Smalltalk and Object Orientation: an Introduction - Free

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21.6 Summary In this chapter we explored the concepts of frameworks and patterns as a method o f documenting frameworks. We have briefly considered what we mean by frameworks and how frameworks can be developed. We then discussed what a pattern is and how they may be used to document a framework. Following on from this an extended tutorial describin g how the framework HotDraw can be used to develop a simple drawing tool called BoxDraw. This tutorial example was presented in the manner of a very (simplified) pattern. 180
Part Four Testing and Style 181
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Smalltalk and Object Orientation: A
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Chapter 7: Smalltalk Constructs Thi
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The user interface construction fac
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Preface 1. INTRODUCTION TO OBJECT O
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12.5 A CLASS SIDE METHOD...........
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27.3 VISUALWORKS WINDOW PAINTING TO
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Part One Introduction to Object Ori
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interfaces between different parts
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een to ease the transition from one
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encapsulation. Attempting to introd
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is a controversial subject which is
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will become second nature to many o
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or return something. It has since b
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defining the behavior of different
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In time most developers start to ac
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2.4.3.4 Smalltalk environments are
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3. Constructing an Object Oriented
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Wash wipe switch Wiper motor Relay
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Point 2 above is more complicated.
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services working? working? working?
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Part Two The Smalltalk Language 42
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other systems. As the browsers, ins
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VisualAge (a version of Smalltalk w
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4.5.2 The VisualWorks Launcher and
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Class categories. These are group s
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5. A Little Smalltalk 5.1 Introduct
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Notifiers can be displayed under a
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These concepts of messages, receive
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Select the “Debug” option. This
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6. Smalltalk Building Blocks 6.1 In
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6.3.1 Class definitions In Smalltal
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Object Class1 Class 2 method search
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“Now calculate y “ y := x * 23.
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7. Smalltalk Constructs 7.1 Introdu
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They are more efficient for storage
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7.5.3 true, false and nil variables
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anArray at: 1 max: 10. This will tr
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Figure 8.1: Defining a new class 8.
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this convention at the moment, howe
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9. Control and Iteration 9.1 Introd
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9.3.3 Block temporary variables Blo
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The brackets round the 1 to: 10 are
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OrderedCollection class (respective
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holding other objects. Typically, c
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| temp | temp := Set new. temp add:
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Next we will define a message proto
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11. Further Collection Classes 11.1
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for (i = 0; i
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x inspect. This has some similariti
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11.9.3 The reject: message The reje
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• asSortedCollection. This create
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Figure 12.2: The Organizer class de
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12.6 The private-updating protocol
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do: [:item | Transcript show: item
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13. Streams and Files 13.1 Introduc
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Notice that in this example we used
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to reconstruct the data into object
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1. The ability to save the current
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14.3 The class Date Class Date, a s
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aCharacter isAlphabetic. aCharacter
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Breakpoints may be placed in a me t
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If the file does not exist you will
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Figure 15.4: Creating a project To
Page 129 and 130: Part Three Object Oriented Design 1
Page 131 and 132: 16. Object Oriented Analysis and De
Page 133 and 134: devolved amongst the objects). This
Page 135 and 136: driving force behind the whole of t
Page 137 and 138: 17. The Unified Modeling Language 1
Page 139 and 140: Deployment diagrams . Deployment di
Page 141 and 142: Window abstract +size : Area = (10,
Page 143 and 144: Micro Computer 1.. * Monitor System
Page 145 and 146: connectedTo * Lamp * Weight Sensor
Page 147 and 148: 18. UML: Dynamic Modeling And Deplo
Page 149 and 150: edisplay() Controller window A Wind
Page 151 and 152: 18.2.3.1 A start point A start poin
Page 153 and 154: etween nodes and their stereotype.
Page 155 and 156: OMT is a prescriptive method, it pr
Page 157 and 158: confirming the users’ needs, thei
Page 159 and 160: 19.3.2.2 Prepare a data dictionary
Page 161 and 162: car, truck and bus under a supercla
Page 163 and 164: 20.2.1.3 Prepare sequence and colla
Page 165 and 166: 20.2.2.5 Specify optimization crite
Page 167 and 168: are therefore concurrent and can be
Page 169 and 170: 20.3.2.3 Design optimization The an
Page 171 and 172: 21. Frameworks and Patterns for Obj
Page 173 and 174: As the framework takes shape you sh
Page 175 and 176: about a set of classes, than to att
Page 177 and 178: instanceVariableNames: '' classVari
Page 179: 21.5.5 Running the editor You have
Page 183 and 184: made worse, because the symbol held
Page 185 and 186: 22.3.2 Incremental testing Incremen
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Page 189 and 190: 22.7.2 The Perform: message The per
Page 191 and 192: From the scenario that a person mig
Page 193 and 194: 23.4 Self testing An approach, sugg
Page 195 and 196: 24. Smalltalk Style Guidelines 24.1
Page 197 and 198: 24.2.4 Adding variables to system c
Page 199 and 200: should use a dictionary to hold the
Page 201 and 202: • A method should only send messa
Page 203 and 204: Table 24.2: Class message categorie
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Page 207 and 208: • Inheritance (class to class rel
Page 209 and 210: You can find the methods which impl
Page 211 and 212: These messages are sent automatical
Page 213 and 214: 26. The Model-View-Controller Archi
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Page 217 and 218: Figure 26.5: Part of the Controller
Page 219 and 220: model 4. update 1. balance (view) 0
Page 221 and 222: displayed. The second component add
Page 223 and 224: 27. Graphical User Interface Constr
Page 225 and 226: 27.3.1 Palette The Palette tool pro
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Edit button, then the user interfac
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27.11 Visual reuse The aim of visua
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Figure 27.17: Defining the parent c
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important, as these facilities hand
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28.3 The AddressBook class 28.3.1 T
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The aspect methods can then be simp
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the name is in the address book, it
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29.2 The custom view widget 29.2.1
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DrawingView model SmallDraw drawing
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The action of adding a new graphic
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The next method we shall consider i
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In the updating protocol we need to
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The displaying protocol contains th
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30. Memory Management and Garbage C
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30.3.3 PermSpace This is used to ho
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31. Concurrency in Smalltalk 31.1 I
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The Semaphore class provides facili
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Once the process wakes up it can de
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31.4.3 Acknowledgments Acknowledgme
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“There are two kinds of objects i
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Object Object class Collection Coll
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ehavior, but from the point of view
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32.5.5 The whole enchilada Behaviou
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33. The Future for Object Technolog
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solutions are needed which suit the
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scripting and query language to use
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34. Appendix: The Smalltalk Languag
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A capitalization convention is used
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• marries: is the message selecto
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Array OrderedCollection SortedColle
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[Coleman et al 1994] D. Coleman, P.
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OOPSLA/ECOOP’90, Joint Conference
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detect.............................
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True...............................
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