golang defer

/**
  golang defer
*/
package main

import (
	"fmt"
)

var p = fmt.Println
var pf = fmt.Printf

func main() {
	defer fmt.Println("---------finally------------")
	p("--------start----------")
	defer fmt.Println("---------finally2------------")

	i := 0
	for ; i < 5; i++ {
		defer fmt.Println("---------finally:", i, "------------")
	}
	p("--------over----------")
}

結果：

--------start----------

--------over----------

---------finally: 4 ------------

---------finally: 3 ------------

---------finally: 2 ------------

---------finally: 1 ------------

---------finally: 0 ------------

---------finally2------------

---------finally------------

defer   是啥就猜猜吧！