gaspersic/learngo
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

refactor: constants io reusable iface

Browse Source
This commit is contained in:
Inanc Gumus
2019-11-04 12:09:15 +03:00
parent c41fdc301c
commit acbec476c3
1 changed files with 9 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
interfaces/14-io-reusable/main.go
View File

@ -16,12 +16,15 @@ import (
"os"
)
func main() {
// you can download the rosie.unknown image in the link:
// https://inancgumus.github.com/x/rosie.unknown
// you can download the rosie.unknown image in the link:
// https://inancgumus.github.com/x/rosie.unknown
// then feed the file to the standard input of this program:
// go run . < rosie.unknown
// then feed the file to the standard input of this program:
// go run . < rosie.unknown
func main() {
const pngSign = "\x89PNG\r\n\x1a\n"
const pngSignLen = 8
// create an in-memory buffer (bytes.Buffer is an io.Reader and an io.Writer).
memory := bytes.Buffer{}
@ -36,9 +39,8 @@ func main() {
buf := memory.Bytes()
// print the first eight bytes.
fmt.Printf("% x\n", buf[:8])
fmt.Printf("% x\n", buf[:pngSignLen])
// compare it with the png signature.
const pngSign = "\x89PNG\r\n\x1a\n"
fmt.Printf("% x\n", pngSign)
}