step3 --- clean up

gildedRose/src/gilded-rose.js

@@ -8,55 +8,55 @@ export class GildedRose {
   
 
   update_quality() {
-    for (let i = 0; i < this.items.length; i++) {
+    for (const item of this.items) {
       if (
-        this.items[i].name != 'Aged Brie' &&
-        this.items[i].name != 'Backstage passes to a TAFKAL80ETC concert'
+        item.name != 'Aged Brie' &&
+        item.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
+        if (item.quality > 0) {
+          if (item.name != 'Sulfuras, Hand of Ragnaros') {
+            item.quality = item.quality - 1
           }
         }
       } else {
-        if (this.items[i].quality < 50) {
-          this.items[i].quality = this.items[i].quality + 1
+        if (item.quality < 50) {
+          item.quality = item.quality + 1
           if (
-            this.items[i].name == 'Backstage passes to a TAFKAL80ETC concert'
+            item.name == 'Backstage passes to a TAFKAL80ETC concert'
           ) {
-            if (this.items[i].sell_in < 11) {
-              if (this.items[i].quality < 50) {
-                this.items[i].quality = this.items[i].quality + 1
+            if (item.sell_in < 11) {
+              if (item.quality < 50) {
+                item.quality = item.quality + 1
               }
             }
-            if (this.items[i].sell_in < 6) {
-              if (this.items[i].quality < 50) {
-                this.items[i].quality = this.items[i].quality + 1
+            if (item.sell_in < 6) {
+              if (item.quality < 50) {
+                item.quality = item.quality + 1
               }
             }
           }
         }
       }
-      if (this.items[i].name != 'Sulfuras, Hand of Ragnaros') {
-        this.items[i].sell_in = this.items[i].sell_in - 1
+      if (item.name != 'Sulfuras, Hand of Ragnaros') {
+        item.sell_in = item.sell_in - 1
       }
-      if (this.items[i].sell_in < 0) {
-        if (this.items[i].name != 'Aged Brie') {
+      if (item.sell_in < 0) {
+        if (item.name != 'Aged Brie') {
           if (
-            this.items[i].name != 'Backstage passes to a TAFKAL80ETC concert'
+            item.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
+            if (item.quality > 0) {
+              if (item.name != 'Sulfuras, Hand of Ragnaros') {
+                item.quality = item.quality - 1
               }
             }
           } else {
-            this.items[i].quality =
-              this.items[i].quality - this.items[i].quality
+            item.quality =
+              item.quality - item.quality
           }
         } else {
-          if (this.items[i].quality < 50) {
-            this.items[i].quality = this.items[i].quality + 1
+          if (item.quality < 50) {
+            item.quality = item.quality + 1
           }
         }
       }