From 72ded7b4edbe7fe1cec7090b3c527ec105bf9657 Mon Sep 17 00:00:00 2001
From: OJ Kwon <kwon.ohjoong@gmail.com>
Date: Wed, 21 Feb 2018 09:12:23 -0800
Subject: [PATCH] fix(toArray): do not mutate array per subscription

---
 src/operators/toArray.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/operators/toArray.ts b/src/operators/toArray.ts
index 3b11ffe27d..2148ad3e80 100644
--- a/src/operators/toArray.ts
+++ b/src/operators/toArray.ts
@@ -2,6 +2,9 @@ import { reduce } from './reduce';
 import { OperatorFunction } from '../interfaces';
 
 function toArrayReducer<T>(arr: T[], item: T, index: number) {
+  if (index === 0) {
+    return [item];
+  }
   arr.push(item);
   return arr;
 }