diff --git a/array.go b/array.go
new file mode 100644
index 0000000..f1ef8f5
--- /dev/null
+++ b/array.go
@@ -0,0 +1,50 @@
+// Package util ...
+//
+// Description : util ...
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 2023-03-30 14:35
+package util
+
+import (
+	"fmt"
+	"reflect"
+)
+
+type array struct {
+}
+
+// In 判断指定数据是否在目标数据集中, 不存在返回 -1 , 存在时返回数据对应的索引
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 14:38 2023/3/30
+func (a *array) In(search interface{}, source interface{}) int {
+	if nil == source {
+		return -1
+	}
+	list, ok := source.([]interface{})
+	if !ok {
+		return -1
+	}
+	if nil == search {
+		for idx, item := range list {
+			if item == nil {
+				return idx
+			}
+		}
+		return -1
+	}
+	searchType := reflect.TypeOf(search).Kind()
+	for idx, item := range list {
+		if searchType != reflect.TypeOf(item).Kind() {
+			// 类型不同
+			continue
+		}
+		if fmt.Sprintf("%v", search) == fmt.Sprintf("%v", item) {
+			return idx
+		}
+	}
+	return -1
+}
diff --git a/array_test.go b/array_test.go
new file mode 100644
index 0000000..dd4d604
--- /dev/null
+++ b/array_test.go
@@ -0,0 +1,20 @@
+// Package util ...
+//
+// Description : util ...
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 2023-03-30 14:43
+package util
+
+import (
+	"fmt"
+	"testing"
+)
+
+func Test_array_In(t *testing.T) {
+	fmt.Println(Array.In(1234, []string{"1234", "123", "1"}))
+	fmt.Println(Array.In(1234, []interface{}{1234, "123", "1"}))
+	fmt.Println(Array.In(nil, []interface{}{1234, "123", "1"}))
+	fmt.Println(Array.In(nil, []interface{}{1234, "123", "1", nil}))
+}
diff --git a/init.go b/init.go
index 7f78400..50a808a 100644
--- a/init.go
+++ b/init.go
@@ -31,7 +31,9 @@ var (
 	// Calculate ...
 	Calculate *calculate
 	// Project ...
-	Project = &project{}
+	Project *project
+	// 数组操作
+	Array *array
 )
 
 func init() {
@@ -46,4 +48,6 @@ func init() {
 	URL = &ownURL{}
 	Map = &ownMap{}
 	Calculate = &calculate{}
+	Project = &project{}
+	Array = &array{}
 }