Question

I am having trouble transferring a variable into an anonymous function. Is there a solution?

import  "github.com/lxn/walk"

***

var openAction [12]*walk.Action
for i := 0; i < 12; i++ {

    openBmp, err := walk.NewBitmapFromFile(_films[i][0])
    if err != nil {
        log.Printf("Open bitmap for buildBody() :%v\n", err)
    }
    openAction[i] = walk.NewAction()
    openAction[i].SetImage(openBmp)
    openAction[i].SetText(_films[i][2])
    openAction[i].Triggered().Attach( func(){
        exec(i)
    })
    mw.ToolBar().Actions().Add(openAction[i])
}

exec(i) where i always = 11

Answer 1

I think that this will get you what you want:

openAction[i].Triggered().Attach(func(x int) func() {
    return func() { exec(x) }
}(i))

The trick is to have your anonymous function return an anonymous function, and each created function will enclose each of the values of i.