From db7bf0817e8495dc3974af2a972f3d3f357a4a18 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=99=BD=E8=8C=B6=E6=B8=85=E6=AC=A2?=
 <go_developer@163.com>
Date: Tue, 19 Nov 2024 15:28:47 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0Map=E4=B8=BANil=E5=88=A4?=
 =?UTF-8?q?=E6=96=AD?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 map.go      | 37 ++++++++++++++++++++++++++++++++-----
 map_test.go |  9 +++++++++
 2 files changed, 41 insertions(+), 5 deletions(-)

diff --git a/map.go b/map.go
index 6de1fd3..46145c4 100644
--- a/map.go
+++ b/map.go
@@ -9,6 +9,7 @@ package wrapper
 
 import (
 	"errors"
+	"reflect"
 	"sync"
 )
 
@@ -38,7 +39,7 @@ func (m *Map) rUnlock() {
 //
 // Date : 18:34 2024/11/6
 func (m *Map) Exist(key string) bool {
-	if nil == m {
+	if m.IsNil() {
 		return false
 	}
 	m.rLock()
@@ -58,7 +59,7 @@ func (m *Map) Exist(key string) bool {
 //
 // Date : 15:16 2024/11/19
 func (m *Map) Set(field string, value any) error {
-	if nil == m {
+	if m.IsNil() {
 		return errors.New("Map is nil")
 	}
 	m.lock()
@@ -67,13 +68,39 @@ func (m *Map) Set(field string, value any) error {
 	return nil
 }
 
+// Del 删除指定的字段
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 15:21 2024/11/19
+func (m *Map) Del(field string) {
+	if m.IsNil() {
+		return
+	}
+	m.lock()
+	defer m.unlock()
+	delete(*m, field)
+}
+
+// IsNil 判断map是否为nil
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 15:22 2024/11/19
+func (m *Map) IsNil() bool {
+	if nil == m {
+		return true
+	}
+	return reflect.ValueOf(*m).IsNil()
+}
+
 // Get ...
 //
 // Author : go_developer@163.com<白茶清欢>
 //
 // Date : 14:41 2024/11/19
 func (m *Map) Get(field string) (any, error) {
-	if nil == m {
+	if m.IsNil() {
 		return nil, errors.New("map is nil")
 	}
 	m.rLock()
@@ -97,7 +124,7 @@ func (m *Map) Get(field string) (any, error) {
 //
 // Date : 14:59 2024/11/19
 func (m *Map) GetDefault(field string, defaultValue any, allowNil bool) any {
-	if nil == m {
+	if m.IsNil() {
 		return defaultValue
 	}
 	m.rLock()
@@ -135,7 +162,7 @@ func (m *Map) Value() Map {
 // Date : 19:40 2024/11/6
 func (m *Map) Clone() Map {
 	newData := map[string]any{}
-	if nil == m {
+	if m.IsNil() {
 		return newData
 	}
 	m.rLock()
diff --git a/map_test.go b/map_test.go
index b5e022e..e57cc26 100644
--- a/map_test.go
+++ b/map_test.go
@@ -19,3 +19,12 @@ func TestMap_Exist(t *testing.T) {
 	fmt.Println(testData.Exist("name"))
 	fmt.Println(testData.Exist("age"))
 }
+
+func TestMap_IsNil(t *testing.T) {
+	var (
+		m  Map
+		m1 *Map
+	)
+	fmt.Println(m.Set("a", 1))
+	fmt.Println(m.IsNil(), m1.IsNil())
+}