學(xué)習(xí)資料 http://docs.plhwin.com/gopl-zh/
A 開發(fā)環(huán)境搭建
0x1 安裝GoSDK
Windows系統(tǒng)下載 https://storage.googleapis.com/golang/go1.8.3.windows-amd64.msi 需要翻墻盔然。
0x2 本地環(huán)境變量配
GOBIN=C:\Go\bin
GOROOT=C:\Go
GOPATH=C:\GoWrokspaces
PATH= ;C:\Go\bin;C:\GoWorkspaces\bin
GoWorkspaces 目錄下需要新建三個文件目錄沾乘，分別是src,bin,pkg。
0x3 安裝開發(fā)IDE
JetBrains Goglang https://www.jetbrains.com/go/
編輯go應(yīng)用運(yùn)行環(huán)境
EditConfiguration
設(shè)置應(yīng)用運(yùn)行main 文件
run_file.
B 開發(fā)基礎(chǔ)語法
0x1 函數(shù)參數(shù)的"值傳遞"和"引用傳遞"
type Emplyee struct {
Name string
Age int
Status string
Wallet int
}
func healthCheckup(emplyee Emplyee) {
emplyee.Status = "Do Health Checkup"
emplyee.Wallet=emplyee.Wallet-50
fmt.Printf("%s 正在做體檢 花費(fèi)了50 還剩余額%d\n",emplyee.Name,emplyee.Wallet)
}
func financeRoom(emplyee *Emplyee) {
emplyee.Wallet=emplyee.Wallet+1000;
fmt.Printf("%s 領(lǐng)取了工資 領(lǐng)取了1000 還剩余額%d\n",emplyee.Name,emplyee.Wallet)
}
func main() {
var emp = Emplyee{Name: "larry", Age: 32, Status: "working",Wallet:100}
fmt.Printf("員工做體檢前 %v\n",emp)
healthCheckup(emp)
fmt.Printf("員工做體檢后 %v\n",emp)
fmt.Printf("員工領(lǐng)工資前 %v\n",emp)
financeRoom(&emp)
fmt.Printf("員工領(lǐng)工資后 %v\n",emp)
}
輸出
員工做體檢前 {larry 32 working 100}
larry 正在做體檢 花費(fèi)了50 還剩余額50
員工做體檢后 {larry 32 working 100}
員工領(lǐng)工資前 {larry 32 working 100}
larry 領(lǐng)取了工資 領(lǐng)取了1000 還剩余額1100
員工領(lǐng)工資后 {larry 32 working 1100}
0x2 接口類型定義和實(shí)現(xiàn)類
// 定義Service接口我碟，包含兩個方法.
type Service interface {
Sum(a, b int) (int, error)
Concat(a, b string) (string, error)
}
// 返回實(shí)現(xiàn)Service接口的 basicService
func NewBasicService() Service {
return basicService{}
}
//定義一個Service接口的實(shí)現(xiàn)結(jié)構(gòu)體
type basicService struct{}
// 實(shí)現(xiàn)Service接口的Sum方法.
func (s basicService) Sum(a, b int) (int, error) {
...
}
// 實(shí)現(xiàn)Service接口的Concat方法.
func (s basicService) Concat(a, b string) (string, error) {
...
}
0x3 匿名函數(shù)
//greetingToWord 的參數(shù)為函數(shù)類型夺鲜，參數(shù)名稱_fGreeting
func greetingToWord(_fGreeting func(whom string) string) string{
word:=" word "
return _fGreeting(word)
}
func greeting(whom string)string {
return "1 hello "+ whom
}
func main() {
//傳遞greeting 函數(shù)
someGreeting := greetingToWord(greeting)
fmt.Println(someGreeting)
//局部實(shí)現(xiàn)匿名函數(shù)
someGreeting =greetingToWord(func(whom string) string {
return "2 hello "+whom
})
fmt.Println(someGreeting)
}
輸出：
1 hello word
2 hello word
