go defer

wangxiuwen 技术 , 评论

调用示例一:

// main.go
package main

import "fmt"

func main() {
	fmt.Println("a")

	defer fmt.Println("b")
	defer fmt.Println("c")
}

调用示例二:

// main.go
package main

import "fmt"

func main() {
	for i := 0; i < 3; i++ {
		defer fmt.Println(i)
	}
}

调用示例三:

// main.go 打印三个3
package main

import "fmt"

func main() {
	for i := 0; i < 3; i++ {
		defer func() {
			fmt.Println(i)
		}()
	}
}

调用示例四(示例三闭包版):

// main.go
package main

import "fmt"

func main() {
	for i := 0; i < 3; i++ {
		defer func(a int) {
			fmt.Println(a)
		}(i)
	}
}