# Vibe Coder 後端學習路徑 | Golang

> 目標：能看懂 AI 生成的程式碼，知道它在做什麼
> 預估時間：Go 約 1-1.5 天

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## 2.1 Go 語法 — [A Tour of Go](https://go.dev/tour/)

### Welcome（快速看）

- [ ] Welcome to a tour of Go

### Basics | Packages, variables, and functions（必做）

- [ ] Packages
- [ ] Imports
- [ ] Exported names
- [ ] Functions
- [ ] Multiple results ⭐ *（Go 可以回傳多個值）*
- [ ] Named return values
- [ ] Variables
- [ ] Short variable declarations ⭐ *（`:=` 語法）*
- [ ] Basic types
- [ ] Zero values
- [ ] Type conversions
- [ ] Constants

### Flow control | Flow control statements（必做）

- [ ] For ⭐ *（Go 只有 for，沒有 while）*
- [ ] For is Go's "while"
- [ ] If
- [ ] If with a short statement
- [ ] If and else
- [ ] Switch
- [ ] Defer ⭐ *（很常見，用於清理資源）*

### More types | Structs, slices, and maps（必做，重點！）

- [ ] Pointers *（基本了解即可）*
- [ ] Structs ⭐⭐⭐ *（Go 沒有 class，這是替代品）*
- [ ] Struct fields
- [ ] Pointers to structs
- [ ] Struct Literals
- [ ] Arrays
- [ ] Slices ⭐⭐ *（比 Array 常用）*
- [ ] Slices are like references
- [ ] Slice literals
- [ ] Slice defaults
- [ ] Slice length and capacity
- [ ] Nil slices
- [ ] Creating a slice with make
- [ ] Slices of slices *（略讀）*
- [ ] Appending to a slice ⭐
- [ ] Range ⭐ *（for 迴圈遍歷用）*
- [ ] Maps ⭐⭐ *（類似 Python 的 dict）*
- [ ] Map literals
- [ ] Mutating Maps
- [ ] Function values
- [ ] Function closures *（了解概念）*

### Methods and interfaces（重要）

- [ ] Methods ⭐⭐ *（Go 怎麼做 OOP）*
- [ ] Methods are functions
- [ ] Pointer receivers ⭐
- [ ] Interfaces ⭐⭐ *（理解概念即可）*
- [ ] Interfaces are implemented implicitly
- [ ] Interface values
- [ ] Empty interface *（`interface{}`，很常見）*
- [ ] Type assertions
- [ ] Type switches
- [ ] Errors ⭐⭐⭐ *（最重要！Go 的錯誤處理核心）*

### 可之後再學

- [ ] ~~Generics~~ *（泛型，進階主題）*
- [ ] ~~Concurrency~~ *（goroutine/channel，進階主題）*

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## 2.2 Gin 框架 — [官方 Quickstart](https://gin-gonic.com/docs/)

- [ ] Quickstart — https://gin-gonic.com/docs/quickstart/
- [ ] 看懂基本路由和 JSON 回傳

### 補充：看一個完整範例

- [ ] 找一個「Gin REST API tutorial」影片（YouTube 30-60 分鐘的）
- 關鍵字：`Go Gin REST API tutorial`
- 目標：看懂路由、Context、JSON binding 怎麼運作

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### 2.3 [Go 補充資源](https://gobyexample.com)

當你遇到不懂的語法時，來這裡查：

- [ ] 收藏 Go by Example 作為參考手冊

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## 學習完成後的自我檢核

- [ ] 我看到 `if err != nil` 不會嚇到，知道這是錯誤處理
- [ ] 我知道 `type User struct {}` 是在定義資料結構
- [ ] 我知道 `c.JSON(200, data)` 是在回傳 JSON
- [ ] 我知道 `:=` 和 `var` 的差別