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EffectiveJavaScript

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更新 EffectiveJavaScript 到 JavaScript 新版。

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# Effective JavaScript

deepJS 讀書會的其中一本書。
希望可以透過這個討論將這本書更新到有 ES6+ 的內容。
將不需要討論的部份汰換掉。

會以中文版為主要更新內容

## 原版資訊

- [英文原文官網](http://effectivejs.com/)
- [原文戡誤表](https://github.com/effectivejs/site/wiki/Errata)

## Effective 後來的 JavaScript

- [Effective ES6](https://www2.slideshare.net/teppeis/effective-es6)
- [從ECMAScript看語言約束](https://www.ithome.com.tw/voice/89425)
- [An Effective Guide to Modern JavaScript: (ECMAScript 2017 / ES8)](https://www.amazon.com/Effective-Guide-Modern-JavaScript-ECMAScript/dp/1974207927)

## Chapter 1: Accustoming Yourself to JavaScript

- [x] [Item 01: Know Which JavaScript You Are Using](Chapter%201%3A%20Accustoming%20Yourself%20to%20JavaScript/Item%2001%3A%20Know%20Which%20JavaScript%20You%20Are%20Using.md)
- [x] [Item 02: Understand JavaScript's Floating-Point Numbers](Chapter%201%3A%20Accustoming%20Yourself%20to%20JavaScript/Item%2002%3A%20Understand%20JavaScript's%20Floating-Point%20Numbers.md)
- [x] [Item 03: Beware of Implicit Coercions](Chapter%201%3A%20Accustoming%20Yourself%20to%20JavaScript/Item%2003%3A%20Beware%20of%20Implicit%20Coercions.md)
- [x] [Item 04: Prefer Primitives to Object Wrappers](Chapter%201%3A%20Accustoming%20Yourself%20to%20JavaScript/Item%2004%3A%20Prefer%20Primitives%20to%20Object%20Wrappers.md)
- [x] [Item 05: Avoid using == with Mixed Types](Chapter%201%3A%20Accustoming%20Yourself%20to%20JavaScript/Item%2005%3A%20Avoid%20using%20==%20with%20Mixed%20Types.md)
- [x] [Item 06: Learn the Limits of Semicolon Insertion](Chapter%201%3A%20Accustoming%20Yourself%20to%20JavaScript/Item%2006%3A%20Learn%20the%20Limits%20of%20Semicolon%20Insertion.md)
- [x] [Item 07: Think of Strings As Sequences of 16-Bit Code Units](Chapter%201%3A%20Accustoming%20Yourself%20to%20JavaScript/Item%2007:%20Think%20of%20Strings%20As%20Sequences%20of%2016-Bit%20Code%20Units.md)

## Chapter 2: Variable Scope

- [x] [Item 08: Minimize Use of the Global Object](Chapter%202%3A%20Variable%20Scope/Item%2008%3A%20Minimize%20Use%20of%20the%20Global%20Object.md)
- [x] [Item 09: Always Declare Local Variables](Chapter%202%3A%20Variable%20Scope/Item%2009%3A%20Always%20Declare%20Local%20Variables.md)
- [x] [Item 10: Avoid with](Chapter%202%3A%20Variable%20Scope/Item%2010%3A%20Avoid%20with.md)
- [x] [Item 11: Get Comfortable with Closures](Chapter%202%3A%20Variable%20Scope/Item%2011%3A%20Get%20Comfortable%20with%20Closures.md)
- [x] [Item 12: Understand Variable Hoisting](Chapter%202%3A%20Variable%20Scope/Item%2012%3A%20Understand%20Variable%20Hoisting.md)
- [x] [Item 13: Use Immediately Invoked Function Expressions to Create Local Scopes](Chapter%202%3A%20Variable%20Scope/Item%2013:%20Use%20Immediately%20Invoked%20Function%20Expressions%20to%20Create%20Local%20Scopes.md)
- [x] [Item 14: Beware of Unportable Scoping of Named Function Expressions](Chapter%202%3A%20Variable%20Scope/Item%2014:%20Beware%20of%20Unportable%20Scoping%20of%20Named%20Function%20Expressions.md)
- [x] [Item 15: Beware of Unportable Scoping of Block-Local Function Declarations](Chapter%202%3A%20Variable%20Scope/Item%2015:%20Beware%20of%20Unportable%20Scoping%20of%20Block-Local%20Function%20Declarations.md)
- [x] [Item 16: Avoid Creating Local Variables with eval](Chapter%202%3A%20Variable%20Scope/Item%2016%3A%20Avoid%20Creating%20Local%20Variables%20with%20eval.md)
- [x] [Item 17: Prefer Indirect eval to Direct eval](Chapter%202%3A%20Variable%20Scope/Item%2017%3A%20Prefer%20Indirect%20eval%20to%20Direct%20eval.md)

