Refactor VM and operators

internal/object/module.go

@@ -24,6 +24,20 @@ func (m Module) Inspect() string {
 	return fmt.Sprintf("<module '%s'>", m.Name)
 }
 
+func (m *Module) Get(index Object) (Object, error) {
+	key, ok := index.(Hashable)
+	if !ok {
+		return nil, fmt.Errorf("invalid module attribute %s", index.Type())
+	}
+
+	attr, found := m.Attrs.(*Hash).Pairs[key.HashKey()]
+	if !found {
+		return &Null{}, nil
+	}
+
+	return attr.Value, nil
+}
+
 func (m Module) Compare(other Object) int {
 	return 1
 }