From f30509cf99f24b43ea1f9d3af219a373825531af Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tom=C3=A1=C5=A1=20Livora?= <livoratom@gmail.com>
Date: Sun, 4 Feb 2018 14:32:14 +0100
Subject: [PATCH] fix(Entity): Do not store null entity keys

---
 modules/entity/src/unsorted_state_adapter.ts | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/modules/entity/src/unsorted_state_adapter.ts b/modules/entity/src/unsorted_state_adapter.ts
index dcf1d53214..72f12585b3 100644
--- a/modules/entity/src/unsorted_state_adapter.ts
+++ b/modules/entity/src/unsorted_state_adapter.ts
@@ -25,9 +25,8 @@ export function createUnsortedStateAdapter<T>(selectId: IdSelector<T>): any {
   function addManyMutably(entities: any[], state: any): DidMutate {
     let didMutate = false;
 
-    for (let index in entities) {
-      didMutate =
-        addOneMutably(entities[index], state) !== DidMutate.None || didMutate;
+    for (const entity of entities) {
+      didMutate = addOneMutably(entity, state) !== DidMutate.None || didMutate;
     }
 
     return didMutate ? DidMutate.Both : DidMutate.None;