## Chapter 3: Working with Functions

- [x] [Item 18: Understand the Difference between Function, Method, and Constructor Calls](Chapter%203%3A%20Working%20with%20Functions/Item%2018:%20Understand%20the%20Difference%20between%20Function,%20Method,%20and%20Constructor%20Calls.md)
- [x] [Item 19: Get Comfortable Using Higher-Order Functions](Chapter%203%3A%20Working%20with%20Functions/Item%2019%3A%20Get%20Comfortable%20Using%20Higher-Order%20Functions.md)
- [x] [Item 20: Use call to Call Methods with a Custom Receiver](Chapter%203%3A%20Working%20with%20Functions/Item%2020%3A%20Use%20call%20to%20Call%20Methods%20with%20a%20Custom%20Receiver.md)
- [x] [Item 21: Use apply to Call Functions with Different Numbers of Arguments](Chapter%203%3A%20Working%20with%20Functions/Item%2021:%20Use%20apply%20to%20Call%20Functions%20with%20Different%20Numbers%20of%20Arguments.md)
- [x] [Item 22: Use arguments to Create Variadic Functions](Chapter%203%3A%20Working%20with%20Functions/Item%2022%3A%20Use%20arguments%20to%20Create%20Variadic%20Functions.md)
- [x] [Item 23: Never Modify the arguments Object](Chapter%203%3A%20Working%20with%20Functions/Item%2023%3A%20Never%20Modify%20the%20arguments%20Object.md)
- [x] [Item 24: Use a Variable to Save a Reference to arguments](Chapter%203%3A%20Working%20with%20Functions/Item%2024%3A%20Use%20a%20Variable%20to%20Save%20a%20Reference%20to%20arguments.md)
- [x] [Item 25: Use bind to Extract Methods with a Fixed Receiver](Chapter%203%3A%20Working%20with%20Functions/Item%2025%3A%20Use%20bind%20to%20Extract%20Methods%20with%20a%20Fixed%20Receiver.md)
- [x] [Item 26: Use bind to Curry Functions](Chapter%203%3A%20Working%20with%20Functions/Item%2026%3A%20Use%20bind%20to%20Curry%20Functions.md)
- [x] [Item 27: Prefer Closures to Strings for Encapsulating Code](Chapter%203%3A%20Working%20with%20Functions/Item%2027%3A%20Prefer%20Closures%20to%20Strings%20for%20Encapsulating%20Code.md)
- [x] [Item 28: Avoid Relying on the toString Method of Functions](Chapter%203%3A%20Working%20with%20Functions/Item%2028%3A%20Avoid%20Relying%20on%20the%20toString%20Method%20of%20Functions.md)
- [x] [Item 29: Avoid Nonstandard Stack Inspection Properties](Chapter%203%3A%20Working%20with%20Functions/Item%2029%3A%20Avoid%20Nonstandard%20Stack%20Inspection%20Properties.md)

