Go get Started

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Learning Materials http://docs.plhwin.com/gopl-zh/

A Development Environment Construction

0x1 Installation Gosdk

Windows system download Https://storage.googleapis.com/golang/go1.8.3.windows-amd64.msi need to flip the wall.

0x2 Local environment variable with

GOBIN=C:\Go\bin          GOROOT=C:\Go          GOPATH=C:\GoWrokspaces      PATH= ;C:\Go\bin;C:\GoWorkspaces\bin    

In the Goworkspaces directory, you need to create a new directory of three files, respectively, src,bin,pkg.

0x3 Installing the Development IDE

JetBrains Goglang https://www.jetbrains.com/go/
Edit Go App Run environment

Editconfiguration
Set up the app to run the main file

Run_file.

B developing basic syntax

The and of the function parameters of 0x1 "值传递""引用传递"

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 正在做体检 花费了50 还剩余额%d\n",emplyee.Name,emplyee.Wallet)}func financeRoom(emplyee *Emplyee)  {    emplyee.Wallet=emplyee.Wallet+1000;    fmt.Printf("%s 领取了工资 领取了1000 还剩余额%d\n",emplyee.Name,emplyee.Wallet)}func main() {    var emp = Emplyee{Name: "larry", Age: 32, Status: "working",Wallet:100}    fmt.Printf("员工做体检前 %v\n",emp)    healthCheckup(emp)    fmt.Printf("员工做体检后 %v\n",emp)    fmt.Printf("员工领工资前 %v\n",emp)    financeRoom(&emp)    fmt.Printf("员工领工资后 %v\n",emp)}

Output

员工做体检前 {larry 32 working 100}      larry 正在做体检 花费了50 还剩余额50      员工做体检后 {larry 32 working 100}      员工领工资前 {larry 32 working 100}      larry 领取了工资 领取了1000 还剩余额1100      员工领工资后 {larry 32 working 1100}      

0x2 interface type definition and implementation class

// 定义Service接口，包含两个方法.type Service interface {    Sum(a, b int) (int, error)    Concat(a, b string) (string, error)}// 返回实现Service接口的 basicServicefunc NewBasicService() Service {    return basicService{}}//定义一个Service接口的实现结构体type basicService struct{}// 实现Service接口的Sum方法.   func (s basicService) Sum(a, b int) (int, error) {   ...}// 实现Service接口的Concat方法.func (s basicService) Concat(a, b string) (string, error) {   ...   }

0x3 Anonymous functions

//greetingToWord 的参数为函数类型，参数名称_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() {    //传递greeting 函数    someGreeting := greetingToWord(greeting)    fmt.Println(someGreeting)    //局部实现匿名函数    someGreeting =greetingToWord(func(whom string) string {        return "2 hello "+whom    })    fmt.Println(someGreeting)    }

Output:

1 hello  word      2 hello