Initial commit

fmt.go

@@ -0,0 +1,19 @@
+package scriptx
+
+import (
+	"fmt"
+	"io"
+)
+
+func Printf(ptrn string) func(r io.Reader, w io.Writer) error {
+	return func(r io.Reader, w io.Writer) error {
+		return eachLine(r, func(line string) error {
+			_, err := io.WriteString(w, fmt.Sprintf(ptrn, line))
+			if err != nil {
+				return err
+			}
+			_, err = w.Write([]byte{'\n'})
+			return err
+		})
+	}
+}