4.1 Introduction4.2 Why This Chapter Matters4.3 What You’ll Learn4.4 How to Approach This Chapter4.5 Useful Go Tools4.5.1 go run4.5.2 go build4.5.3 go test4.5.4 go fmt4.5.5 go mod4.5.6 go install4.6 Data Types4.6.1 Basic Data Typesint (Integer Types in Go)floatboolstrings and runes4.6.2 Composite Data TypesArraysSlicesMapsStructs4.7 Operators and Expressions4.7.1 Arithmetic Operators4.7.2 Comparison Operators4.7.3 Logical Operators4.8 Control Flow4.8.1 Conditional Statementsif and elseswitch4.8.2 LoopsOverview1. Traditional for Loop (like C-Style)2. Condition-Only for Loop (like while)3. Infinite for Loop4. for...range Loop4.8.3 Defer, Panic, and Recoverdeferpanicrecover4.9 Functions4.9.1 Function Declaration and Calling4.9.2 Parameters and Return Values4.9.3 Variadic Functions4.9.4 Anonymous Functions and Closures4.9.5 Function Variables and Higher-Order Functions4.9.6 Recursion4.10 Pointers in Go4.10.1 Understanding Pointers4.10.2 Pointer Variants and Operations4.10.3 Pointers in Functions4.10.4 Pointers with Arrays, Slices, and MapsArrays and PointersSlices and PointersMaps and Pointers4.10.5 Summary of Pointer Types in Go4.11 Structs and Methods4.11.1 Defining Structs4.11.2 Methods on Structs4.11.3 Pointer Receivers vs. Value Receivers4.12 Interfaces in Go4.12.1 Defining and Implementing InterfacesExample: Implementing an Interface in Steps4.12.2 Types of Interfaces in Go1. Regular Interface2. Empty Interface (interface{})3. Composite Interface4. Interface with Embedding4.12.3 Interface As Function Parameters and Return Types4.12.4 Empty Interface and Type Assertion4.12.5 Reflection with Interfaces4.12.6 Interface Internals: Memory Model4.12.7 Interface Design Patterns in Go4.13 Concurrency with Goroutines4.13.1 Introduction to GoroutinesChannels for Communication Between GoroutinesSelect Statement and Channel Operations4.13.2 Synchronization of Goroutines with Mutex and WaitGroups4.14 Error Handling4.14.1 Error Types in Go4.14.2 Handling Errors Gracefully4.14.3 Creating Custom Errors4.15 File I/O4.15.1 Reading from and Writing to Files4.15.2 Working with Buffers4.15.3 Error Checking in File Operations4.16 Unit Testing4.16.1 Testing and Benchmarking4.17 Useful Go Programming Constructs4.17.1 Timers and Tickers4.17.2 Worker Pools4.17.3 Contexts4.17.4 Circuit Breakers4.18 Summary4.18.1 What’s Next?
