27 Iterating over Data

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	Designing Programs with Class
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	Preface
I	Basic Design with Objects
2	Objects = Data + Function
3	Classes of Objects: Data Definitions
4	Classes of Objects: Interface Definitions
5	Pac Man
6	Parameterized Data and Interfaces
7	Solidifying what we’ve done
VIII	Abstraction with Objects
9	Abstraction via Delegation
10	Abstraction via Inheritance
XI	Invariants
12	Invariants, Testing, and Abstraction Barriers
XIII	Schemes of a Larger Design
14	Larger system design: Snakes on a plane
15	Universe
16	Guess my number
17	Visitors and Folds
XVIII	Mutation
19	Ch-Ch-Ch-Ch-Changes
20	Circular Data
21	Back-channels
22	Intensional equality
XXIII	Java
24	Java
25	???
26	Extensional Equality in Java
27	Iterating over Data
XXVIII	A Class of Your Own
29	Under the Hood: Implementing OO
XXX	Solutions
31	Solutions
	Index