From 36757aefa0d32fad99e5395de7e8b52dece11e97 Mon Sep 17 00:00:00 2001
From: iapyang <yklorse@gmail.com>
Date: Wed, 13 Nov 2019 15:22:18 +0800
Subject: [PATCH] =?UTF-8?q?refactor:=20=E4=BF=AE=E6=94=B9=E8=AF=B4?=
 =?UTF-8?q?=E6=98=8E?=
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---
 typescript/core/base.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/typescript/core/base.ts b/typescript/core/base.ts
index b6d7e795d..e8ecfc3f0 100644
--- a/typescript/core/base.ts
+++ b/typescript/core/base.ts
@@ -40,7 +40,7 @@ export interface _base {
 
     each: <T>(collection: T[]|object|string, callback?: ((index: number, value: T) => void)|object|string, thisArg?: any) => any;
 
-    map: <T, U>(collection: T[]|object|string, callback?: ((index: number, value: T) => U)|object|string, thisArg?: any) => U[];
+    map: <T, U>(collection: T[]|object|string|null|undefined, callback?: ((index: number, value: T) => U)|object|string, thisArg?: any) => U[];
 
     reduce: <T, U>(collection: T[]|object|string, callback?: ((total: U extends T ? U : T, currentValue: T, currentIndex: number) => U extends T ? U : T)|object|string, initialValue?: U|T) => U extends T ? U : T;