diff --git a/ex-beyond/src/map.go b/ex-beyond/src/map.go
index 86c6c19..f112427 100644
--- a/ex-beyond/src/map.go
+++ b/ex-beyond/src/map.go
@@ -1,32 +1,33 @@
 package main
+
 import "fmt"
 
-/* define the empty interface as a type */
+//* define the empty interface as a type
 type e interface{}
 
 func mult2(f e) e {
-    switch f.(type) {
-    case int:
-        return f.(int) * 2
-    case string:
-        return f.(string) + f.(string) + f.(string) + f.(string)
-    }
-    return f
+	switch f.(type) {
+	case int:
+		return f.(int) * 2
+	case string:
+		return f.(string) + f.(string) + f.(string) + f.(string)
+	}
+	return f
 }
 
 func Map(n []e, f func(e) e) []e {
-    m := make([]e, len(n))
-    for k, v := range n {
-        m[k] = f(v)
-    }
-    return m
+	m := make([]e, len(n))
+	for k, v := range n {
+		m[k] = f(v)
+	}
+	return m
 }
 
 func main() {
-    m := []e{1, 2, 3, 4}
-    s := []e{"a", "b", "c", "d"}
-    mf := Map(m, mult2)
-    sf := Map(s, mult2)
-    fmt.Printf("%v\n", mf)
-    fmt.Printf("%v\n", sf)
+	m := []e{1, 2, 3, 4}
+	s := []e{"a", "b", "c", "d"}
+	mf := Map(m, mult2)
+	sf := Map(s, mult2)
+	fmt.Printf("%v\n", mf)
+	fmt.Printf("%v\n", sf)
 }