Sync

tour_of_go/l5/ex-reader/exercise-reader.go

@@ -0,0 +1,16 @@
+package main
+
+import "golang.org/x/tour/reader"
+
+type MyReader struct{}
+
+func (r MyReader) Read(b []byte) (int, error) {
+	for i := range(b) {
+		b[i] = 'A'
+	}
+	return len(b), nil
+}
+
+func main() {
+	reader.Validate(MyReader{})
+}

tour_of_go/l5/ex-reader/exercise-rot-reader.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"io"
+	"os"
+	"strings"
+)
+
+type rot13Reader struct {
+	r io.Reader
+}
+
+func (r rot13Reader) Read(b []byte) (int, error) {
+	n, err := r.r.Read(b)
+	for i := 0; i < n; i++ {
+		switch {
+		case 'A' <= b[i] && 'Z' >= b[i]:
+			b[i] = 'A' + (b[i]-'A'+13)%26
+		case 'a' <= b[i] && 'z' >= b[i]:
+			b[i] = 'a' + (b[i]-'a'+13)%26
+		}
+	}
+	return n, err
+}
+
+func main() {
+	s := strings.NewReader("Lbh penpxrq gur pbqr!")
+	r := rot13Reader{s}
+	io.Copy(os.Stdout, &r)
+}

tour_of_go/l5/ex-reader/go.mod

@@ -0,0 +1,5 @@
+module exercies-reader.go
+
+go 1.24.5
+
+require golang.org/x/tour v0.1.0

tour_of_go/l5/ex-reader/go.sum

@@ -0,0 +1,2 @@
+golang.org/x/tour v0.1.0 h1:OWzbINRoGf1wwBhKdFDpYwM88NM0d1SL/Nj6PagS6YE=
+golang.org/x/tour v0.1.0/go.mod h1:DUZC6G8mR1AXgXy73r8qt/G5RsefKIlSj6jBMc8b9Wc=