Passing argument to Go IIFE (following javascript example)

问题

I'm used to programming in javascript where I can do the following to pass an argument into an immediately-invoked function expression:

(function(twoSeconds) {
    // do something with "twoSeconds" here
})(2 * 1000);

So I expected to be able to do something similar in Go, as below. However, it doesn't seem to work.

func (twoSeconds) {
    // build error: "twoSeconds" undefined
}(time.Second * 2)

So I have to do this instead:

func () {
    twoSeconds := time.Second * 2
}()

Therefore, my question is how can I pass an argument into a Go IIFE? And if it's not possible, why not?

回答1:

Function arguments in Go need types. So do the following:

func(twoSeconds time.Duration) {
    // use twoSeconds
}(time.Second * 2)

来源：https://stackoverflow.com/questions/40081996/passing-argument-to-go-iife-following-javascript-example