Hello,
why the method Read of rot13Reader run twice?
This is the code:
package main
import (
"fmt"
"io"
"os"
"strings"
)
type rot13Reader struct {
r io.Reader
}
var k int
func (rot *rot13Reader) Read(p []byte) (n int, err error) {
k++
n, err = rot.r.Read(p)
for i := 0; i < len(p); i++ {
if (p[i] >= 'A' && p[i] < 'N') || (p[i] >= 'a' && p[i] < 'n') {
p[i] += 13
} else if (p[i] > 'M' && p[i] <= 'Z') || (p[i] > 'm' && p[i] <=
'z') {
p[i] -= 13
}
}
return
}
func main() {
s := strings.NewReader("Lbh penpxrq gur pbqr!")
r := rot13Reader{s}
io.Copy(os.Stdout, &r)
fmt.Println("\n", k)
}
Why after the execution the k value is 2?
T.i.a
Franco
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