panic in golang code example

Example 1: golang panic

// example panic, defer and recover

package main

import "fmt"

func recoveryPanic() {
	if recoveryMessage := recover(); recoveryMessage != nil {
		fmt.Println(recoveryMessage)
	}
}

func main() {

	name := "jane doe"

	if name != "john doe" {
		defer recoveryPanic()
		panic("name is not john doe")
	} else {
		fmt.Println("nama saya adalah", name)
	}

}

Example 2: the go blog defer panic recover

func c() (i int) {
    defer func() { i++ }()
    return 1
}

Example 3: the go blog defer panic recover

func CopyFile(dstName, srcName string) (written int64, err error) {
    src, err := os.Open(srcName)
    if err != nil {
        return
    }

    dst, err := os.Create(dstName)
    if err != nil {
        return
    }

    written, err = io.Copy(dst, src)
    dst.Close()
    src.Close()
    return
}