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add: notes to io ifaces

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This commit is contained in:
Inanc Gumus
2019-11-04 11:00:53 +03:00
parent ead2341124
commit b99fae8873
1 changed files with 3 additions and 0 deletions
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3
interfaces/13-io/main.go
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@ -49,6 +49,8 @@ func main() {
} }
} }
// ioCopy streams from a file to another file.
// we use it to stream from the standard input to ouput.
func ioCopy(dst, src *os.File) error { func ioCopy(dst, src *os.File) error {
// Use a fixed-length buffer to efficiently read from src stream in chunks. // Use a fixed-length buffer to efficiently read from src stream in chunks.
buf := make([]byte, 32768) buf := make([]byte, 32768)
@ -76,6 +78,7 @@ func ioCopy(dst, src *os.File) error {
return nil return nil
} }
// write method example.
func write(dst *os.File, buf []byte) error { func write(dst *os.File, buf []byte) error {
nw, ew := dst.Write(buf) nw, ew := dst.Write(buf)