book

Modern JavaScript for the Impatient

by Cay S. Horstmann

June 2020

Intermediate to advanced

352 pages

8h 54m

English

Addison-Wesley Professional

Read now

Unlock full access

1.1 Running JavaScript1.2 Types and the typeof Operator1.3 Comments1.4 Variable Declarations1.5 Identifiers1.6 Numbers1.7 Arithmetic Operators1.8 Boolean Values1.9 null and undefined1.10 String Literals1.11 Template Literals1.12 Objects1.13 Object Literal Syntax1.14 Arrays1.15 JSON1.16 Destructuring1.17 Advanced DestructuringExercises

2.1 Expressions and Statements2.2 Semicolon Insertion2.3 Branches2.4 Boolishness2.5 Comparison and Equality Testing2.6 Mixed Comparisons2.7 Boolean Operators2.8 The switch Statement2.9 while and do Loops2.10 for Loops2.11 Breaking and Continuing2.12 Catching ExceptionsExercises
3.1 Declaring Functions3.2 Higher-Order Functions3.3 Function Literals3.4 Arrow Functions3.5 Functional Array Processing3.6 Closures3.7 Hard Objects3.8 Strict Mode3.9 Testing Argument Types3.10 Supplying More or Fewer Arguments3.11 Default Arguments3.12 Rest Parameters and the Spread Operator3.13 Simulating Named Arguments with Destructuring3.14 Hoisting3.15 Throwing Exceptions3.16 Catching Exceptions3.17 The finally ClauseExercises
4.1 Methods4.2 Prototypes4.3 Constructors4.4 The Class Syntax4.5 Getters and Setters4.6 Instance Fields and Private Methods4.7 Static Methods and Fields4.8 Subclasses4.9 Overriding Methods4.10 Subclass Construction4.11 Class Expressions4.12 The this ReferenceExercises
5.1 Number Literals5.2 Number Formatting5.3 Number Parsing5.4 Number Functions and Constants5.5 Mathematical Functions and Constants5.6 Big Integers5.7 Constructing Dates5.8 Date Functions and Methods5.9 Date FormattingExercises
6.1 Converting between Strings and Code Point Sequences6.2 Substrings6.3 Other String Methods6.4 Tagged Template Literals6.5 Raw Template Literals6.6 Regular Expressions6.7 Regular Expression Literals6.8 Flags6.9 Regular Expressions and Unicode6.10 The Methods of the RegExp Class6.11 Groups6.12 String Methods with Regular Expressions6.13 More about Regex Replace6.14 Exotic FeaturesExercises
7.1 Constructing Arrays7.2 The length Property and Index Properties7.3 Deleting and Adding Elements7.4 Other Array Mutators7.5 Producing Elements7.6 Finding Elements7.7 Visiting All Elements7.8 Sparse Arrays7.9 Reduction7.10 Maps7.11 Sets7.12 Weak Maps and Sets7.13 Typed Arrays7.14 Array BuffersExercises
8.1 The Locale Concept8.2 Specifying a Locale8.3 Formatting Numbers8.4 Localizing Dates and Times8.5 Collation8.6 Other Locale-Sensitive String Methods8.7 Plural Rules and Lists8.8 Miscellaneous Locale FeaturesExercises
9.1 Concurrent Tasks in JavaScript9.2 Making Promises9.3 Immediately Settled Promises9.4 Obtaining Promise Results9.5 Promise Chaining9.6 Rejection Handling9.7 Executing Multiple Promises9.8 Racing Multiple Promises9.9 Async Functions9.10 Async Return Values9.11 Concurrent Await9.12 Exceptions in Async FunctionsExercises
10.1 The Module Concept10.2 ECMAScript Modules10.3 Default Imports10.4 Named Imports10.5 Dynamic Imports10.6 Exports10.7 Packaging ModulesExercises
11.1 Symbols11.2 Customization with Symbol Properties11.3 Property Attributes11.4 Enumerating Properties11.5 Testing a Single Property11.6 Protecting Objects11.7 Creating or Updating Objects11.8 Accessing and Updating the Prototype11.9 Cloning Objects11.10 Function Properties11.11 Binding Arguments and Invoking Methods11.12 Proxies11.13 The Reflect Class11.14 Proxy InvariantsExercises
12.1 Iterable Values12.2 Implementing an Iterable12.3 Closeable Iterators12.4 Generators12.5 Nested Yield12.6 Generators as Consumers12.7 Generators and Asynchronous Processing12.8 Async Generators and IteratorsExercises
13.1 Type Annotations13.2 Running TypeScript13.3 Type Terminology13.4 Primitive Types13.5 Composite Types13.6 Type Inference13.7 Subtypes13.8 Classes13.9 Structural Typing13.10 Interfaces13.11 Indexed Properties13.12 Complex Function Parameters13.13 Generic ProgrammingExercises

Content preview from Modern JavaScript for the Impatient

Chapter 11. Metaprogramming

Topics in This Chapter

11.1 Symbols

11.2 Customization with Symbol Properties

11.3 Property Attributes

11.4 Enumerating Properties

11.5 Testing a Single Property

11.6 Protecting Objects

11.7 Creating or Updating Objects

11.8 Accessing and Updating the Prototype

11.9 Cloning Objects

11.10 Function Properties

11.11 Binding Arguments and Invoking Methods

11.12 Proxies

11.13 The Reflect Class

11.14 Proxy Invariants

Exercises

This chapter is a deep dive into advanced APIs that you can use to create objects that have nonstandard behavior, and to write code that works with generic objects.

We start by looking at symbols, the only type other than strings ...