Smalltalk introduction - InriaPharo's goal is to deliver a clean, innovative, free open-source...
Transcript of Smalltalk introduction - InriaPharo's goal is to deliver a clean, innovative, free open-source...
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Smalltalk introduction
RMod
I n g . m a r i a n o m a r t i n e z p e c km a r i a n o p e c k @ g m a i l . c o m
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Acknowledgements
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Engineering
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"I always knew that one day Smalltalk would replace Java. I just didn't know it would be called Ruby."
-- Kent Beck
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Smalltalk’s inventions
Virtual Machine.
Mouse.
IDE concept and windows management.
A large part of the OOP.
Garbage collector.
UnitTesting.
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But it also has...
Web Frameworks.
Desktop applications (native and own).
Different types of databases.
Several dialects.
IDE and development tools.
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Characteristics
Pure object oriented.
Invented in the 70’s (maduration).
Dynamically typed.
Virtual Machine.
Image based language.
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Pure object oriented
Everything is an object (classes, methods, messages, loops).
There are no primitive types.
There is no special syntax.
Only 5 reserved words: nil, true, false, self and super.
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Packages
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Packages
Classes
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Packages
Classes Categories
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Packages
Classes Categories Methods
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Packages
Classes Categories Methods
Method source code
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Advantages
PFC (programmer happiness coefficient).
Productive.
Efficient.
Flexible.
Powerful.
Everything looks easier.
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Disadvantages
It is not mainstream.
Difficult to “sell”.
Difficult to show confidence to the client.
Not so many developed libraries.
Less documentation.
Expensive (those which are not OS).
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open-source dialects
Pharo/Squeak
GNU Smalltalk
Smalltalk X
Otros
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Paid dialects
VisualWorks
VisualAge
Gemstone
Dolphin
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http://www.pharo-project.org
A clean, innovative, open-source Smalltalk
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Pharo's goal is to deliver a clean, innovative, free open-source Smalltalk environment. By providing a stable and small core system, excellent developer tools and maintained releases, Pharo is an attractive platform to build and deploy mission critical Smalltalk applications.
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architecture
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Pharo?
We use our language every day
Teaching
Researc
h
Busin
ess
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Pharo
A flexible environment to support the innovation in/of Smalltalk.
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Pharo
A robust environment to support doing business in Smalltalk.
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Showcase
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Pier
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Pier
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Smalltalk with OO-Database
Pharo is the IDE
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Pinesoft MBagger
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iPhone
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Everybody can help
Reporting bugsConfirming bugsWriting testsWriting examplesWriting commentsSimple contributing fixesDeep discussion...
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Open Pharo SprintsMay 2008 BernJuly 2009 BernOctober 2009 LilleNovember 2009 Buenos AiresMarch 2010 BernMay 2010 Buenos AiresJune 2010 BernJune 2010 BruxellesJuly 2010 LondonSeptember 2010 BarcelonaSeptember 2010 LilleNovember 2010 Buenos Aires
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Books
Pharo by example vol. 1 is out
Pharo by example vol. 2 is on preparation
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Join us!
Creating good energy, software quality,
learning and having fun
http://pharo-project.org
Sunday, November 21, 2010