README.md
April 4, 2026 · View on GitHub
the artwork created by Wonkeen.
🗺 Roadmap
📅 Day-by-Day Overview
Day 1 — Go Basics
| Topic | Description |
|---|---|
| Hello World | fmt.Printf basics |
| Functions | Regular, multiple return values, named returns |
| Variables & Constants | var, shorthand :=, const, global vs local |
| Basic Types | bool, string, int, float, byte, rune, numeric limits |
| Type Conversion | Explicit casting between numeric types |
| Loops | for (classic, while-style, infinite) |
| Conditionals & Switch | if/else with short statements, switch with and without a condition |
| Defer | LIFO execution order, argument evaluation at call time |
| Pointers | Address-of &, dereference *, nil pointer |
| Structs | Declaration, pointer receivers, field initialisation |
| Arrays | Fixed-length, iteration with range |
| Slices | Dynamic views over arrays, make, append, length vs capacity |
| Maps | make, literals, insert/update/delete, key-existence check |
| Function Closures | Functions capturing outer variables |
| Methods | Value and pointer receivers |
| Interfaces | Implicit satisfaction, interface variable |
| Goroutines | go keyword, channels, synchronisation with WaitGroup |
Day 2 — Concurrency
| Topic | Description |
|---|---|
| Goroutines | Launching goroutines, sending/receiving on channels |
| Buffered channels | Capacity limit, blocking behaviour |
| Closing channels | close(), two-value receive, range over channels |
| WaitGroup | Add, Done, Wait for goroutine synchronisation |
| CLI flags | flag package — declaring, parsing, and using command-line flags |
Day 3 — Error Handling, JSON & Struct Tags
| Topic | Description |
|---|---|
| Error handling | Four patterns: basic error, pkg/errors (wrap/stack/message), xerrors, and fmt.Errorf with %w |
| JSON | Encoding (json.Marshal, json.MarshalIndent), decoding (json.Unmarshal), and validation (json.Valid) |
| Struct tags | Controlling JSON output with json:"name", json:"-" (exclude), and omitempty |
| UID | Generating short unique IDs with github.com/103cuong/uid |
Day 4 — HTTP Server & REST API
| Topic | Description |
|---|---|
| Simple HTTP server | Routes and handlers using Go's built-in net/http package |
| Fiber + GORM REST API | Full CRUD API (/api/cats) using the Fiber web framework and GORM ORM with a SQLite database |
Day 5 — Go Project Template & Load Balancer
| Topic | Description |
|---|---|
| go_template | Lightweight starter template with linting, Docker, CI, and Go Modules |
| simple_load_balancer | Round-Robin HTTP load balancer with health checking using httputil.ReverseProxy and atomic operations |
Day 6 — GraphQL & Pub/Sub
| Topic | Description |
|---|---|
| simple_graphql_go | Minimal GraphQL server with graph-gophers/graphql-go |
| graphql | Schema-first GraphQL server generated by gqlgen, connected to MySQL |
| pubsub_go | In-memory Publish/Subscribe system built with Go channels and sync.RWMutex |
Day 7 — gRPC
| Topic | Description |
|---|---|
| hello_world | Minimal gRPC server and client implementing a SayHello unary RPC |
| go_grpc | Full CRUD gRPC microservice (To-Do) with MySQL, HTTP/REST gateway, and BloomRPC support |
📝 Documents
- Golang tutorial series
- Go Language Advanced Programming
- Let's Go: Learn Go in 30 days
- Go tutorials by flaviocopes.com
- Clean Go Code
- How To Code in Go
- Go cheatsheet
- gophercises - FREE coding exercises for budding gophers
- exercism.io - go
- Awesome Go
- Eli Bendersky's website
🦄 License
MIT © Cuong Nguyen