Completed unit tests and added README and LICENSE

json.go

@@ -0,0 +1,22 @@
+package scriptx
+
+import (
+	"encoding/json"
+	"io"
+)
+
+func ToJSON(fn func(line string) any) func(r io.Reader, w io.Writer) error {
+	return func(r io.Reader, w io.Writer) error {
+		return eachLine(r, func(line string) (err error) {
+			jsonBytes, err := json.Marshal(fn(line))
+			if err != nil {
+				return err
+			}
+			if _, err = w.Write(jsonBytes); err != nil {
+				return err
+			}
+			_, err = w.Write([]byte{'\n'})
+			return err
+		})
+	}
+}