Learning Go Programming Training Course

1. Introduction to Go

• Overview of Go (Golang)
• Historical background and design philosophy
• Go as a language for web and systems programming
• Key features:
  • Static typing
  • Emphasis on simplicity and readability
  • Rapid compilation
  • Native concurrency support
  • Automatic garbage collection
  • Cross-platform compilation capabilities
• Typical use cases for Go
• Strengths and constraints of the language
• Comparison of Go with C/C++, JavaScript, Ruby, Python, and Java
• Understanding the Go ecosystem
• Overview of the standard library
• Go modules and dependency management
• Anatomy of a Go application
• Hands-on: Examine and execute a basic Go program

2. Setting Up the Go Development Environment

• Installation procedures for Go
• Understanding the Go toolchain
• Configuring necessary environment variables
• Selecting an IDE or code editor
• Using the command line for Go operations
• Setting up a Go workspace
• Understanding Go project structure
• Initializing a project using Go Modules
• Using go mod init
• Managing dependencies with go get
• Updating and verifying dependencies
• Formatting source code using gofmt
• Executing programs with go run
• Building applications with go build
• Installing Go applications
• Cross-compilation techniques
• Hands-on: Create and configure a Go project within a container

3. Go Variables, Constants and Types

• Declaring variables
• Explicit types versus type inference
• Short variable declaration syntax
• Defining constants
• Understanding zero values
• Variable scope and lifetime
• Primitive data types:
  • Integers
  • Floating-point numbers
  • Complex numbers
  • Boolean values
  • Strings
• Type conversion techniques
• Handling Unicode and UTF-8
• Working with runes and bytes
• Multiple variable assignment
• Understanding type safety mechanisms
• Exercise: Develop a simple command-line data-processing program

4. Operators and Expressions

• Arithmetic operators
• Comparison operators
• Logical operators
• Assignment operators
• Increment and decrement operations
• Operator precedence rules
• Performing integer and floating-point calculations
• Preventing common type-conversion errors
• Exercise: Implement calculation and validation logic

5. Dates, Times and Formatting

• Utilizing the time package
• Creating and manipulating date objects
• Retrieving the current time
• Managing time zones and locations
• Parsing date and time strings
• Formatting output for dates and times
• Calculating time durations
• Working with Unix timestamps
• Implementing timeouts
• Exercise: Integrate timestamps and duration calculations into an application

6. Arrays, Slices, Maps and Structs

Arrays

• Array declaration
• Initialization methods
• Iterating through arrays
• Working with multidimensional arrays

Slices

• Distinguishing slices from arrays
• Creating new slices
• Appending elements to slices
• Copying slice data
• Understanding slice length and capacity
• Slicing existing slices
• Avoiding common slice-related pitfalls

Maps

• Creating map instances
• Adding and deleting entries
• Checking for key existence
• Iterating over map contents
• Storing complex data structures in maps

Structs

• Defining custom structures

• Working with struct fields

• Initializing struct instances

• Nested struct definitions

• Using anonymous structs

• Defining struct methods

• Applying JSON struct tags

• Hands-on: Model users, products, and application data using structs, slices, and maps

7. Conditional Logic and Loops

• Using if statements
• Implementing else and else if conditions
• Declaring variables within conditional blocks
• Using for loops
• Creating infinite loops
• Defining loop termination conditions
• Using break and continue statements
• Iterating with range
• Nested loop structures
• Using switch statements
• Expression-based switch cases
• Handling multiple cases
• Defining default cases
• Implementing type switches
• Exercise: Implement application validation and processing logic

8. Functions

• Function definition syntax
• Handling function parameters
• Returning values
• Multiple return values
• Named return values
• Variadic function arguments
• Anonymous (closure) functions
• Using functions as values
• Working with closures
• Recursive function calls
• Passing functions as arguments
• Functions that return errors
• Designing small, reusable functions
• Exercise: Refactor existing code into reusable functional units

