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High Performance JavaScript 英文无水印原版pdf pdf所有页面使用FoxitReader、PDF-XChangeViewer、SumatraPDF和Firefox测试都可以打开 本资源转载自网络,如有侵权,请联系上传者或csdn删除 查看此书详细信息请在美国亚马逊官网搜索此书
High Performance JavaScript High Performance JavaScript Nicholas c. zakas ORE|LLY° Beijing· ambridge: Farnham. KoIn. Sebastopol· Taipei· Tokyo High Performance JavaScript by nicholas C. Zakas Copyright@ 2010 Yahoo!, Inc. All rights reserved Printed in the United States of america Published by O Reilly Media, Inc, 1005 Gravenstein Highway North, Sebastopol, CA 95472 O'Reilly books may be purchased for educational, business, or sales promotional use. Online editions arealsoavailableformosttitles(http://my.safaribooksonline.com).Formoreinformationcontactour corporate/institutionalsalesdepartment:(800)998-9938orcorporate@oreilly.com Editor: Mary e. treseler Indexer: Fred Brown Production editor: Adam zaremba Cover designer Karen montgomery Copyeditor: Genevieve d'Entremont Interior Designer: David Futato Proofreader: Adam zaremba Illustrator: Robert romano Printing History: March 2010 First edition Nutshell Handbook, the Nutshell Handbook logo, and the O'Reilly logo are registered trademarks of O'Reilly Media, Inc. High Performance JavaScript, the image of a short-eared owl, and related trade dress are trademarks of o Reilly media, Inc Many of the designations used by manufacturers and sellers to distinguish their products are claimed as rademarks. Where those designations appear in this book, and O'Reilly Media, Inc. was aware of a trademark claim, the designations have been printed in caps or initial caps While every precaution has been taken in the preparation of this book. the publisher and author assume no responsibility for errors or omissions, or for damages resulting from the use of the information con- tained herein Repk his book uses RepKoverTM, a durable and flexible lay-flat binding ISBN:978-0-596-80279-0 1268245906 This book is dedicated to my family, Mom, Dad, and greg, whose love and support have kept me through th g e years Table of contents Preface XI 1. Loading and execution pt ng Grouping scripts Nonblocking Scripts Deferred Scripts Dynamic Script Elements XmlhTtprequEst Script Injection Recommended Nonblocking Pattern umma 2. Data access 24556904566 Managing Scope chains and identifier resolution Identifier Resolution performance 19 Scope chain augmentation Dynamic scopes Closures, Scope, and memory Object memb 7 rototype 27 Chains 29 30 Cach ng Object Member value 31 Summary 33 3. DOM Scripting DOM in the browser World herently Slo 36 DOM Access and Modification 36 nnerhTML Versus dom methods 37 Cloning nodes HTML Collections 42 Walking the dom 46 Repaints and reflows 50 When Does a Reflow Happen? 51 Queuing and Flushing Render Tree Changes 51 Minimizing repaints and Reflows 52 Caching layout information 56 Take elements out of the flow for animations 56 IE and hover Event Delegation 57 Summary 59 Algorithms and Flow Control 61 61 Types of loops p perfo 63 Function-Based iteration 67 Condi 68 if-elseⅤ ersus switch ptimizing if up table Recursion 73 Call stack limits 74 Recursion patterns Iteration Memoization ummary 79 5. Strings and Regular Expressio 81 String concatenation 81 Plus(+)and Plus-Equals(+=)Operators Array Joining 84 String prototype concat Regular Expression optimization How Regular Expressions Work Understanding Backtracking RI unawa ly Backtracking 91 A Note on Benchmarking 96 More Ways to Improve Regular Expression Efficiency When Not to Use regular Expressions String Trimming 9 Trimming with Regular Expressions ⅶ ii Table of Contents

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zhoumi130577 是旧版的,太差了
2018-06-09
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