📚 Go in 7 days - Awesome Go Library for Websites

the artwork created by Wonkeen.

🗺 Roadmap

PDF file

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📅 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 1 README

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 2 README

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 3 README

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 4 README

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 5 README

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 6 README

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

→ Day 7 README

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📝 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