Go Language

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What you'll learn

A deep-dive into the Go programming language itself — from its type system and concurrency model to its standard library, testing philosophy, and interoperability with C. These 14 pages cover the language mechanics and idioms that make Go distinctive, independent of any application framework.

Who is this for?

Developers who have completed the Advanced tier or have existing Go experience and want a thorough understanding of the language's core features, conventions, and advanced capabilities.

The ladder

1. 01 Why Go — design principles, use cases, and where Go shines
2. 02 Types and constants — zero values, composite types, type inference, iota
3. 03 Control flow and functions — defer, panic, recover, closures, variadic functions
4. 04 Structs and methods — value vs pointer receivers, embedding, struct tags
5. 05 Interfaces — implicit satisfaction, empty interface, type assertions, type switches
6. 06 Generics — type parameters, constraints, type inference, best practices
7. 07 Error handling — sentinel errors, custom error types, wrapping, errors.Is/As
8. 08 Packages and modules — module layout, internal packages, versioning
9. 09 Goroutines and channels — goroutine lifecycle, channel patterns, select
10. 10 Sync primitives and Context — WaitGroup, Mutex, Once, context propagation
11. 11 Standard library tour — fmt, net/http, time, encoding, io, flag
12. 12 Testing and benchmarking — table-driven tests, subtests, fuzzing, benchmarks
13. 13 Reflection and code generation — reflect, go:generate, struct-to-struct mapping
14. 14 CGO and interop — calling C from Go, cgo types, build tags, limitations

Start → 01 Why Go