Go Cookbook: Expert Solutions for Commonly Needed Go Tasks

Cover
Copyright
Table of Contents
Preface
	Conventions Used in This Book
	Using Code Examples
	O’Reilly Online Learning
	How to Contact Us
	Acknowledgments
Chapter 1. Getting Started Recipes
	1.0 Introduction
	1.1 Installing Go
		Problem
		Solution
		Discussion
	1.2 Playing Around with Go
		Problem
		Solution
		Discussion
	1.3 Writing a Hello World Program
		Problem
		Solution
		Discussion
	1.4 Using an External Package
		Problem
		Solution
		Discussion
	1.5 Handling Errors
		Problem
		Solution
		Discussion
	1.6 Logging Events
		Problem
		Solution
		Discussion
	1.7 Testing Your Code
		Problem
		Solution
		Discussion
Chapter 2. Module Recipes
	2.0 Introduction
	2.1 Creating a Go Module
		Problem
		Solution
		Discussion
	2.2 Importing Dependent Packages Into Your Module
		Problem
		Solution
		Discussion
	2.3 Removing Dependent Packages from Your Module
		Problem
		Solution
		Discussion
	2.4 Find Available Versions of Third-Party Packages
		Problem
		Solution
		Discussion
	2.5 Importing a Specific Version of a Dependent Package Into Your Module
		Problem
		Solution
		Discussion
	2.6 Requiring Local Versions of Dependent Packages
		Problem
		Solution
		Discussion
	2.7 Using Multiple Versions of the Same Dependent Packages
		Problem
		Solution
		Discussion
Chapter 3. Error Handling Recipes
	3.0 Introduction
		Errors Are Not Exceptions
	3.1 Handling Errors
		Problem
		Solution
		Discussion
	3.2 Simplifying Repetitive Error Handling
		Problem
		Solution
		Discussion
	3.3 Creating Customized Errors
		Problem
		Solution
		Discussion
	3.4 Wrapping an Error with Other Errors
		Problem
		Solution
		Discussion
	3.5 Inspecting Errors
		Problem
		Solution
		Discussion
	3.6 Handling Errors with Panic
		Problem
		Solution
		Discussion
	3.7 Recovering from Panic
		Problem
		Solution
		Discussion
	3.8 Handling Interrupts
		Problem
		Solution
		Discussion
Chapter 4. Logging Recipes
	4.0 Introduction
	4.1 Writing to Logs
		Problem
		Solution
		Discussion
	4.2 Change What Is Being Logged by the Standard Logger
		Problem
		Solution
		Discussion
	4.3 Logging to File
		Problem
		Solution
		Discussion
	4.4 Using Log Levels
		Problem
		Solution
		Discussion
	4.5 Logging to the System Log Service
		Problem
		Solution
		Discussion
Chapter 5. Function Recipes
	5.0 Introduction
	5.1 Defining a Function
		Problem
		Solution
		Discussion
	5.2 Accepting Multiple Data Types with a Function
		Problem
		Solution
		Discussion
	5.3 Accepting a Variable Number of Parameters
		Problem
		Solution
		Discussion
	5.4 Accepting Parameters of Any Type
		Problem
		Solution
		Discussion
	5.5 Creating an Anonymous Function
		Problem
		Solution
		Discussion
	5.6 Creating a Function That Maintains State After It Is Called
		Problem
		Solution
		Discussion
Chapter 6. String Recipes
	6.0 Introduction
	6.1 Creating Strings
		Problem
		Solution
		Discussion
	6.2 Converting String to Bytes and Bytes to String
		Problem
		Solution
		Discussion
	6.3 Creating Strings from Other Strings and Data
		Problem
		Solution
		Discussion
	6.4 Converting Strings to Numbers
		Problem
		Solution
		Discussion
	6.5 Converting Numbers to Strings
		Problem
		Solution
		Discussion
	6.6 Replacing Multiple Characters in a String
		Problem
		Solution
		Discussion
	6.7 Creating a Substring from a String
		Problem
		Solution
		Discussion
	6.8 Checking if a String Contains Another String
		Problem
		Solution
		Discussion
	6.9 Splitting a String Into an Array of Strings or Combining an Array of Strings Into a String
		Problem
		Solution
		Discussion
	6.10 Trimming Strings
