this深度面试题2

var name = "windows"
var object = {
  name:"object",
  show:function(){
  return function(){
  return this.name  
}  
}        
}

object.show()()   //windows

window.val = "1"
var obj = {
    val:"2",    
    show: function(){
    this.val *= 2
    val *= 2
    console.log(this.val)
    console.log(val)
}}

obj.show()
var fun = obj.show
fun()

4
2
8
8