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CHAPTER 1 ■ REPRESENTING DATA WITH VALUES 18 "Mission to Marzipan" ]; iceCream["7"]; // "Cinnamon Buns" Verify your work with Figure 1–13. Figure 1–13. Querying an element with a string rather than with a number Similarly, we could query a member in an equivalent object literal with a number. Try it in Firebug, verifying your work with Figure 1–14: var iceCream = { "0": "Chocolate Fudge Brownie", "1": "Half Baked", "2": "New York Super Fudge Chunk", "3": "Coffee Heath Bar Crunch", "4": "Cherry Garcia", "5": "Mud Pie", "6": "Milk & Cookies", "7": "Cinnamon Buns", "8": "Chocolate Chip Cookie Dough", "9": "Mission to Marzipan" }; iceCream[5]; // "Mud Pie"
Figure 1–14. Objects may have elements, too. CHAPTER 1 ■ REPRESENTING DATA WITH VALUES In Chapter 5, we’ll explore some array-only features for manipulating elements. Those make elements in array magical compared to those in an object. It’s sort of like how putting on the spidey suit turns ordinary Peter Parker into Spiderman. Creating a Function Literal Alright, it’s trivial to query our ice cream array for what flavor I’d rank eighth: var iceCream = [ "Chocolate Fudge Brownie", "Half Baked", "New York Super Fudge Chunk", "Coffee Heath Bar Crunch", "Cherry Garcia", "Mud Pie", "Milk & Cookies", "Cinnamon Buns", "Chocolate Chip Cookie Dough", "Mission to Marzipan" ]; iceCream[7]; // "Cinnamon Buns" But it’s quite another to query whether a flavor like "Cinnamon Buns" is among my top ten, as the following sample and Figure 1–15 illustrate: var iceCream = [ "Chocolate Fudge Brownie", "Half Baked", "New York Super Fudge Chunk", "Coffee Heath Bar Crunch", "Cherry Garcia", 19
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Page 4 and 5: ii JavaScript for Absolute Beginner
Page 6 and 7: iv Contents at a Glance ■Contents
Page 8 and 9: ■ CONTENTS vi ■Chapter 2: Type
Page 10 and 11: ■ CONTENTS viii Sharing a Prototy
Page 12 and 13: ■ CONTENTS x Querying Attributes
Page 14 and 15: ■ CONTENTS xii Getting the User
Page 16 and 17: ■ CONTENTS xiv About the Technica
Page 18 and 19: ■ PREFACE xvi Preface In the 2005
Page 20 and 21: ■ PREFACE xviii Opening Firebug L
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CHAPTER 6 ■ FUNCTIONS AND ARRAYS
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CHAPTER 7 ■ TRAVERSING AND MODIFY
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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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