code style simplify

@@ -29,13 +29,13 @@ func (js *JsonConfig) Parse(filename string) (ConfigContainer, error) {
 		return nil, err
 	}
 	defer file.Close()
-	x := &JsonConfigContainer{
-		data: make(map[string]interface{}),
-	}
 	content, err := ioutil.ReadAll(file)
 	if err != nil {
 		return nil, err
 	}
+	x := &JsonConfigContainer{
+		data: make(map[string]interface{}),
+	}
 	err = json.Unmarshal(content, &x.data)
 	if err != nil {
 		var wrappingArray []interface{}
@@ -61,12 +61,10 @@ func (c *JsonConfigContainer) Bool(key string) (bool, error) {
 	if val != nil {
 		if v, ok := val.(bool); ok {
 			return v, nil
-		} else {
-			return false, errors.New("not bool value")
 		}
-	} else {
-		return false, errors.New("not exist key:" + key)
+		return false, errors.New("not bool value")
 	}
+	return false, errors.New("not exist key:" + key)
 }
 
 // Int returns the integer value for a given key.
@@ -75,12 +73,10 @@ func (c *JsonConfigContainer) Int(key string) (int, error) {
 	if val != nil {
 		if v, ok := val.(float64); ok {
 			return int(v), nil
-		} else {
-			return 0, errors.New("not int value")
 		}
-	} else {
-		return 0, errors.New("not exist key:" + key)
+		return 0, errors.New("not int value")
 	}
+	return 0, errors.New("not exist key:" + key)
 }
 
 // Int64 returns the int64 value for a given key.
@@ -89,12 +85,10 @@ func (c *JsonConfigContainer) Int64(key string) (int64, error) {
 	if val != nil {
 		if v, ok := val.(float64); ok {
 			return int64(v), nil
-		} else {
-			return 0, errors.New("not int64 value")
 		}
-	} else {
-		return 0, errors.New("not exist key:" + key)
+		return 0, errors.New("not int64 value")
 	}
+	return 0, errors.New("not exist key:" + key)
 }
 
 // Float returns the float value for a given key.
@@ -103,12 +97,10 @@ func (c *JsonConfigContainer) Float(key string) (float64, error) {
 	if val != nil {
 		if v, ok := val.(float64); ok {
 			return v, nil
-		} else {
-			return 0.0, errors.New("not float64 value")
 		}
-	} else {
-		return 0.0, errors.New("not exist key:" + key)
+		return 0.0, errors.New("not float64 value")
 	}
+	return 0.0, errors.New("not exist key:" + key)
 }
 
 // String returns the string value for a given key.
@@ -117,12 +109,9 @@ func (c *JsonConfigContainer) String(key string) string {
 	if val != nil {
 		if v, ok := val.(string); ok {
 			return v
-		} else {
-			return ""
 		}
-	} else {
-		return ""
 	}
+	return ""
 }
 
 // Strings returns the []string value for a given key.
@@ -143,9 +132,8 @@ func (c *JsonConfigContainer) DIY(key string) (v interface{}, err error) {
 	val := c.getdata(key)
 	if val != nil {
 		return val, nil
-	} else {
-		return nil, errors.New("not exist key")
 	}
+	return nil, errors.New("not exist key")
 }
 
 // section.key or key
@@ -155,24 +143,21 @@ func (c *JsonConfigContainer) getdata(key string) interface{} {
 	if len(key) == 0 {
 		return nil
 	}
-	sectionkey := strings.Split(key, "::")
-	if len(sectionkey) >= 2 {
-		cruval, ok := c.data[sectionkey[0]]
-		if !ok {
-			return nil
-		}
-		for _, key := range sectionkey[1:] {
-			if v, ok := cruval.(map[string]interface{}); !ok {
-				return nil
-			} else if cruval, ok = v[key]; !ok {
-				return nil
+	sectionKey := strings.Split(key, "::")
+	if len(sectionKey) >= 2 {
+		if curValue, ok := c.data[sectionKey[0]]; ok {
+			for _, key := range sectionKey[1:] {
+				if v, ok := curValue.(map[string]interface{}); ok {
+					if v2, ok := v[key]; ok {
+						return v2
+					}
+				}
 			}
 		}
-		return cruval
-	} else {
-		if v, ok := c.data[key]; ok {
-			return v
-		}
+		return nil
+	}
+	if v, ok := c.data[key]; ok {
+		return v
 	}
 	return nil
 }