英文:
How to access variables in other package
问题
你可以将全局变量移动到其他Go包中。例如：
package main
import (
"myapp/controllers"
)
var something string
func main() {
something = "some text"
}
请注意，如果你想在其他包中访问该全局变量，你需要将其导出。在Go中，以大写字母开头的标识符是可导出的，小写字母开头的标识符是私有的。所以，如果你想在其他包中访问something变量，你可以将其改为Something。
英文:
How can I move my global variable to other package in Go?
like
package main
import "myapp/controllers"
var something string
func main(){
something = "some text"
}
答案1
得分: 10
你想在你的controllers包中拥有一个全局可访问的变量吗？
package controllers
var Something string
var SomethingElse string = "whatever"
func init() {
Something = "some text"
}
然后你可以这样做：
package main
import (
"myapp/controllers"
"fmt"
)
func main() {
fmt.Println(controllers.Something, controllers.SomethingElse) // 输出：some text
}
英文:
Like you want to have a globally accessible variable in your package controllers?:
package controllers
var Something string
var SomethingElse string = "whatever"
func init(){
Something = "some text"
}
And then you can do
package main
import (
"myapp/controllers"
"fmt"
)
func main(){
fmt.Println(controllers.Something, controllers.SomethingElse) //some text
}
答案2
得分: 10
只是为了补充Dave的回答，并提到另一个可能的问题。
变量名需要以大写字母开头才能可见。
package main
import "myapp/controllers"
var Something string
func main(){
Something = "some text"
}
此外，如果您在go.mod文件中的模块名称不正常，可能会遇到问题。在这个例子中，它应该类似于这样
module myapp
go 1.16
require ()
英文:
Just to add onto Daves answer, and another possible issue you were having.
Variable names need to be Start With A Capital Letter To Be Visible
package main
import "myapp/controllers"
var Something string
func main(){
Something = "some text"
}
Additonally, you might have issues if you module name in go.mod file is weird. In this example it should look something like this
module myapp
go 1.16
require ()
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