Computer science
Pharo By Example 5
Stéphane Ducasse, Dimitris Chloupis, Nicolai Hess, Dmitri Zagidulin
Square Bracket Associates / Pharo Books · Pharo 5 edition, 29 September 2018 · English · Published 2018
A practical introduction to the Pharo Smalltalk environment, object model, syntax, tools, testing and metaclasses.
- Learning stage
- College introduction
- Prerequisites
- Basic programming concepts; examples use the historical Pharo 5 environment.
- PDF pages
- 376 in this file
- Editorial review
- 2026-10-29
Contents
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Illustrations
Preface
Preface
What is Pharo?
Who should read this book?
A word of advice
An open book
The Pharo community
Examples and exercises
Acknowledgments
Hyper special acknowledgments
A quick tour of Pharo
A quick tour of Pharo
Installing Pharo
Pharo: File Components
Launching Pharo
Pharo Launcher
The World Menu
Sending Messages
Saving, Quitting and Restarting a Pharo Session
Playgrounds and Transcripts
Keyboard Shortcuts
The System Browser
Finding Classes
Finding Methods
Defining a New Method
Chapter Summary
A first application
A first application
The Lights Out game
Creating a new Package
Defining the class LOCell
Adding methods to a class
Inspecting an object
Defining the class LOGame
Organizing methods into protocols
Finishing the game
Let's try our code
Saving and sharing Pharo code
Chapter summary
Syntax in a nutshell
Syntax in a nutshell
Syntactic elements
Pseudo-variables
Message sends
Method syntax
Block syntax
Conditionals and loops in a nutshell
Primitives and pragmas
Chapter summary
Understanding message syntax
Understanding message syntax
Identifying messages
Three types of messages
Message composition
Hints for identifying keyword messages
Expression sequences
Cascaded messages
Chapter summary
The Pharo object model
The Pharo object model
The rules of the model
Everything is an Object
Every object is an instance of a class
Instance structure and behavior
The instance side and the class side
Every class has a superclass
Everything happens by sending messages
Method lookup follows the inheritance chain
Shared variables
Internal object implementation note
Chapter summary
Some of the key tools of the Pharo environment
Some of the key tools of the Pharo environment
Pharo environment overview
The main code browser
The inspector
The debugger
The process browser
Finding methods
Chapter summary
Sharing code and source control
Sharing code and source control
Packages: groups of classes and methods
Source control
The File List Browser
In Pharo, you can't lose code
Chapter summary
SUnit
SUnit
Introduction
Why testing is important
What makes a good test?
SUnit by example
The SUnit cookbook
The SUnit framework
Advanced features of SUnit
Continuing after a failure
SUnit implementation
A piece of advices on testing
Chapter summary
Basic classes
Basic classes
Object
Numbers
Characters
Strings
Booleans
Chapter summary
Collections
Introduction
The varieties of collections
Collection implementations
Examples of key classes
Collection iterators
Some hints for using collections
Chapter summary
Streams
Streams
Two sequences of elements
Streams vs. collections
Streaming over collections
Using streams for file access
Chapter summary
Morphic
Morphic
The history of Morphic
Manipulating morphs
Composing morphs
Creating and drawing your own morphs
Interaction and animation
Interactors
Drag-and-drop
A complete example
More about the canvas
Chapter summary
Seaside by example
Seaside by example
Why do we need Seaside?
Getting started
Seaside components
Rendering HTML
CSS: Cascading style sheets
Managing control flow
A complete tutorial example
A quick look at AJAX
Chapter summary
Reflection
Reflection
Introspection
Browsing code
Classes, method dictionaries and methods
Browsing environments
Accessing the run-time context
Intercepting messages not understood
Objects as method wrappers
Pragmas
Chapter summary
Regular expressions in Pharo
Regular expressions in Pharo
Tutorial example — generating a site map
Regex syntax
Regex API
Implementation Notes by Vassili Bykov
Chapter Summary
Classes and metaclasses
Classes and metaclasses
Rules for classes and metaclasses
Revisiting the Pharo object model
Every class is an instance of a metaclass
The metaclass hierarchy parallels the class hierarchy
Every metaclass inherits from Class and Behavior
Every metaclass is an instance of Metaclass
The metaclass of Metaclass is an instance of Metaclass
Chapter summary
Sources and permissions
The author and publisher remain the source of this textbook. Permission information applies to the specific files in this edition.
Author, publisher, and discovery sources
Authors: Stéphane Ducasse, Dimitris Chloupis, Nicolai Hess, Dmitri Zagidulin
Publisher: Square Bracket Associates / Pharo Books
- Discovered through Open Textbook Library: Source record · Checked 2026-10-26
- Discovered through Open Textbook Library: Source record · Checked 2026-10-25
CC BY-SA 3.0
Pharo By Example 5 by Stéphane Ducasse, Dimitris Chloupis, Nicolai Hess and Dmitri Zagidulin. © 2017; source edition dated 29 September 2018. CC BY-SA 3.0. Original PDF unchanged; layout credit to Damien Pollet retained.
Changes: Original PDF bytes are unchanged. Catalog metadata and page viewing are supplied by iReadAll. No endorsement implied. Structured extraction, audio, translation and independent image redistribution are not approved.
Checked 2026-10-29