From 96f23ab57136d452cdb3a9d3ce0ec64aa7d256f6 Mon Sep 17 00:00:00 2001
From: Simon Lindh <simonlindh.se@gmail.com>
Date: Mon, 20 Feb 2017 23:11:27 +0100
Subject: [PATCH] Avoid errors when running in strictNullChecks mode. (#29)

---
 src/app/pipes/helpers/helpers.ts  | 2 +-
 src/app/pipes/object/invert-by.ts | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/app/pipes/helpers/helpers.ts b/src/app/pipes/helpers/helpers.ts
index 223c1a44..c33a0778 100644
--- a/src/app/pipes/helpers/helpers.ts
+++ b/src/app/pipes/helpers/helpers.ts
@@ -36,5 +36,5 @@ export function extractDeepPropertyByMapKey(obj: any, map: string): any {
     return !isUndefined(prop) && !isUndefined(prop[key])
       ? prop[key]
       : undefined;
-  }, obj[key]);
+  }, obj[key || '']);
 }
diff --git a/src/app/pipes/object/invert-by.ts b/src/app/pipes/object/invert-by.ts
index 3bba3fe2..d71ae54b 100644
--- a/src/app/pipes/object/invert-by.ts
+++ b/src/app/pipes/object/invert-by.ts
@@ -4,7 +4,7 @@ import {isObject} from '../helpers/helpers';
 @Pipe({name: 'invertBy'})
 export class InvertByPipe implements PipeTransform {
 
-  transform(obj: any, cb: Function = null): Object {
+  transform(obj: any, cb?: Function): Object {
     if (Array.isArray(obj) || !isObject(obj)) {
       return obj;
     }