Reported Errors in
	An Introduction to Object-Oriented Programming (3nd Ed)
	by Timothy A. Budd
	(Last modified )

Short Errors

The following lists errors that can be easily described. In some cases the table refers to more lengthy explanations that follow. Positive line numbers count from the top of page, negative numbers from the bottom.

Chapter	Page, Line	Explanation	Reporter
2	28, 4	proving a service=>providing a service	(an)
3	49, -8	poliferation => proliferation	(jl)
3	70, 8	I are not => I am not	(sk)
4	80, -18	suit => suitValue rank => rankValue	(ps)
4	84, -15	suit should be suit()	(ps)
4	97,-1	repeated sentence. repeated sentence.	(rz)
5	108, 7	caret should be up-arrow
6	142	Curly braces in Smalltalk code (see note below)
7	153	Direct Manipulation of Ball (see note below)	(rg)
8	185, 13	langauges=>languages	(al)
9	187, -5	writen=>written	(al)
9	197, -3	add if (! topCard.isFaceUp) return false;	(jd)
9	205, 6	solitare=>solitaire	(al)
10	259, 3	If return type is void, why is it returning a value?	(bp)
12	245, 7	deep Copy, wrong font, two words (should match line above)	(nm)
12	250, -11	langauges=>languages	(al)
15	288, 5	Previous definition (page 113) didn't include return type	(jl)
15	305	Curly braces in Smalltalk code (see note below)
15	307	Question 12, What=>How	(al)
16	314	Curly braces in Smalltalk code (see note below)
16	318	middle of page, anAchor.printAnchor()=>anAnchor.printAnchor()	(nm)
16	318	http= quote marks have migrated to wrong place	(js)
16	321,13	caret should be up arrow
16	325	Change Class Labels (see below)
16	325,4	effect of changing=>effect of changing the type of a	(rz)
17	340	Curly braces in Smalltalk code (see note below)
17	337, 5	layoutManager => LayoutManager	(bp)
18	353,9, 13	B.firstValue => collection.firstValue, similarly nextValue	(dc)
19	374, -9	saw in Chapter 17=>saw in Chapter 18	(nm)
21	410, 8	Description does not match code	(en)
21	410,17	parameter data=>v	(dc)
21	422, -8	question 4, first sentence, not a question?
21	422, -7	should be ``permit *a different style of reuse*..*than*	(en)
24	469	Curly braces in Smalltalk code (see note below)
25	480,2	typeinfo => type_info	(dc)
25	481,14	typeinfo => typeid	(dc)
25	487, 7	facilities also exit=>also exist	(zh)
27	513,3,19	card=>cards	(sk)
A	541	Curly braces in Smalltalk code (see note below)
Glos	572	Def of co and contrvariance backwards	(rz)
Index	601	co/contrvariance should point to 324	(rz)

Longer Explanations of Errors

Chapter 1, Exercise 1

I've found I've needed to add an extra sentence to exercise 1 in chapter 1. Students otherwise tend to toss is random ideas and call it a hierarchy. Add the sentence ``Explain what relation links the various levels in your non-inheritance hierarchy''.

Curly Braces in Smalltalk Code (Pages 142, 305, 314, 315, 316)

In some places curly braces appear in the Smalltalk code headings. This is a remnant of some typesetting macros that were used in the production. The text between the curly brackets should be presented in bold, and the curly braces themselves omitted.

Direct Manipulation of Ball (Page 153)

After carefully saying in earlier chapters that one object should not directly modify the data fields in another, I then blythly rush ahead and have holes and balls modify the state of other balls. (Insert the sound of a hand being slapped here). I should have used functions to mediate this change.

Covariance and Contravariance (Page 325)

It has been suggested that the two hierarchies (Parent/Child and Animal/Cat) in the discussion on page 325 is confusing. This could be mitagated by changing the labels on the picture near the top of page 325 to be something like ``Parent (e.g. Mammal)'' and ``Child (e.g. Cat)''.

Acknowledgements

(dc)

Dave Conklin, student at Oregon State University

(jd)

John Dalbey, Lecturer in computer science at Cal Poly.

(rg)

Robert Grim, Intel corporation.

(zh)

Zachary Heath, Student at Oregon State University.

(sk)

Stephen Ko, Student at Oregon State University.

(al)

Amanda Leegard (aka Tim Dogg), MS student at Oregon State University.

(nm)

Neville Mehta, MS student at Oregon State University.

(jl)

Chuan Che ("Jacob") Lee, PhD student at Oregon State University

(an)

Ansuya Negi, MS student at Portland State University.

(en)

Eriko Nurvitadhi, MS student at Oregon State University.

(bp)

Ben Pflaum, Student at Oregon State University

(js)

Jeremy Smith, Rogue Wave, Corvallis, Oregon.

(ps)

Peter Squires, Comp Eng student at Concordia University

(rz)

Rick Zaccone, Department of Computer Science, Bucknell University.

Reporting Errors

Report all errors to me at budd@cs.orst.edu
Tim Budd, Associate Professor of Computer Science
Oregon State University
Corvallis, Oregon 97330