Design Patterns Vol. 2

Our second volume of Design Patterns focuses on important variations on a classic object-oriented theme: how to best delegate or forward to cooperating objects, rather than using brute-force inheritance, to get things done. We explore a common theme in object-oriented design: favoring delegation over inheritance. The album draws from the Gang-of-Four's Structural and Behavioral patterns and uses them as a starting point.

Highlights

Instant Critiques: Take a refactoring exercise and get instant feedback from our automated band of experts. Learn more...

Delegation Patterns: Learn a collection of patterns that produce better designs by favoring delegation over inheritance. Learn more...

Expert Videos: Learn tools & techniques by watching short videos from industry experts. Learn more...

Integrated Forums: Ask questions, get expert replies and read fascinating discussions. Learn more...

Includes

4-6 hours of content
122 pages of content
4 Exercises
10 Quizzes
8 Patterns
12 Videos
Platform-independent code
Support for Visual Studio
Support for Eclipse CDT
Uses Google Test

Patterns and Collaboration

Inside Volume Two ← Click to Preview	3
The Duh Test	4
What's in a Name?	5

Composite: Performers, Groups and Soloists

Composite	7
Essence of the Composite Pattern ← Click to Preview	8
The One/Many Distinction	9
Refactoring A One/Many Distinction	10
Composite Players	11
JUnit: A Classic Composite	12
XML: A Natural Composite	13
Know Your Composites	14

Builder: Simplifying The Construction Process

Builder	16
Why Do We Love Builders?	17
Complicated, Repetitive and Verbose Composite Construction	18
`TagNode`: What Needs Improvement?	19
Which `TagBuilder` Is Better?	20
Understanding `TagBuilder`	21
Building Different Products Using Identical Construction Steps	22
Builder: The Players	23
Decoupling Construction Logic With A Builder	24
Builder Quiz	25

Interpreter: Data as Programs

Interpreter	27
Interpreter: The Essence	28
The Interpreter Pattern is Not About Parsing	29
Interpreter: The Players	30

Interpreter: Product Finder Exercise

Introduction ← Click to Preview	32
Search Expressions	33
Example Expression	34
Your Challenge	35
Problem Code	36
Critiquing Your Performance	37
Download and Setup Instructions	38
Upload Your Exercise	39
A Graph of Your Refactoring & Testing Activity	40
Your Critique Results	41
Your Customized Feedback	42
Solution	43
Lambda Solution	44

Interpreter: Spreadsheet Exercise

Expression Interpreter Problem	46
How to Construct Expressions	47
Test First	48
Extra Credit	49
Things to Test	50
Starter Code	51
Download and Setup Instructions	52
Expression Interpreter Solution	53
Pretty Printer Solution	54

Chain of Responsibility: Passing the Buck

Chain of Responsibility	56
Essence of the Chain of Responsibility	57
Tough Ticket	58
Mike to the Rescue	59
Meet Mike the Scalper ← Click to Preview	60
Mike's Supply Chain	61
The Buck Stops Here	62
The Players	63
What Could Go Wrong	64
Null Anchor Example	65

Null Object: Doing Nothing Well

Null Object	67
Too Many Null Checks!	68
Null Object To The Rescue!	69
When Is A Null Object Unnecessary?	70
Null Object Players ← Click to Preview	71
Much Ado About Nothing	72

Bridge: Pluggable Implementation

Bridge	74
Abstract Windowing Toolkit Example of Bridge	75
MFC Example of Bridge ← Click to Preview	76

Adapter: The Translators

Adapter	78
Adapter: The Essence	79
Adapter: The Players	80
Adapter Example	81
Two-Way Adapters	82
Adapter: The Quiz	83

Adapter: XML Exercise

In Need Of An Adapter ← Click to Preview	85
Choosing A Preferred Interface	86
Problem Source Code	87
Refactoring Guidance	88
Critiquing Your Performance	89
Download, Build & Test Instructions	90
Upload Your Exercise	91
A Graph of Your Refactoring & Testing Activity	92
Your Critique Results	93
Your Customized Feedback	94
Solution Video Step 1: Extract Interface ← Click to Preview	95
Solution Video Step 2: Extract Class	96
Solution Video Step 3: Move Method	97
Solution Video Step 4: Implement Interface	98
Solution Video Step 5: Pull Up Fields & Methods	99
Solution	100

Decorator: Changing Your Skin

Decorator	102
Bloated Objects	103
Avoiding Bloat	104
Decorator: The Players	105
How JUnit Avoided Featuritis	106
Patterns and Players Quiz	107

Proxy: The Surrogates

Proxy	109
Proxy: A Stand-In for Another Object	110
Proxy: The Players	111
Proxies Do Computational Chores	112
Chaining Proxies	113
Caching Proxy	114
Protection Proxy	115

Proxy: Finance Exercise

A Problem to Solve	117
Problem Source Code	118
Refactoring Guidance	119
Download, Build & Test Instructions	120
Solution Source Code	121
Alternative Solution Source Code	122

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