9. Pointers and Memory Concepts

• Concept of pointers
• Address-of and dereference operators
• Pointers in function parameters
• Pointer receivers in methods
• Pointers to struct instances
• Understanding nil pointers
• Best practices for pointer usage
• Value versus reference semantics
• Go's memory management and garbage collection
• Common pointer-related errors
• Hands-on: Modify application data structures using pointers

10. Creating a Web Application in Go

• Overview of Go's web development capabilities
• Introduction to the net/http package
• Setting up an HTTP server
• Handling HTTP requests and responses
• Understanding HTTP methods
• Parsing request URLs and query parameters
• Managing HTTP headers
• Interpreting HTTP status codes
• Routing basics
• Implementing request handlers
• Processing form data
• Serving static assets
• Working with HTML templates
• Template variables and logic control
• Architecting a web application
• Hands-on: Build a foundational Go web server

11. Building a RESTful Web Service

• Core concepts of REST architecture
• Designing API endpoints
• Implementing GET, POST, PUT, PATCH, and DELETE
• Working with JSON data
• JSON encoding and decoding
• Validating incoming requests
• Managing HTTP status codes
• Constructing error responses
• Handling query and path parameters
• Structuring API responses
• Separating handlers from business logic
• Hands-on: Build a CRUD REST API

12. Go Runtime, Compilation and Project Builds

• Understanding the Go compiler
• The Go build process
• Using go run
• Using go build
• Using go install
• Using go test
• Configuring build flags
• Environment-specific configuration
• Building for various operating systems and architectures
• Generating standalone binaries
• Managing application configuration files
• Exercise: Compile the application for multiple target platforms

13. Working with Files and the Web

• Opening and closing file handles
• Reading file contents
• Writing data to files
• Creating directory structures
• Accessing file metadata
• Using buffered I/O
• Handling data streams
• Reading and writing JSON files
• Implementing HTTP clients
• Making outbound HTTP requests
• Handling client-side errors
• Setting timeouts and cancellation signals
• Processing API responses
• Hands-on: Fetch data from an external API and store it locally

14. Error Handling and Debugging

• Go's philosophy on error handling
• Returning errors from functions
• Checking for error conditions
• Creating custom error types
• Wrapping errors for context
• Adding contextual information to errors
• Using errors.Is and errors.As
• Panic and recovery mechanisms
• Appropriate use of panic
• Debugging common Go issues
• Logging application activities
• Utilizing Go debugging tools
• Exercise: Diagnose and resolve intentionally introduced application errors

15. Interfaces and Abstraction

• Definition of interfaces
• Implicit interface satisfaction
• Declaring custom interfaces
• Interface values
• Empty interfaces and the any type
• Type assertions
• Type switching logic
• Pointer versus value receiver implementations
• Designing granular interfaces
• Dependency inversion principle
• Leveraging interfaces for testability
• Reducing coupling in applications
• Hands-on: Integrate interfaces into the sample web application

16. Packages and Project Organization

• Creating new packages
• Package naming best practices
• Exported versus unexported identifiers
• Importing external packages
• Package initialization sequences
• Structuring application layers
• Using internal packages
• Dependency management via Go Modules
• Applying semantic versioning
• Incorporating third-party libraries
• Preventing circular dependencies
• Designing maintainable Go projects
• Exercise: Refactor the application into distinct packages

17. Concurrency with Goroutines

• Concepts of concurrency
• Introduction to Goroutines
• Spawning goroutines
• Understanding lightweight concurrent execution
• Synchronization requirements
• Managing shared state
• Preventing race conditions
• Using sync.WaitGroup
• Implementing mutexes and read/write mutexes
• Performing atomic operations
• Hands-on: Transform a sequential task into a concurrent process

18. Channels

• Understanding channels
• Sending and receiving data through channels
• Buffered versus unbuffered channels
• Blocking behavior in channels
• Closing channels safely
• Iterating over channels
• Directional channel types
• Channel-based communication patterns
• Using select statements
• Handling timeouts and cancellation via channels
• Implementing worker-pool patterns
• Implementing producer/consumer patterns
• Hands-on: Build a concurrent worker system

