From 8d1dbedb38bb717e22c9d3fd8ad5306100df5611 Mon Sep 17 00:00:00 2001
From: cbartondock <cbartondock@gmail.com>
Date: Mon, 22 Jun 2020 09:28:35 -0400
Subject: [PATCH] safely reduce in get all categories

---
 src/renderer/services/preview.service.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/renderer/services/preview.service.ts b/src/renderer/services/preview.service.ts
index 8b637628e3..c3d0a9a179 100644
--- a/src/renderer/services/preview.service.ts
+++ b/src/renderer/services/preview.service.ts
@@ -368,7 +368,8 @@ export class PreviewService {
   }
 
   getAllCategories() {
-    return this.previewData ? Object.entries(this.previewData).map(dir=>Object.entries(dir[1]).map(user=>Object.entries(user[1].apps).map(app=>app[1].steamCategories).reduce((x,y)=>_.union(x,y))).reduce((x,y)=>_.union(x,y))).reduce((x,y)=>_.union(x,y)) : [];
+    const union = (x: string[],y: string[])=>_.union(x,y);
+    return this.previewData ? Object.entries(this.previewData).map(dir=>Object.entries(dir[1]).map(user=>Object.entries(user[1].apps).map(app=>app[1].steamCategories).reduce(union,[])).reduce(union,[])).reduce(union,[]) : [];
   }
 
   private clearImageCache(settingsOnly: boolean) {