diff --git a/TypeScript/app/gilded-rose.ts b/TypeScript/app/gilded-rose.ts
index 928aa579..8e56e02d 100644
--- a/TypeScript/app/gilded-rose.ts
+++ b/TypeScript/app/gilded-rose.ts
@@ -18,52 +18,54 @@ export class GildedRose {
     }
 
     updateQuality() {
-        for (let i = 0; i < this.items.length; i++) {
-            if (this.items[i].name != 'Aged Brie' && this.items[i].name != 'Backstage passes to a TAFKAL80ETC concert') {
-                if (this.items[i].quality > 0) {
-                    if (this.items[i].name != 'Sulfuras, Hand of Ragnaros') {
-                        this.items[i].quality = this.items[i].quality - 1
-                    }
-                }
-            } else {
-                if (this.items[i].quality < 50) {
-                    this.items[i].quality = this.items[i].quality + 1
-                    if (this.items[i].name == 'Backstage passes to a TAFKAL80ETC concert') {
-                        if (this.items[i].sellIn < 11) {
-                            if (this.items[i].quality < 50) {
-                                this.items[i].quality = this.items[i].quality + 1
-                            }
-                        }
-                        if (this.items[i].sellIn < 6) {
-                            if (this.items[i].quality < 50) {
-                                this.items[i].quality = this.items[i].quality + 1
-                            }
-                        }
-                    }
+        this.items.map(this.updateItemQuality);
+        return this.items;
+    }
+
+    private updateItemQuality(item) {
+        if (item.name != 'Aged Brie' && item.name != 'Backstage passes to a TAFKAL80ETC concert') {
+            if (item.quality > 0) {
+                if (item.name != 'Sulfuras, Hand of Ragnaros') {
+                    item.quality = item.quality - 1
                 }
             }
-            if (this.items[i].name != 'Sulfuras, Hand of Ragnaros') {
-                this.items[i].sellIn = this.items[i].sellIn - 1;
-            }
-            if (this.items[i].sellIn < 0) {
-                if (this.items[i].name != 'Aged Brie') {
-                    if (this.items[i].name != 'Backstage passes to a TAFKAL80ETC concert') {
-                        if (this.items[i].quality > 0) {
-                            if (this.items[i].name != 'Sulfuras, Hand of Ragnaros') {
-                                this.items[i].quality = this.items[i].quality - 1
-                            }
+        } else {
+            if (item.quality < 50) {
+                item.quality = item.quality + 1
+                if (item.name == 'Backstage passes to a TAFKAL80ETC concert') {
+                    if (item.sellIn < 11) {
+                        if (item.quality < 50) {
+                            item.quality = item.quality + 1
                         }
-                    } else {
-                        this.items[i].quality = this.items[i].quality - this.items[i].quality
                     }
-                } else {
-                    if (this.items[i].quality < 50) {
-                        this.items[i].quality = this.items[i].quality + 1
+                    if (item.sellIn < 6) {
+                        if (item.quality < 50) {
+                            item.quality = item.quality + 1
+                        }
                     }
                 }
             }
         }
-
-        return this.items;
+        if (item.name != 'Sulfuras, Hand of Ragnaros') {
+            item.sellIn = item.sellIn - 1;
+        }
+        if (item.sellIn < 0) {
+            if (item.name != 'Aged Brie') {
+                if (item.name != 'Backstage passes to a TAFKAL80ETC concert') {
+                    if (item.quality > 0) {
+                        if (item.name != 'Sulfuras, Hand of Ragnaros') {
+                            item.quality = item.quality - 1
+                        }
+                    }
+                } else {
+                    item.quality = item.quality - item.quality
+                }
+            } else {
+                if (item.quality < 50) {
+                    item.quality = item.quality + 1
+                }
+            }
+        }
+        return item;
     }
 }