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CHAPTER 4 ■ CONTROLLING FLOW 110 break; case 83: name = "Miller"; break; case 86: name = "Ward"; break; case 92: name = "Harrison"; break; case 94: name = "Timmons"; break; case 96: name = "Hood"; break; default: name = "not worn by any Steeler"; break; } "Number " + jersey + " is " + name + "."; // "Number 1 is not worn by any Steeler." Since there is no case clause for 1, JavaScript ran the default path. Note that, although the default case typically goes last, that is not something JavaScript requires. So let’s put it first instead: var jersey = 1, name = ""; switch (jersey) { default: name = "not worn by any Steeler"; break; case 7: name = "Roethlisberger"; break; case 10: name = "Holmes"; break; case 17: name = "Wallace"; break; case 34: name = "Mendenhall"; break; case 43: name = "Polamalu"; break; case 83: name = "Miller"; break; case 86: name = "Ward"; break; case 92: name = "Harrison";
CHAPTER 4 ■ CONTROLLING FLOW break; case 94: name = "Timmons"; break; case 96: name = "Hood"; break; } "Number " + jersey + " is " + name + "."; // "Number 1 is not worn by any Steeler." It works just as well there. Now, as I noted earlier, case clauses can have more than one case expression. This provides a way for you to run a path for more than one string or number. For example, numbers 92 and 97 on the Steelers are both named Harrison, so let’s kill two birds with one stone like this: var jersey = 92, name = ""; switch (jersey) { case 7: name = "Roethlisberger"; break; case 10: name = "Holmes"; break; case 17: name = "Wallace"; break; case 34: name = "Mendenhall"; break; case 43: name = "Polamalu"; break; case 83: name = "Miller"; break; case 86: name = "Ward"; break; case 92: case 97: name = "Harrison"; break; case 94: name = "Timmons"; break; case 96: name = "Hood"; break; default: name = "not worn by any Steeler"; break; } "Number " + jersey + " is " + name + "."; 111
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THE EXPERT’S VOICE ® IN WEB DEVE
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ii JavaScript for Absolute Beginner
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iv Contents at a Glance ■Contents
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■ CONTENTS vi ■Chapter 2: Type
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■ CONTENTS viii Sharing a Prototy
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■ CONTENTS x Querying Attributes
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■ CONTENTS xii Getting the User
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■ CONTENTS xiv About the Technica
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■ PREFACE xvi Preface In the 2005
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■ PREFACE xviii Opening Firebug L
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■ PREFACE xx Now press Return on
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■ PREFACE xxii editor reappear. N
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■ PREFACE xxiv
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CHAPTER 1 ■ REPRESENTING DATA WIT
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CHAPTER 2 ■ TYPE CONVERSION 26 Fi
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CHAPTER 2 ■ TYPE CONVERSION 30 St
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CHAPTER 2 ■ TYPE CONVERSION 32 De
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CHAPTER 2 ■ TYPE CONVERSION 38
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CHAPTER 2 ■ TYPE CONVERSION 50 Co
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CHAPTER 2 ■ TYPE CONVERSION 54 To
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CHAPTER 3 ■ OPERATORS 58 Remember
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CHAPTER 5 ■ MEMBER INHERITANCE 16
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CHAPTER 6 ■ FUNCTIONS AND ARRAYS
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CHAPTER 7 ■ TRAVERSING AND MODIFY
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CHAPTER 8 ■ SCRIPTING CSS 308 Rem
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CHAPTER 8 ■ SCRIPTING CSS 310 var
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CHAPTER 8 ■ SCRIPTING CSS 312 tex
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CHAPTER 8 ■ SCRIPTING CSS 336 Why
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CHAPTER 8 ■ SCRIPTING CSS 346
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CHAPTER 9 ■ LISTENING FOR EVENTS
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■ INDEX 462 parsing an XML respon
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■ INDEX 464 creating, 217 queryin
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■ INDEX 466 document.styleSheets,
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■ INDEX 468 listening for mousedo
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■ INDEX 470 chaining prototypes,
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■ INDEX 472 definition of, 255 de
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■ INDEX 474 ■ P padJSON(), 445
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■ INDEX 476 ten.js, 401 ternary o
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