOP(
Welcome to Meta world! )
sunnavy@bestpractical.com Mooooooooooooooooose

13. Outline
Introduction
Seeing is believing What’s Moose?
Mouse
The End
What Moose here really is
an extension of the existing object
system of Perl 5
very much inspired by Perl 6
built on top of Class::MOP(
Welcome to Meta world! )
postmodern( just like Perl ;)
sunnavy@bestpractical.com Mooooooooooooooooose

14. Outline
Introduction
Seeing is believing What’s Moose?
Mouse
The End
What Moose here really is
an extension of the existing object
system of Perl 5
very much inspired by Perl 6
built on top of Class::MOP(
Welcome to Meta world! )
postmodern( just like Perl ;)
ready to use
sunnavy@bestpractical.com Mooooooooooooooooose

15. Outline
Introduction
Seeing is believing What’s Moose?
Mouse
The End
Official Definition
Moose is a postmodern object system
for Perl 5 that takes the tedium out
of writing object-oriented Perl. It
borrows all the best features from
Perl 6, CLOS (LISP), Smalltalk, Java,
BETA, OCaml, Ruby and more, while
still keeping true to its Perl 5 roots.
sunnavy@bestpractical.com Mooooooooooooooooose

16. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
The Request
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17. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
What we normally OOP
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18. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
If we have Moose . . .
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19. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
You may point out. . .
You skipped use strict; and use
warnings; on purpose to reduce
lines!
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20. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
So, I’m telling you. . .
Well, I skipped those two lines
because Moose does that for
me.
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21. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
Thanks, Moose!
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22. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
use ’has’ to install attributes
has $name|@$names => %options
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23. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
%options
is ( ’ro|rw’ )
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24. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
%options
is ( ’ro|rw’ )
isa ( type constraints )
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25. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
%options
is ( ’ro|rw’ )
isa ( type constraints )
does ( $role )
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26. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
%options
is ( ’ro|rw’ )
isa ( type constraints )
does ( $role )
required ( 1|0 )
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27. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
%options
is ( ’ro|rw’ )
isa ( type constraints )
does ( $role )
required ( 1|0 )
default
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28. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
%options
is ( ’ro|rw’ )
isa ( type constraints )
does ( $role )
required ( 1|0 )
default
predicate ( method name to check for initialization )
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29. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
%options
is ( ’ro|rw’ )
isa ( type constraints )
does ( $role )
required ( 1|0 )
default
predicate ( method name to check for initialization )
clearer ( method name to uninitialize )
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30. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
is
ro
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31. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
is
ro
rw
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32. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
is
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33. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
isa - type
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34. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
isa - type
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35. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
does - Role
Let’s talk about Roles later
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36. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
required
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37. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
default
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38. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
predicate and clearer
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39. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
Code Reuse
From S12: Classes are primarily in
charge of object management, and
only secondarily in charge of software
reuse. In Perl 6, roles take over the
job of managing software reuse.
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40. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
What’s a Role?
From S12: Depending on how you
care to look at it, a role is like a
partial class, or an interface with
default implementation, or a set of
generic methods and their associated
data, or a class closed at compile
time.
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41. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
use ’with’ to apply Roles
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42. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
before
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43. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
before
after
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44. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
before
after
around
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45. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
sunnavy@bestpractical.com Mooooooooooooooooose

46. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
sunnavy@bestpractical.com Mooooooooooooooooose

47. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
override/super
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48. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
override/super
augment/inner
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49. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
override/super
augment/inner
...
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50. Outline Let’s Compare!
Introduction Attributes - has
Seeing is believing Roles - with
Mouse Method Modifiers
The End Other Methods
an easy way to speed up Moose
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51. Outline
Introduction What’s Mouse?
Seeing is believing Why?
Mouse Mouse is not enough in future?
The End
Mouse is a lightweighted Moose. It
provides a subset of Moose’s
functionality.
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52. Outline
Introduction What’s Mouse?
Seeing is believing Why?
Mouse Mouse is not enough in future?
The End
the compile time penalty
Though significant progress has been
made over the years, the compile
time penalty is a non-starter for some
applications.
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53. Outline
Introduction What’s Mouse?
Seeing is believing Why?
Mouse Mouse is not enough in future?
The End
It’s easy to do
s/Mouse/Moose/g;
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54. Outline
Introduction
Seeing is believing
Mouse
The End
Less is better sometimes
less code
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55. Outline
Introduction
Seeing is believing
Mouse
The End
Less is better sometimes
less code
less tests
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56. Outline
Introduction
Seeing is believing
Mouse
The End
Less is better sometimes
less code
less tests
less bugs
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57. Outline
Introduction
Seeing is believing
Mouse
The End
So. . .
Let’s Moose from now on
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58. Outline
Introduction
Seeing is believing
Mouse
The End
Until. . .
Perl 6 is finished
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59. Outline
Introduction
Seeing is believing
Mouse
The End
More Info
http://www.iinteractive.com/moose
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60. Outline
Introduction
Seeing is believing
Mouse
The End
More Info
http://www.iinteractive.com/moose
#moose on irc.perl.org
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61. Outline
Introduction
Seeing is believing
Mouse
The End
More Info
http://www.iinteractive.com/moose
#moose on irc.perl.org
subscribe to moose@perl.org
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62. Outline
Introduction
Seeing is believing
Mouse
The End
Thanks!
Any Questions?
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