Book contents
- Frontmatter
- Contents
- FOREWORD
- PREFACE
- INTRODUCTION
- 1 A DIAGRAM FOR OBJECT-ORIENTED PROGRAMS
- 2 CONSTRUCTING ABSTRACTIONS FOR OBJECT-ORIENTED APPLICATIONS
- 3 PLAYRGOUND: AN OBJECT ORIENTED SIMULATION SYSTEM WITH AGENT RULES FOR CHILDREN OF ALL AGES
- 4 A LABORATORY FOR TEACHING OBJECT-ORIENTED THINKING
- 5 THINK LIKE AN OBJECT
- 6 WHY STUDY SMALLTALK IDIOMS?
- 7 THE DREADED SUPER
- 8 ABSTRACT CONTROL IDIOMS
- 9 VALUEMODEL IDIOMS
- 10 COLLECTION IDIOMS
- 11 AN OBJECTWORKS\SMALLTALK 4.1 WRAPPER IDIOM
- 12 A SHORT INTRODUCTION TO PATTERN LANGUAGE
- 13 WHOLE LOTTA SMALLTALK: THE TECHNOLOGY
- 14 INSTANCE-SPECIFIC BEHAVIOR: HOW AND WHY
- 15 INSTANCE-SPECIFIC BEHAVIOR: DIGITALK IMPLEMENTATION AND THE DEEPER MEANING OF IT ALL
- 16 TO ACCESSOR OR NOT TO ACCESSOR
- 17 INHERITANCE: THE REST OF THE STORY
- 18 INHERITANCE: THE REST OF THE STORY (CONT.)
- 19 HELPER METHODS AVOID UNWANTED INHERITANCE
- 20 IT'S NOT JUST THE CASE
- 21 CRC: FINDING OBJECTS THE EASY WAY
- 22 DEATH TO CASE STATEMENTS
- 23 WHERE DO OBJECTS COME FROM?
- 24 PATTERNS AND SOFTWARE DEVELOPMENT
- 25 DISTRIBUTED SMALLTALK
- 26 WHERE DO OBJECTS COME FROM? FROM VARIABLES AND METHODS
- 27 BIRDS, BEES, AND BROWSERS—OBVIOUS SOURCES OF OBJECTS
- 28 USING PATTERNS: DESIGN
- 29 PATTERNS GENERATE ARCHITECTURES
- 30 SIMPLE SMALLTALK TESTING
- 31 ARCHITECTURAL PROTOTYPE: TELEVISION REMOTE CONTROL
- 32 DEMAND LOADING FOR VISUALWORKS
- 33 GARBAGE COLLECTION REVEALED
- 34 WHAT? WHAT HAPPENED TO GARBAGE COLLECTION?
- 35 SUPER + 1
- 36 CLEAN CODE: PIPE DREAM OR STATE OF MIND?
- 37 A MODEST META PROPOSAL
- 38 USES OF VARIABLES: TEMPS
- 39 VARIABLES OF THE WORLD
- 40 PATTERNS 101
- 41 FAREWELL AND A WOOD PILE
- AFTERWORD
- INDEX
39 - VARIABLES OF THE WORLD
Smalltalk Report, November–December, 1995
Published online by Cambridge University Press: 04 August 2010
- Frontmatter
- Contents
- FOREWORD
- PREFACE
- INTRODUCTION
- 1 A DIAGRAM FOR OBJECT-ORIENTED PROGRAMS
- 2 CONSTRUCTING ABSTRACTIONS FOR OBJECT-ORIENTED APPLICATIONS
- 3 PLAYRGOUND: AN OBJECT ORIENTED SIMULATION SYSTEM WITH AGENT RULES FOR CHILDREN OF ALL AGES
- 4 A LABORATORY FOR TEACHING OBJECT-ORIENTED THINKING
- 5 THINK LIKE AN OBJECT
- 6 WHY STUDY SMALLTALK IDIOMS?
- 7 THE DREADED SUPER
- 8 ABSTRACT CONTROL IDIOMS
- 9 VALUEMODEL IDIOMS
- 10 COLLECTION IDIOMS
- 11 AN OBJECTWORKS\SMALLTALK 4.1 WRAPPER IDIOM
- 12 A SHORT INTRODUCTION TO PATTERN LANGUAGE
- 13 WHOLE LOTTA SMALLTALK: THE TECHNOLOGY
- 14 INSTANCE-SPECIFIC BEHAVIOR: HOW AND WHY
- 15 INSTANCE-SPECIFIC BEHAVIOR: DIGITALK IMPLEMENTATION AND THE DEEPER MEANING OF IT ALL
- 16 TO ACCESSOR OR NOT TO ACCESSOR
- 17 INHERITANCE: THE REST OF THE STORY
- 18 INHERITANCE: THE REST OF THE STORY (CONT.)
- 19 HELPER METHODS AVOID UNWANTED INHERITANCE
- 20 IT'S NOT JUST THE CASE
- 21 CRC: FINDING OBJECTS THE EASY WAY
- 22 DEATH TO CASE STATEMENTS
- 23 WHERE DO OBJECTS COME FROM?
- 24 PATTERNS AND SOFTWARE DEVELOPMENT
- 25 DISTRIBUTED SMALLTALK
- 26 WHERE DO OBJECTS COME FROM? FROM VARIABLES AND METHODS
- 27 BIRDS, BEES, AND BROWSERS—OBVIOUS SOURCES OF OBJECTS
- 28 USING PATTERNS: DESIGN
- 29 PATTERNS GENERATE ARCHITECTURES
- 30 SIMPLE SMALLTALK TESTING
- 31 ARCHITECTURAL PROTOTYPE: TELEVISION REMOTE CONTROL
- 32 DEMAND LOADING FOR VISUALWORKS
- 33 GARBAGE COLLECTION REVEALED
- 34 WHAT? WHAT HAPPENED TO GARBAGE COLLECTION?
- 35 SUPER + 1
- 36 CLEAN CODE: PIPE DREAM OR STATE OF MIND?
- 37 A MODEST META PROPOSAL
- 38 USES OF VARIABLES: TEMPS
- 39 VARIABLES OF THE WORLD
- 40 PATTERNS 101
- 41 FAREWELL AND A WOOD PILE
- AFTERWORD
- INDEX
Summary
This column takes a little bit bigger chance. I never worked out the instance variable taxonomy to the degree I did with temps, but I went ahead and published what I had anyway (as a column, it's not in the book), because I thought it was interesting and potentially useful. Looking at it now, I can't see how terribly useful it is. Sigh. Anyway, I was about to quit as columnist, and this and the previous column were just about rock bottom.
In the last issue, I presented the four ways temporary variables are commonly used. This time, I'll talk about how instance variables are used. The results for instance variables are nowhere near as tidy as those for temps. I'll speculate as to why after I've presented the information.
SOAPBOX
But first, I'd like to whine and complain a little. Here's the essence of my beef—it's getting harder, not easier, to write Smalltalk applications. This is not what I expected. Smalltalk had already raised the level of programming so much from what I was used to that I figured the trend would continue. Today's clichés would become tomorrow's abstractions and the day after that we would forget we ever had to program that stuff. Onward and upward.
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- Information
- Kent Beck's Guide to Better SmalltalkA Sorted Collection, pp. 371 - 378Publisher: Cambridge University PressPrint publication year: 1997