walk: deal with array

walk/walk.go

@@ -16,7 +16,7 @@ func Walk(x interface{}, fn func(string)) {
 	case reflect.Struct:
 		numberOfValues = val.NumField()
 		getField = val.Field
-	case reflect.Slice:
+	case reflect.Slice, reflect.Array:
 		numberOfValues = val.Len()
 		getField = val.Index
 	}

walk/walk_test.go

@@ -62,6 +62,14 @@ func TestWalk(t *testing.T) {
 			},
 			[]string{"London", "Paris"},
 		},
+		{
+			"arrays",
+			[2]Profile{
+				{29, "London"},
+				{33, "Paris"},
+			},
+			[]string{"London", "Paris"},
+		},
 	}
 
 	for _, test := range cases {