Learn Data Structures and Algorithms with Golang

Panic, defer, and recover

Panic, defer, and recover are used to handle complex errors. The last returned variable in a function is used as an error. The following code snippet is an example of this:

//main package has examples shown// in Go Data Structures and algorithms bookpackage main// importing fmt and errors packagesimport(  "fmt"  "errors")//First Func methodfunc FirstFunc(v interface{}) (interface{}, error) {  var ok bool  if !ok {    return nil, errors.New("false error")  }  return v, nil}//SecondFunc methodfunc SecondFunc() {  defer func() {    var err interface{}    if err = recover(); err != nil {      fmt.Println("recovering error ", err)    }  }()  var v interface{}  v = struct{}{}  var err error  if _, err = FirstFunc(v); err != nil {    panic(err)  } fmt.Println("The ...