Go - Getting Started

Transcript

1. Lesson 1 Getting Started SEP 14 2018 Nyo Backend Developer
2. Today’s Outline 認識 Go 01 安裝與環境 編輯器 開始寫 Go 語言特色 Q & A 02 03 04 05 06
3. 認識 Go Introduction for Go
4. 很多問題要解決 Introduction for Go • 提高開發效率 • 大量程式碼的管理 • 程式碼風格統一 • 大量伺服器佈署 • ...等等
5. Go Gopher Introduction for Go
6. Logo Introduction for Go
7. 發佈歷史 Introduction for Go • 2009年11月發表專案 • 2012年3月發佈 1.0 版 • 2018年8月發佈 1.11 版
8. 優勢 Introduction for Go • 老爸是 Google • 開源專案 • 編譯成執行檔，執行性能較好 • 易於開發維護 • function programing (not OOP) • goroutines 的優勢
9. Tool Introduction for Go • go get • go run • go test • go build • go install
10. 哪些專案使用 Go Introduction for Go • Kubernetes • Hugo • Prometheus • Fzf • ...etc
11. 安裝與環境 Installation
12. Download Installation curl -O https://storage.googleapis.com/golang/go1.1 0.4.linux-amd64.tar.gz
13. Install Installation sudo tar -C /usr/local -xzf go1.10.4.linux-amd64.tar.gz
14. Setting PATH Installation export PATH=$PATH:/usr/local/go/bin
15. GVM Installation • https://github.com/moovweb/gvm
16. 編輯器 Editor
17. 選擇編輯器 Editor • Vim (vim-go) • Vscode (go for vscode) • Goland • ...etc
18. Tools for Editor Editor • Auto completion (gocode • Code navigation (godef, guru • Format (gofmt, goimport • Lint (golint, gometalinter • Debug (delve
19. 開始寫 Go Write Go Code
20. 檔案結構 Write Go Code
21. GOPATH Write Go Code • Default ◦ $HOME/go • PATH ◦ export PATH=$PATH:$(go env GOPATH)/bin
22. Hello World Demo
23. 學習資源 Learning Resource
24. 官方教學網站 Learning Resource • http://tour.golang.org/ • https://golang.org/doc/effective_go.html • https://play.golang.org/
25. 語言特色 Features of Go
26. Strongly Typed Features of Go var i int var c, python, java bool var counter int = 5 var message string = "Hello" Variable declaration and initialization var counter = 5 var message = "Hello" func main(){ counter := 5 message := "Hello" } Automatically assign type
27. Struct Features of Go type Vertex struct { X int Y int z int // private } Defined v := Vertex{ X: 1, Y: 2, } v.X = 4 Create instance
28. Functional Programming Features of Go func add(m, n int) int { return m + n } Function type MyInt struct { m int n int } func (i *MyInt) sum() int { return i.m + i.n } Method
29. Package Features of Go import ( “math/rand" ) rand.Intn(10) Import package import ( "github.com/gin-gonic/gin" "github.com/gorilla/websocket" ) gin.New() Import third package
30. Concurrency: Goroutines and Channel Features of Go func say(s string) { fmt.Println(s) } go say("world") Goroutines By default, sends and receives block until the other side is ready. ch := make(chan int) ch <- v // Send v to channel ch. v := <-ch // Receive from ch, and // assign value to v. Channel
31. Interface Features of Go type Abser interface { Abs() float64 } Defined Interface type MyFloat float64 func (f MyFloat) Abs() float64 { if f < 0 { return float64(-f) } return float64(f) } Implemented interface
32. Gin + Gorilla websocket Demo
33. Q & A
34. Reference • https://golang.org/doc/code.html • https://www.slideshare.net/appleboy/go-92006325 • https://github.com/golang/go/wiki • https://en.wikipedia.org/wiki/Go_(programming_language) • https://blog.golang.org/gopher • https://github.com/nyogjtrc/practice-go
35. Thank you! Ending