Go Programming Language For Dummies

Ready, set, program with Go!

Now is the perfect time to learn the Go Programming Language. It's one of the most in-demand languages among tech recruiters and developers love its simplicity and power. Go Programming Language For Dummies is an easy way to add this top job skill to your toolkit. Written for novice and experienced coders alike, this book traverses basic syntax, writing functions, organizing data, building packages, and interfacing with APIs.

Go--or GoLang, as it's also known--has proven to be a strong choice for developers creating applications for the cloud-based world we live in. This book will put you on the path to using the language that's created some of today's leading web applications, so you can steer your career where you want to Go!

• Learn how Go works and start writing programs and modules
• Install and implement the most powerful third-party Go packages
• Use Go in conjunction with web services and MySQL databases
• Keep your codebase organized and use Go to structure data

With this book, you can join the growing numbers of developers using Go to create 21st century solutions. Step inside to take start writing code that puts data in users' hands.

Auteur

Wei-Meng Lee is founder of Developer Learning Solutions, specializing in hands-on technology training. His name regularly appears in publications like DevX.com, MobiForge.com, and CODE Magazine. He is also the author of SwiftUI For Dummies, Beginning Swift Programming, Python Machine Learning, and Learning WatchKit Programming.

Texte du rabat

Get going with one of today's top languages!

This book walks with you as you take your first steps in the fast-growing coding language, Go. You'll work through all the basics, and then you'll build job-ready skills for making applications that work in the cloud! Go is great at scooping up data from around the web and putting it into users' hands. With this book at your side you'll become adept at accessing, structuring, and serving data by writing applications that are easy to maintain and understand. Go is in high demand-this primer will put it on your resume.

Inside. . .

• Learn the fundamentals of Go
• Write clean, efficient functions
• Structure and organize data
• Find out all about Goroutines
• Discover third-party Go packages
• Work with web services
• Link up with REST APIs

Résumé
Ready, set, program with Go! Now is the perfect time to learn the Go Programming Language. It's one of the most in-demand languages among tech recruiters and developers love its simplicity and power. Go Programming Language For Dummies is an easy way to add this top job skill to your toolkit. Written for novice and experienced coders alike, this book traverses basic syntax, writing functions, organizing data, building packages, and interfacing with APIs. Go--or GoLang, as it's also known--has proven to be a strong choice for developers creating applications for the cloud-based world we live in. This book will put you on the path to using the language that's created some of today's leading web applications, so you can steer your career where you want to Go! Learn how Go works and start writing programs and modules Install and implement the most powerful third-party Go packages Use Go in conjunction with web services and MySQL databases Keep your codebase organized and use Go to structure data With this book, you can join the growing numbers of developers using Go to create 21st century solutions. Step inside to take start writing code that puts data in users' hands.

Contenu

Introduction 1

About This Book 1

Foolish Assumptions 2

Icons Used in This Book 2

Beyond the Book 3

Where to Go from Here 3

Part 1: Getting Started with Go 5

Chapter 1: Hello, Go! 7

Seeing What Learning Go Can Do for You 8

Installing Go on Your Machine 9

macOS 10

Windows 11

Using an Integrated Development Environment with Go 12

Writing Your First Go Program 14

Compiling and running the program 15

Understanding how a Go program works 17

Making sense of the Go file structure 18

Compiling for multiple operating systems 19

Comparing Go with Other Languages 21

Syntax 21

Compilation 22

Concurrency 22

Library support 22

Chapter 2: Working with Different Data Types 23

Declaring Always-Changing Variables 24

Using the var keyword: Type-inferred variables 24

Specifying the data type: Explicitly typed variables 25

Using the short variable declaration operator 26

Declaring Never-Changing Constants 27

Removing Unused Variables 27

Dealing with Strings 29

Performing Type Conversions 30

Discovering the type of a variable 31

Converting a variable's type 32

Interpolating strings 34

Chapter 3: Making Decisions 37

Using If/Else Statements to Make Decisions 37

Laying the foundation for the if/else statement: Logical and comparison operators 38

Using the if/else statement 40

Short-circuiting: Evaluating conditions in Go 42

When You Have Too Many Conditions: Using the Switch Statement 46

Switching with fall-throughs 47

Matching multiple cases 48

Switching without condition 48

Chapter 4: Over and Over and Over: Using Loops 51

Performing Loops Using the for Statement 51

Iterating over a Range of Values 56

Iterating through arrays/slices 56

Iterating through a string 58

Using Labels with the for Loop 59

Chapter 5: Grouping Code into Functions 65

Defining a Function 65

Defining functions with parameters 66

Defining functions with multiple parameters 68

Passing arguments by value and by pointer 68

Returning values from functions 71

Naming return values 72

Working with variadic functions 72

Using Anonymous Functions 73

Declaring an anonymous function 73

Implementing closure using anonymous functions 74

Implementing the filter() function using closure 76

Part 2: Working with Data Structures 79

Chapter 6: Slicing and Dicing Using Arrays and Slices 81

Arming Yourself to Use Arrays 81

Declaring an array 82

Initializing an array 83

Working with multidimensional arrays 83

Sleuthing Out the Secrets of Slices 86

Creating an empty slice 86

Creating and initializing a slice 88

Appending to a slice 88

Slicing and Ranging 92

Extracting part of an array or slice 92

Iterating through a slice 95

Making copies of an array or slice 95

Inserting an item into a slice 97

Removing an item from a slice 99

Chapter 7: Defining the Blueprints of Your Data Using Structs 101

Defining Structs for a Collection of Items 101

Creating a Go Struct 104

Making a Copy of a Struct 105

Defining Methods in Structs 107

Comparing Structs 110

Chapter 8: Establishing Relationships Using Maps 113

Creating Maps in Go 113

Initializing a map with a map literal 115

Checking the existence of a key 115

Deleting a key 116

Getting the number of items in a map 116

Iterating over a map 117

Getting all the keys in a map 117

Setting the iteration order in a map 118

Sorting the items in a map by values 118

Using Structs and Maps in Go 121

Creating a map of structs 121

Sorting a map of structs 124

Chapter 9: Encoding and Decoding Data Using JSON 129

Getting Acquainted with JSON 129

Object 130

String 130

Boolean 131

Number 131

Object 132

Array 132

null 133

Decoding JSON 134

Decoding JSON to a struct 135

Decoding JSON to arrays 136

Decoding embedded objects 137

Mapping custom attribute names 140

Mapping unstructured data 141

Encoding JSON 144

Encoding structs to JSON 144

Encoding interfaces to JSON 148

Chapter 10: Defining Method Signatures Using Interfaces 151

Working w…