朋友的問題.雖然這玩意只玩過一次.
但還是為這問題再去玩了一下.順道筆記一下
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| package main
import (
"os"
"io/ioutil"
)
const (
FILENAME = "test.txt"
)
func createFile() {
file, err := os.Create(FILENAME)
if err != nil {
panic(err)
}
defer file.Close()
}
func appendContent() {
file, openErr := os.OpenFile(FILENAME, os.O_APPEND | os.O_WRONLY, 0666)
if openErr != nil {
panic(openErr)
}
defer file.Close()
_, writeErr := file.WriteString("This is a test content 1\n")
if writeErr != nil {
panic(writeErr)
}
}
func exampleForIOUtilWriteFile() {
ioutil.WriteFile(FILENAME, []byte("This is a test content 2\n"), os.ModeAppend)
}
func main() {
_, err := os.Stat(FILENAME)
if os.IsNotExist(err) {
createFile()
}
appendContent()
// exampleForIOUtilWriteFile()
}
|
