Foundations

Learn Go from first principles — types, concurrency, interfaces, and a complete CLI capstone.

Prerequisites: Basic programming knowledge (any language). No Go experience required.

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Lab Overview

#	Lab	Key Concepts	Time
01	Hello World & Basics	Variables, types, constants, iota, control flow	20 min
02	Functions, Closures & Defer	Multiple returns, variadic, closures, defer, panic/recover	25 min
03	Arrays, Slices & Maps	Slice internals, append, copy, map patterns, generic set	30 min
04	Structs & Methods	Value/pointer receivers, embedding, constructors	30 min
05	Interfaces & Polymorphism	Implicit satisfaction, type assertions, type switches	30 min
06	Pointers & Memory	Address-of, dereference, nil safety, linked lists	25 min
07	Goroutines & Channels	WaitGroup, buffered/unbuffered channels, select, worker pool	35 min
08	Error Handling	Custom errors, errors.Is/As, wrapping, retry	30 min
09	Packages & Stdlib	os, strings, strconv, time, math, sort, log	30 min
10	File I/O & JSON	bufio, os.ReadFile, encoding/json, CSV, streaming	30 min
11	HTTP & REST	http.Client, ServeMux, middleware, httptest	35 min
12	Testing	testing.T, table-driven tests, benchmarks, httptest	30 min
13	Context & Cancellation	WithCancel, WithTimeout, values, graceful shutdown	30 min
14	Generics	Type parameters, constraints, ~, generic data structures	30 min
15	Capstone: storecli	Full CLI: JSON store, stats, concurrent fetch, context	60 min

Total estimated time: ~8 hours

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Start here: Lab 01 — Hello World & Go Basics

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Docker Quick Start

docker pull zchencow/innozverse-go:latest
docker run --rm zchencow/innozverse-go:latest go run - << 'EOF'
package main
import "fmt"
func main() {
    fmt.Println("Hello, innoZverse!")
    fmt.Println("Go version ready for labs.")
}
EOF