Effective JavaScript: 68 Specific Ways to Harness the Power of JavaScript, Rough Cuts
- By David Herman
- Published Dec 10, 2011 by Addison-Wesley Professional. Part of the Effective Software Development Series series.
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Description
- Copyright 2013
- Dimensions: 7" x 9-1/8"
- Pages: 240
- Edition: 1st
- Rough Cuts
- ISBN-10: 0-13-290227-3
- ISBN-13: 978-0-13-290227-4
This is the Rough Cut version of the printed book.
“It’s uncommon to have a programming language wonk who can speak in such comfortable and friendly language as David does. His walk through the syntax and semantics of JavaScript is both charming and hugely insightful; reminders of gotchas complement realistic use cases, paced at a comfortable curve. You’ll find when you finish the book that you’ve gained a strong and comprehensive sense of mastery.”
—Paul Irish, developer advocate, Google Chrome
“This is not a book for those looking for shortcuts; rather it is hard-won experience distilled into a guided tour. It’s one of the few books on JS that I’ll recommend without hesitation.”
—Alex Russell, TC39 member, software engineer, Google
In order to truly master JavaScript, you need to learn how to work effectively with the language’s flexible, expressive features and how to avoid its pitfalls. No matter how long you’ve been writing JavaScript code, Effective JavaScript will help deepen your understanding of this powerful language, so you can build more predictable, reliable, and maintainable programs.
Author David Herman, with his years of experience on Ecma’s JavaScript standardization committee, illuminates the language’s inner workings as never before—helping you take full advantage of JavaScript’s expressiveness. Reflecting the latest versions of the JavaScript standard, the book offers well-proven techniques and best practices you’ll rely on for years to come.
Effective JavaScript is organized around 68 proven approaches for writing better JavaScript, backed by concrete examples. You’ll learn how to choose the right programming style for each project, manage unanticipated problems, and work more successfully with every facet of JavaScript programming from data structures to concurrency. Key features include
- Better ways to use prototype-based object-oriented programming
- Subtleties and solutions for working with arrays and dictionary objects
- Precise and practical explanations of JavaScript’s functions and variable scoping semantics
- Useful JavaScript programming patterns and idioms, such as options objects and method chaining
- In-depth guidance on using JavaScript’s unique “run-to-completion” approach to concurrency
Sample Content
Table of Contents
Foreword xiii
Preface xv
Acknowledgments xvii
About the Author xix
Chapter 1: Accustoming Yourself to JavaScript 1
Item 1: Know Which JavaScript You Are Using 1
Item 2: Understand JavaScript’s Floating-Point Numbers 7
Item 3: Beware of Implicit Coercions 9
Item 4: Prefer Primitives to Object Wrappers 15
Item 5: Avoid using == with Mixed Types 16
Item 6: Learn the Limits of Semicolon Insertion 19
Item 7: Think of Strings As Sequences of 16-Bit Code Units 25
Chapter 2: Variable Scope 31
Item 8: Minimize Use of the Global Object 31
Item 9: Always Declare Local Variables 34
Item 10: Avoid with 35
Item 11: Get Comfortable with Closures 39
Item 12: Understand Variable Hoisting 42
Item 13: Use Immediately Invoked Function Expressions to Create Local Scopes 44
Item 14: Beware of Unportable Scoping of Named Function Expressions 47
Item 15: Beware of Unportable Scoping of Block-Local Function Declarations 50
Item 16: Avoid Creating Local Variables with eval 52
Item 17: Prefer Indirect eval to Direct eval 54
Chapter 3: Working with Functions 57
Item 18: Understand the Difference between Function, Method, and Constructor Calls 57
Item 19: Get Comfortable Using Higher-Order Functions 60
Item 20: Use call to Call Methods with a Custom Receiver 63
Item 21: Use apply to Call Functions with Different Numbers of Arguments 65
Item 22: Use arguments to Create Variadic Functions 67
Item 23: Never Modify the arguments Object 68
Item 24: Use a Variable to Save a Reference to arguments 70
Item 25: Use bind to Extract Methods with a Fixed Receiver 72
Item 26: Use bind to Curry Functions 74
Item 27: Prefer Closures to Strings for Encapsulating Code 75
Item 28: Avoid Relying on the toString Method of Functions 77
Item 29: Avoid Nonstandard Stack Inspection Properties 79
Chapter 4: Objects and Prototypes 83
Item 30: Understand the Difference between prototype, getPrototypeOf, and__proto__ 83
Item 31: Prefer Object.getPrototypeOf to __proto__ 87
Item 32: Never Modify __proto__ 88
Item 33: Make Your Constructors new-Agnostic 89
Item 34: Store Methods on Prototypes 92
Item 35: Use Closures to Store Private Data 94
Item 36: Store Instance State Only on Instance Objects 95
Item 37: Recognize the Implicit Binding of this 98
Item 38: Call Superclass Constructors from Subclass Constructors 101
Item 39: Never Reuse Superclass Property Names 105
Item 40: Avoid Inheriting from Standard Classes 106
Item 41: Treat Prototypes As an Implementation D