From d8e207464397aba9bb7ef1e6572d36606da0bdb0 Mon Sep 17 00:00:00 2001
From: Johannes Rieken <johannes.rieken@gmail.com>
Date: Tue, 3 Oct 2017 11:26:16 +0200
Subject: [PATCH] simplify arrays#flatten

---
 src/vs/base/common/arrays.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/vs/base/common/arrays.ts b/src/vs/base/common/arrays.ts
index 7cb942a84f8..b54372196a6 100644
--- a/src/vs/base/common/arrays.ts
+++ b/src/vs/base/common/arrays.ts
@@ -367,7 +367,7 @@ export function commonPrefixLength<T>(one: T[], other: T[], equals: (a: T, b: T)
 }
 
 export function flatten<T>(arr: T[][]): T[] {
-	return arr.reduce((r, v) => r.concat(v), []);
+	return [].concat(...arr);
 }
 
 export function range(to: number): number[];