added js version of Gilded Rose from git@github.com:guyroyse/gilded-rose-javascript.git

GildedRose/js/src/gilded_rose.js

@@ -0,0 +1,62 @@
+function Item(name, sell_in, quality) {
+  this.name = name;
+  this.sell_in = sell_in;
+  this.quality = quality;
+}
+
+var items = []
+
+items.push(new Item('+5 Dexterity Vest', 10, 20));
+items.push(new Item('Aged Brie', 2, 0));
+items.push(new Item('Elixir of the Mongoose', 5, 7));
+items.push(new Item('Sulfuras, Hand of Ragnaros', 0, 80));
+items.push(new Item('Backstage passes to a TAFKAL80ETC concert', 15, 20));
+items.push(new Item('Conjured Mana Cake', 3, 6));
+
+function update_quality() {
+  for (var i = 0; i < items.length; i++) {
+    if (items[i].name != 'Aged Brie' && items[i].name != 'Backstage passes to a TAFKAL80ETC concert') {
+      if (items[i].quality > 0) {
+        if (items[i].name != 'Sulfuras, Hand of Ragnaros') {
+          items[i].quality = items[i].quality - 1
+        }
+      }
+    } else {
+      if (items[i].quality < 50) {
+        items[i].quality = items[i].quality + 1
+        if (items[i].name == 'Backstage passes to a TAFKAL80ETC concert') {
+          if (items[i].sell_in < 11) {
+            if (items[i].quality < 50) {
+              items[i].quality = items[i].quality + 1
+            }
+          }
+          if (items[i].sell_in < 6) {
+            if (items[i].quality < 50) {
+              items[i].quality = items[i].quality + 1
+            }
+          }
+        }
+      }
+    }
+    if (items[i].name != 'Sulfuras, Hand of Ragnaros') {
+      items[i].sell_in = items[i].sell_in - 1;
+    }
+    if (items[i].sell_in < 0) {
+      if (items[i].name != 'Aged Brie') {
+        if (items[i].name != 'Backstage passes to a TAFKAL80ETC concert') {
+          if (items[i].quality > 0) {
+            if (items[i].name != 'Sulfuras, Hand of Ragnaros') {
+              items[i].quality = items[i].quality - 1
+            }
+          }
+        } else {
+          items[i].quality = items[i].quality - items[i].quality
+        }
+      } else {
+        if (items[i].quality < 50) {
+          items[i].quality = items[i].quality + 1
+        }
+      }
+    }
+  }
+}