Install on Ubuntu

• 至 https://golang.org/dl/ 下載最新的 golang.tar
• tar xvf golang.tar
• sudo chown -R root:root ./go
• sudo mv go /usr/local
  • echo "export GOPATH=$HOME/work" >> ~/.bashrc
  • echo "export PATH=$PATH:/usr/local/go/bin:$GOPATH/bin" >> ~/.bashrc
  • mkdir $HOME/work

VSCODE 設定

• 參考 http://www.evanlin.com/dive-with-vscode-golang/
• 參考 https://github.com/Microsoft/vscode-go/wiki/Debugging-Go-code-using-VS-Code

參考書

• http://ithelp.ithome.com.tw/users/20079210/ironman/721
• http://ithelp.ithome.com.tw/articles/10156046 //IT邦幫忙教學
• https://gobyexample.com/hello-world
• http://cepave.com/http-restful-api-with-golang/
• https://golang.org/pkg/net/http/ //原廠Golang教學
• http://docs.plhwin.com/gopl-zh/ //Go语言圣经（中文版）
• http://www.01happy.com/golang-os-exec/ //介紹 os/exec模組
• http://www.gopl.io/
• https://astaxie.gitbooks.io/build-web-application-with-golang/content/zh
• https://golang.org/doc/code.html
• http://hustcat.github.io/tags/#go
• https://wizardforcel.gitbooks.io/w3school-go/content/10.html

保留字

• break default func interface select
• case defer go map struct
• chan else goto package switch
• const fallthrough if range type
• continue for import return var

變數宣告與命名方式

• 單字變數：數值、字串、布林、常數
  • var a string //宣告變數a為string型態
  • var b int = 66 //宣告變數b為整數型態，並賦值66
  • 常數
    • const Pi = 3.14159 //常數宣告

• 數組變數：陣列、切面、地圖

  • array
  • slice
  • map

• 宣告變數排版

  • `const (

    Pi = 3.14159
    

    )`
  • `var (

    a = "Sam" 
    b string = "Marc"
    c = 12
    

    )`
  • `import(

    "fmt"
    "os"
    "os/exec"
    

    )`
  • 簡短宣告(僅用於函式內)
    • s := 0 //只宣告值，型態會自動判斷 int
    • f, err := os.Open(name) //同時宣告f與err兩個變數，並賦值f=os.Open(name)與err=""
  • 完整宣告
    • var s string //只宣告型態，值為預設 ""
    • var s = "your name" //只宣告值，型態會自動判斷 string
    • `var s string = " your name" //宣告型態與值

條件式與迴圈

• for 迴圈 //Go語言僅提供for迴圈可取代 while 與 until-do -`for 起始值; 條件式; 迴圈結束後執行 {

  // zero or more statements
  

  }`
• if 條件式 //
  • `if x > 0 {

     return y
    

    }`
• switch 條件式 //
  • `switch marks { case 90:

    grade = "A"
    

    case 80:

    grade = "B"
    

    case 50, 60, 70:

    grade = "C"
    

    default:

    grade = "D"
    

    }`
• select 條件式
  • `select {

    case communication clause  :
       statement(s);      
    case communication clause  :
       statement(s); 
    default : 
       statement(s);
    

    }`
• goto 條件式 //強制前往 ( 少用)

常用函數

• fmt
  • fmt.Print() //印出變數於螢幕無段落
  • fmt.Println() //印出變數於螢幕並段落(Enter)
• log
  • log.Printf("Hello")
  • log.Fatal(err)
• os/exec
  • exec.Command()
  • cmd.Start()
  • cmd.Run()
  • cmd.Wait()