Go 函数闭包

package main



import "fmt"



func getSequence() func() int {

   i:=0

   return func() int {

      i+=1

      return i  

   }

}



func main(){

   /* nextNumber is now a function with i as 0 */

   nextNumber := getSequence()  



   /* invoke nextNumber to increase i by 1 and return the same */

   fmt.Println(nextNumber())

   fmt.Println(nextNumber())

   fmt.Println(nextNumber())



   /* create a new sequence and see the result, i is 0 again*/

   nextNumber1 := getSequence()  

   fmt.Println(nextNumber1())

   fmt.Println(nextNumber1())

}