		Problem
		Solution
		Discussion
	6.11 Capturing String Input from the Command Line
		Problem
		Solution
		Discussion
	6.12 Escaping and Unescaping HTML Strings
		Problem
		Solution
		Discussion
	6.13 Using Regular Expressions
		Problem
		Solution
		Discussion
Chapter 7. General Input/Output Recipes
	7.0 Introduction
	7.1 Reading from an Input
		Problem
		Solution
		Discussion
	7.2 Writing to an Output
		Problem
		Solution
		Discussion
	7.3 Copying from a Reader to a Writer
		Problem
		Solution
		Discussion
	7.4 Reading from a Text File
		Problem
		Solution
		Discussion
	7.5 Writing to a Text File
		Problem
		Solution
		Discussion
	7.6 Using a Temporary File
		Problem
		Solution
		Discussion
Chapter 8. CSV Recipes
	8.0 Introduction
	8.1 Reading the Whole CSV File
		Problem
		Solution
		Discussion
	8.2 Reading a CSV File One Row at a Time
		Problem
		Solution
		Discussion
	8.3 Unmarshalling CSV Data Into Structs
		Problem
		Solution
		Discussion
	8.4 Removing the Header Line
		Problem
		Solution
		Discussion
	8.5 Using Different Delimiters
		Problem
		Solution
		Discussion
	8.6 Ignoring Rows
		Problem
		Solution
		Discussion
	8.7 Writing CSV Files
		Problem
		Solution
		Discussion
	8.8 Writing to File One Row at a Time
		Problem
		Solution
		Discussion
Chapter 9. JSON Recipes
	9.0 Introduction
	9.1 Parsing JSON Data Byte Arrays to Structs
		Problem
		Solution
		Discussion
	9.2 Parsing Unstructured JSON Data
		Problem
		Solution
		Discussion
	9.3 Parsing JSON Data Streams Into Structs
		Problem
		Solution
		Discussion
	9.4 Creating JSON Data Byte Arrays from Structs
		Problem
		Solution
		Discussion
	9.5 Creating JSON Data Streams from Structs
		Problem
		Solution
		Discussion
	9.6 Omitting Fields in Structs
		Problem
		Solution
		Discussion
Chapter 10. Binary Recipes
	10.0 Introduction
	10.1 Encoding Data to gob Format Data
		Problem
		Solution
		Discussion
	10.2 Decoding gob Format Data to Structs
		Problem
		Solution
		Discussion
	10.3 Encoding Data to a Customized Binary Format
		Problem
		Solution
		Discussion
	10.4 Decoding Data with a Customized Binary Format to Structs
		Problem
		Solution
		Discussion
Chapter 11. Date and Time Recipes
	11.0 Introduction
	11.1 Telling Time
		Problem
		Solution
		Discussion
	11.2 Doing Arithmetic with Time
		Problem
		Solution
		Discussion
	11.3 Representing Dates
		Problem
		Solution
		Discussion
	11.4 Representing Time Zones
		Problem
		Solution
		Discussion
	11.5 Representing Duration
		Problem
		Solution
		Discussion
	11.6 Pausing for a Specific Duration
		Problem
		Solution
		Discussion
	11.7 Measuring Lapsed Time
		Problem
		Solution
		Discussion
	11.8 Formatting Time for Display
		Problem
		Solution
		Discussion
	11.9 Parsing Time Displays Into Structs
		Problem
		Solution
		Discussion
Chapter 12. Structs Recipes
	12.0 Introduction
	12.1 Defining Structs
		Problem
		Solution
		Discussion
	12.2 Creating Struct Methods
		Problem
		Solution
		Discussion
	12.3 Creating and Using Interfaces
		Problem
		Solution
		Discussion
	12.4 Creating Struct Instances
		Problem
		Solution
		Discussion
	12.5 Creating One-Time Structs
		Problem
		Solution
		Discussion
	12.6 Composing Structs from Other Structs
		Problem
		Solution
		Discussion
	12.7 Defining Metadata for Struct Fields
		Problem
		Solution
		Discussion
Chapter 13. Data Structure Recipes
	13.0 Introduction
		Arrays
		Slices
		Maps
	13.1 Creating Arrays or Slices
		Problem
		Solution
		Discussion
	13.2 Accessing Arrays or Slices
		Problem
		Solution
		Discussion
	13.3 Modifying Arrays or Slices
		Problem
		Solution
		Discussion
