예제로 살펴보는 Go : Defer

예제로 살펴보는 Go : Defer

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package main
import (
    "fmt"
    "os"
)
func main() {
    f := createFile("/tmp/defer.txt")
    defer closeFile(f)
    writeFile(f)
}
func createFile(p string) *os.File {
    fmt.Println("Creating")
    f, err := os.Create(p)
    if err != nil {
        panic(err)
    }
    return f
}
func writeFile(f *os.File) {
    fmt.Println("Writing")
    fmt.Fprintln(f, "data")
}
func closeFile(f *os.File) {
    fmt.Println("Closing")
    f.Close()
}
 
 
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