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December 22, 2024

Answer to Q2

 

The object returned is the string

'n ccnt'

The textual representation of this message answer is:

'n ccnt'

 

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» OU Courses

• M150 index
• M206 index
• T171 index

» Basic Smalltalk

• What is an object?
• Object protocol
• Objects and encapsulation
• Encapsulation continued
• Abstraction
• Reuse
• Object attributes
• The concept of class
• Class hierarchy and inheritance
• Variables
• Messages
• Assignment
• Methods
• Accessor messages
• Guide to using accessors
• The Artwork class
• The protocol of Artwork and its subclasses
• The instance methods of Artwork
• self
• Class methods
• Variable-reference diagrams
• Assignment exercise
• Object-interaction diagrams
• Textual representation (print-strings)
• Precedence rules
• The Dialog class
• Blocks
• Branching
• Boolean messages
• Conclusion

» Collections

• Introduction
• Set and Bag
• Set protocol
• Dictionary
• Dictionary protocol
• Array
• Array protocol
• Array scenario
• String protocol
• Symbol protocol
• OrderedCollection
• OrderedCollection protocol
• The exhibition collection
• SortedCollection
• The retrospective collection
• Queues
• Queue and BuyerQueue
• Iteration exercise

» Software Development

• Introduction
• Quad Gallery NSR p1
• Quad Gallery NSR p2
• Initial structural model
• Deriving Classes
• Deriving Associations
• What not to do
• Invariants
• Introduction to dynamic modelling
• Use case example
• Conclusion
• Class Diagram
• Class Descriptions

» Miscellaneous

• FAQ
• An essay on frogs and toads.
• Drawing with Word (Word doc 381Kb)
• Learning Works - Hints and tips (Word doc 35Kb)
• Basic Smalltalk (pdf 50Kb)
• M206 Smalltalk Hierarchy Diagram (Word doc 38Kb)
• Smalltalk Syntax
• Smalltalk Traps and Bugs (Word doc 71Kb)

» Smalltalk Exercises

• Textual representation and print-strings
• Precedence
• Boolean expressions
• Collections - 1
• Collections - 2