	13.4 Making Arrays and Slices Safe for Concurrent Use
		Problem
		Solution
		Discussion
	13.5 Sorting Arrays of Slices
		Problem
		Solution
		Discussion
	13.6 Creating Maps
		Problem
		Solution
		Discussion
	13.7 Accessing Maps
		Problem
		Solution
		Discussion
	13.8 Modifying Maps
		Problem
		Solution
		Discussion
	13.9 Sorting Maps
		Problem
		Solution
		Discussion
Chapter 14. More Data Structure Recipes
	14.0 Introduction
	14.1 Creating Queues
		Problem
		Solution
		Discussion
	14.2 Creating Stacks
		Problem
		Solution
		Discussion
	14.3 Creating Sets
		Problem
		Solution
		Discussion
	14.4 Creating Linked Lists
		Problem
		Solution
		Discussion
	14.5 Creating Heaps
		Problem
		Solution
		Discussion
	14.6 Creating Graphs
		Problem
		Solution
		Discussion
	14.7 Finding the Shortest Path on a Graph
		Problem
		Solution
		Discussion
Chapter 15. Image-Processing Recipes
	15.0 Introduction
		Image and Other Interfaces
		Image Implementations
	15.1 Loading an Image from a File
		Problem
		Solution
		Discussion
	15.2 Saving an Image to a File
		Problem
		Solution
		Discussion
	15.3 Creating Images
		Problem
		Solution
		Discussion
	15.4 Flipping an Image Upside Down
		Problem
		Solution
		Discussion
	15.5 Converting an Image to Grayscale
		Problem
		Solution
		Discussion
	15.6 Resizing an Image
		Problem
		Solution
		Discussion
Chapter 16. Networking Recipes
	16.0 Introduction
	16.1 Creating a TCP Server
		Problem
		Solution
		Discussion
	16.2 Creating a TCP Client
		Problem
		Solution
		Discussion
	16.3 Creating a UDP Server
		Problem
		Solution
		Discussion
	16.4 Creating a UDP Client
		Problem
		Solution
		Discussion
Chapter 17. Web Recipes
	17.0 Introduction
		Parts of a Web Application
	17.1 Creating a Simple Web Application
		Problem
		Solution
		Discussion
	17.2 Handling HTTP Requests
		Problem
		Solution
		Discussion
	17.3 Handling HTML Forms
		Problem
		Solution
		Discussion
	17.4 Uploading a File to a Web Application
		Problem
		Solution
		Discussion
	17.5 Serving Static Files
		Problem
		Solution
		Discussion
	17.6 Creating a JSON Web Service API
		Problem
		Solution
		Discussion
	17.7 Serving Through HTTPS
		Problem
		Solution
		Discussion
	17.8 Using Templates for Go Web Applications
		Problem
		Solution
		Discussion
	17.9 Making an HTTP Client Request
		Problem
		Solution
		Discussion
Chapter 18. Testing Recipes
	18.0 Introduction
	18.1 Automating Functional Tests
		Problem
		Solution
		Discussion
	18.2 Running Multiple Test Cases
		Problem
		Solution
		Discussion
	18.3 Setting Up and Tearing Down Before and After Tests
		Problem
		Solution
		Discussion
	18.4 Creating Subtests to  Have Finer Control Over Groups of Test Cases
		Problem
		Solution
		Discussion
	18.5 Running Tests in Parallel
		Problem
		Solution
		Discussion
	18.6 Generating Random Test Inputs for Tests
		Problem
		Solution
		Discussion
	18.7 Measuring Test Coverage
		Problem
		Solution
		Discussion
	18.8 Testing a Web Application or a Web Service
		Problem
		Solution
		Discussion
Chapter 19. Benchmarking Recipes
	19.0 Introduction
	19.1 Automating Performance Tests
		Problem
		Solution
		Discussion
	19.2 Running Only Performance Tests
		Problem
		Solution
		Discussion
	19.3 Avoiding Test Fixtures in Performance Tests
		Problem
		Solution
		Discussion
	19.4 Changing the Timing for Running Performance Tests
		Problem
		Solution
		Discussion
	19.5 Running Multiple Performance Test Cases
		Problem
		Solution
		Discussion
	19.6 Comparing Performance Test Results
		Problem
		Solution
		Discussion
	19.7 Profiling a Program
		Problem
		Solution
		Discussion
Index
About the Author