19. Context and Request Management

• Importance of context in web applications
• Using context.Context
• Request-scoped contexts
• Implementing cancellation signals
• Setting deadlines
• Managing timeouts
• Propagating context across application layers
• Cancelling database or HTTP operations
• Avoiding common context usage errors
• Exercise: Add request cancellation and timeout support to the web application

20. Testing Go Applications

• Significance of automated testing
• Writing unit tests
• Using the testing package
• Defining test functions
• Following test naming conventions
• Writing table-driven tests
• Testing error handling paths
• Testing HTTP handlers
• Using HTTP test servers
• Setting up test fixtures
• Measuring test coverage
• Writing benchmarks
• Writing example tests
• Mocking or faking interfaces for testing
• Hands-on: Create a comprehensive test suite for the sample application

21. Performance Optimization

• Assessing Go application performance
• Identifying performance bottlenecks
• Optimizing CPU versus memory usage
• Selecting efficient data structures
• Minimizing unnecessary memory allocations
• Efficient handling of strings, bytes, and buffers
• Managing goroutine overhead
• Avoiding excessive concurrency
• Implementing caching strategies
• Optimizing database and network interactions
• Profiling application performance
• Running benchmarks and performance tests
• Utilizing Go's built-in profiling tools
• Exercise: Profile and optimize a deliberately inefficient application

22. Security and Robust Web Application Practices

• Validating user input
• Secure handling of HTTP requests
• Preventing common web vulnerabilities
• Secure error message handling
• Authentication and authorization principles
• Managing secrets and configuration securely
• Implementing secure HTTP communication
• Preventing sensitive data leakage in logs
• Dependency security and updates
• Setting resource limits and request timeouts
• Exercise: Review and harden the sample API

23. Application Logging and Observability

• Foundations of logging
• Implementing structured logging
• Managing log levels
• Logging HTTP requests
• Logging errors
• Using correlation and request IDs
• Monitoring application behavior
• Collecting basic metrics
• Implementing health-check endpoints
• Diagnosing production issues
• Hands-on: Add structured logging and health checks to the application

24. Containerizing the Go Application

• Benefits of containerization
• Go applications and container workflows
• Writing a Dockerfile
• Using multi-stage builds
• Creating minimal runtime images
• Managing configuration via environment variables
• Container networking basics
• Exposing application ports
• Running the application in a container
• Testing the containerized build
• Hands-on: Package the sample Go application as a production-ready container

25. Deployment

• Preparing the application for production
• Building optimized production binaries
• Configuring the production environment
• Implementing container-based deployment
• Designing deployment architecture
• Configuring reverse proxies
• HTTPS/TLS security considerations
• Implementing application health checks
• Implementing graceful shutdown
• Handling operating-system signals
• Scaling Go web applications
• Horizontal versus vertical scaling strategies
• Basic deployment troubleshooting
• Hands-on: Deploy the sample web application to a production environment

26. Capstone: Complete Go Web Application

Participants consolidate their knowledge by developing a complete, functional application.

The project may include:

• Project initialization using Go Modules
• Logical package organization
• HTTP routing configuration
• Implementation of REST API endpoints
• JSON request and response handling
• Input validation mechanisms
• Robust error handling
• Interface implementation
• Concurrent processing patterns
• External API integration
• Persistence using files or databases
• Automated testing suites
• Structured logging
• Performance optimization
• Containerization
• Production configuration setup
• Final deployment steps

27. Review and Best Practices

• Review of core Go syntax
• Adhering to Go coding conventions
• Writing idiomatic Go code
• Keeping code simple and clear
• Effective package design strategies
• Error-handling best practices
• Principles of interface design
• Concurrency best practices
• Effective testing strategies
• Performance considerations
• Maintainability and readability standards
• Common pitfalls for new Go developers
• Recommended next steps for continued Go development

28. Conclusion

• Recap of key concepts
• Review of the completed web application
• Q&A and discussion session
• Troubleshooting common real-world scenarios
• Recommended next steps for Go development
• Exploration of additional Go libraries and ecosystem resources
• Opportunities for building production-grade Go services