Defer Stack

Correct a mistake about defer in the code below 

  1. package main
  3. import (
  4.     "io/ioutil"
  5.     "os"
  6. )
  8. func main() {
  9.     f, err := os.Open("file")
  10.     defer f.Close()
  11.     if err != nil {
  12.         return
  13.     }
  15.     b, err := ioutil.ReadAll(f)
  16.     println(string(b))
  17. }

Answer

  2. package main
  4. import (
  5.     "io/ioutil"
  6.     "os"
  7. )
  9. func main() {
  10.     f, err := os.Open("file")
  11.     if err != nil {
  12.         return
  13.     }
  14.     defer f.Close()
  16.     b, err := ioutil.ReadAll(f)
  17.     println(string(b))
  18. }
  20.