## Chapter 4: Objects and Prototypes

- [x] [Item 30: Understand the Difference between prototype, getPrototypeOf, and `__proto__`](Chapter%204%3A%20Objects%20and%20Prototypes/Item%2030:%20Understand%20the%20Difference%20between%20prototype,%20getPrototypeOf,%20and__proto__.md)
- [x] [Item 31: Prefer Object.getPrototypeOf to `__proto__`](Chapter%204%3A%20Objects%20and%20Prototypes/Item%2031%3A%20Prefer%20Object.getPrototypeOf%20to%20__proto__.md)
- [x] [Item 32: Never Modify `__proto__`](Chapter%204%3A%20Objects%20and%20Prototypes/Item%2032%3A%20Never%20Modify%20__proto__.md)
- [x] [Item 33: Make Your Constructors new-Agnostic](Chapter%204%3A%20Objects%20and%20Prototypes/Item%2033%3A%20Make%20Your%20Constructors%20new-Agnostic.md)
- [x] [Item 34: Store Methods on Prototypes](Chapter%204%3A%20Objects%20and%20Prototypes/Item%2034%3A%20Store%20Methods%20on%20Prototypes.md)
- [x] [Item 35: Use Closures to Store Private Data](Chapter%204%3A%20Objects%20and%20Prototypes/Item%2035%3A%20Use%20Closures%20to%20Store%20Private%20Data.md)
- [x] [Item 36: Store Instance State Only on Instance Objects](Chapter%204%3A%20Objects%20and%20Prototypes/Item%2036%3A%20Store%20Instance%20State%20Only%20on%20Instance%20Objects.md)
- [x] [Item 37: Recognize the Implicit Binding of this](Chapter%204%3A%20Objects%20and%20Prototypes/Item%2037%3A%20Recognize%20the%20Implicit%20Binding%20of%20this.md)
- [x] [Item 38: Call Superclass Constructors from Subclass Constructors](Chapter%204%3A%20Objects%20and%20Prototypes/Item%2038:%20Call%20Superclass%20Constructors%20from%20Subclass%20Constructors.md)
- [x] [Item 39: Never Reuse Superclass Property Names](Chapter%204%3A%20Objects%20and%20Prototypes/Item%2039%3A%20Never%20Reuse%20Superclass%20Property%20Names.md)
- [x] [Item 40: Avoid Inheriting from Standard Classes](Chapter%204%3A%20Objects%20and%20Prototypes/Item%2040%3A%20Avoid%20Inheriting%20from%20Standard%20Classes.md)
- [x] [Item 41: Treat Prototypes As an Implementation Detail](Chapter%204%3A%20Objects%20and%20Prototypes/Item%2041%3A%20Treat%20Prototypes%20As%20an%20Implementation%20Detail.md)
- [x] [Item 42: Avoid Reckless Monkey-Patching](Chapter%204%3A%20Objects%20and%20Prototypes/Item%2042%3A%20Avoid%20Reckless%20Monkey-Patching.md)

## Chapter 5: Arrays and Dictionaries

- [x] [Item 43: Build Lightweight Dictionaries from Direct Instances of Object](Chapter%205%3A%20Arrays%20and%20Dictionaries/Item%2043:%20Build%20Lightweight%20Dictionaries%20from%20Direct%20Instances%20of%20Object.md)
- [x] [Item 44: Use null Prototypes to Prevent Prototype Pollution](Chapter%205%3A%20Arrays%20and%20Dictionaries/Item%2044%3A%20Use%20null%20Prototypes%20to%20Prevent%20Prototype%20Pollution.md)
- [x] [Item 45: Use hasOwnProperty to Protect Against Prototype Pollution](Chapter%205%3A%20Arrays%20and%20Dictionaries/Item%2045:%20Use%20hasOwnProperty%20to%20Protect%20Against%20Prototype%20Pollution.md)
- [x] [Item 46: Prefer Arrays to Dictionaries for Ordered Collections](Chapter%205%3A%20Arrays%20and%20Dictionaries/Item%2046:%20Prefer%20Arrays%20to%20Dictionaries%20for%20Ordered%20Collections.md)
- [x] [Item 47: Never Add Enumerable Properties to Object.prototype](Chapter%205%3A%20Arrays%20and%20Dictionaries/Item%2047%3A%20Never%20Add%20Enumerable%20Properties%20to%20Object.prototype.md)
- [x] [Item 48: Avoid Modifying an Object during Enumeration](Chapter%205%3A%20Arrays%20and%20Dictionaries/Item%2048%3A%20Avoid%20Modifying%20an%20Object%20during%20Enumeration.md)
- [x] [Item 49: Prefer for Loops to for...in Loops for Array Iteration](Chapter%205%3A%20Arrays%20and%20Dictionaries/Item%2049%3A%20Prefer%20for%20Loops%20to%20for...in%20Loops%20for%20Array%20Iteration.md)
- [x] [Item 50: Prefer Iteration Methods to Loops](Chapter%205%3A%20Arrays%20and%20Dictionaries/Item%2050%3A%20Prefer%20Iteration%20Methods%20to%20Loops.md)
- [x] [Item 51: Reuse Generic Array Methods on Array-Like Objects](Chapter%205%3A%20Arrays%20and%20Dictionaries/Item%2051%3A%20Reuse%20Generic%20Array%20Methods%20on%20Array-Like%20Objects.md)
- [x] [Item 52: Prefer Array Literals to the Array Constructor](Chapter%205%3A%20Arrays%20and%20Dictionaries/Item%2052%3A%20Prefer%20Array%20Literals%20to%20the%20Array%20Constructor.md)

