goland writer interface
- Writer Interface
- 長這樣
-
type Writer interface { Write(p []byte) (n int, err error) } - 今天package os 裡面的 type File 有 attach method
-
func (f *File) Write(b []byte) (n int, err error) - 就符合 type Writer interface的要求，那 type File就也同時是 type Writer
- 例子
func main() { fmt.Println("Hello, playground") fmt.Fprintln(os.Stdout, "Hello, playground") io.WriteString(os.Stdout, "Hello, playground") } - End