2.1 参数、init、main执行顺序 packagemainimport"fmt"var_int64=vartest()funcinit(){fmt.Println("init function --->")}funcvartest()int64{fmt.Println("function vartest() --->")return1}funcmain(){fmt.Println("main --->")} 执行输出如下: function vartest() ---> init function ---> main ...
packagemainimport"fmt"//多个init()函数funcinit(){ fmt.Println("Welcome to init() function") }funcinit(){ fmt.Println("Hello! init() function") }funcmain(){ fmt.Println("Welcome to main() function") } 输出: Welcome to init()functionHello!init()functionWelcometomain()function ...
init函数在每个package是可选的,可有可无,甚至可以有多个(但是强烈建议一个package中一个init函数),init函数在你导入该package时程序会自动调用init函数,所以init函数不用我们手动调用,l另外它只会被调用一次,因为当一个package被多次引用时,它只会被导入一次。 package mypackage import ("fmt")varIintfunc init()...
package main import _ "foo" func main() { } 现在程序编译成功,程序的输出结果是: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 # play foo init() is called, Global is: 1 参考Effective Go; When is the init() function in go (golang) run? 本文参与 腾讯云自媒体同步曝光计划,分享自作...
// Link https://github.com/sirupsen/logrus/blob/d5d4df1108f606433e95b17c8fbc110916779780/text_formatter.go#L26 package logrus import ( "time" ) var baseTimestamp time.Time func init() { baseTimestamp = time.Now() } 3. 没有输入输出的参数 init function is niladic. Link 如果我们给init...
packagego_hi import( "golang.org/x/mobile/bind/seq" "example/hi" ) funcproxy_Hello(out,in*seq.Buffer){ param_name:=in.ReadUTF16() hi.Hello(param_name) } funcinit(){ seq.Register("hi",1,proxy_Hello) } 这个简单的程序内容是这样的 //main.go packagemain import( "golang.org/x/mo...
main package and the main function The next step of the tutorial is to import thesimpleinterestpackage we just created and use it. We will import the simple interest package from themainpackage. Let’s first understand about themainfunction and themainpackage. ...
1 一个package或者是go文件可以包含多个init函数, 2 init函数是在main函数之前执行的, 3 init函数被自动调用,不能在其他函数中调用,显式调用会报该函数未定义 gprog.go代码 package main import ( "fmt" ) // the other init function in this go source file ...
1 一个package或者是go文件可以包含多个init函数, 2 init函数是在main函数之前执行的, 3 init函数被自动调用,不能在其他函数中调用,显式调用会报该函数未定义 gprog.go代码 package main import ( "fmt" ) // the other init function in this go source file ...
Theinit()function is optional. Theinit()function is called implicitly by Go. You can have aninit()function in the main package. In that case,init()is executed before themain()function. In fact, allinit()functions are always executed prior to themain()function. ...