## Chapter 6: Library and API Design

- [x] [Item 53: Maintain Consistent Conventions](Chapter%206%3A%20Library%20and%20API%20Design/Item%2053%3A%20Maintain%20Consistent%20Conventions.md)
- [x] [Item 54: Treat undefined AsNo Value](Chapter%206%3A%20Library%20and%20API%20Design/Item%2054%3A%20Treat%20undefined%20AsNo%20Value.md)
- [x] [Item 55: Accept Options Objects for Keyword Arguments ](Chapter%206%3A%20Library%20and%20API%20Design/Item%2055%3A%20Accept%20Options%20Objects%20for%20Keyword%20Arguments%20.md)
- [x] [Item 56: Avoid Unnecessary State](Chapter%206%3A%20Library%20and%20API%20Design/Item%2056%3A%20Avoid%20Unnecessary%20State.md)
- [x] [Item 57: Use Structural Typing for Flexible Interfaces](Chapter%206%3A%20Library%20and%20API%20Design/Item%2057%3A%20Use%20Structural%20Typing%20for%20Flexible%20Interfaces.md)
- [x] [Item 58: Distinguish between Array and Array-Like](Chapter%206%3A%20Library%20and%20API%20Design/Item%2058%3A%20Distinguish%20between%20Array%20and%20Array-Like.md)
- [x] [Item 59: Avoid Excessive Coercion](Chapter%206%3A%20Library%20and%20API%20Design/Item%2059%3A%20Avoid%20Excessive%20Coercion.md)
- [x] [Item 60: Support Method Chaining](Chapter%206%3A%20Library%20and%20API%20Design/Item%2060%3A%20Support%20Method%20Chaining.md)

## Chapter 7: Concurrency

- [x] [Item 61: Don't Block the Event Queue on IO](Chapter%207%3A%20Concurrency/Item%2061%3A%20Don't%20Block%20the%20Event%20Queue%20on%20IO.md)
- [x] [Item 62: Use Nested or Named Callbacks for Asynchronous Sequencing](Chapter%207%3A%20Concurrency/Item%2062%3A%20Use%20Nested%20or%20Named%20Callbacks%20for%20Asynchronous%20Sequencing.md)
- [x] [Item 63: Be Aware of Dropped Errors](Chapter%207%3A%20Concurrency/Item%2063%3A%20Be%20Aware%20of%20Dropped%20Errors.md)
- [x] [Item 64: Use Recursion for Asynchronous Loops](Chapter%207%3A%20Concurrency/Item%2064%3A%20Use%20Recursion%20for%20Asynchronous%20Loops.md)
- [x] [Item 65: Don't Block the Event Queue on Computation](Chapter%207%3A%20Concurrency/Item%2065%3A%20Don't%20Block%20the%20Event%20Queue%20on%20Computation.md)
- [x] [Item 66: Use a Counter to Perform Concurrent Operations](Chapter%207%3A%20Concurrency/Item%2066%3A%20Use%20a%20Counter%20to%20Perform%20Concurrent%20Operations.md)
- [x] [Item 67: Never Call Asynchronous Callbacks Synchronously](Chapter%207%3A%20Concurrency/Item%2067%3A%20Never%20Call%20Asynchronous%20Callbacks%20Synchronously.md)
- [x] [Item 68: Use Promises for Cleaner Asynchronous Logic](Chapter%207%3A%20Concurrency/Item%2068%3A%20Use%20Promises%20for%20Cleaner%20Asynchronous%20Logic.md)

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