diff --git a/typescript/core/func/array.ts b/typescript/core/func/array.ts
new file mode 100644
index 000000000..c69fa3ccb
--- /dev/null
+++ b/typescript/core/func/array.ts
@@ -0,0 +1,5 @@
+export declare type _pushArray = (sArray: any[], array: any[]) => void;
+
+export declare type _pushDistinct = (sArray: any[], obj: any) => void;
+
+export declare type _pushDistinctArray = (sArray: any[], array: any[]) => void;
\ No newline at end of file
diff --git a/typescript/index.ts b/typescript/index.ts
index ec8222707..95723ce61 100644
--- a/typescript/index.ts
+++ b/typescript/index.ts
@@ -1,5 +1,6 @@
 import { _addI18n, _i18nText } from "./core/i18n";
 import { _OB } from "./core/ob";
+import { _pushArray, _pushDistinct, _pushDistinctArray} from "./core/func/array";
 
 export declare module BI {
     namespace i18n {
@@ -8,4 +9,8 @@ export declare module BI {
     }
 
     const OB: _OB;
+    
+    const pushArray: _pushArray;
+    const pushDistinct: _pushDistinct;
+    const pushDistinctArray: _pushDistinctArray;
 }