Please check tasks

JavaScript/Tasks/1-thenable.js

@@ -2,19 +2,21 @@
 
 // Task: change `iterate` contract from callbacks to Thenable
 
-const iterate = (items, callback) => {
-  for (const item of items) {
-    callback(item);
-  }
-};
+const iterate = (items) => ({
+  then(resolve) {
+    for (const item of items) {
+      resolve(item);
+    }
+  },
+});
 
 const electronics = [
   { name: 'Laptop', price: 1500 },
   { name: 'Keyboard', price: 100 },
   { name: 'HDMI cable', price: 10 },
 ];
 
-// Use await syntax to get items
-iterate(electronics, (item) => {
-  console.log(item);
-});
+iterate(electronics).then(item=>console.log(item))
+
+
+

JavaScript/Tasks/2-reject.js

@@ -5,10 +5,12 @@
 const iterate = (items) => {
   let index = 0;
   return {
-    then(fulfill /*reject*/) {
+    then(fulfill, reject) {
       // Call both: fulfill and reject
       if (index < items.length) {
         fulfill(items[index++]);
+      } else {
+        reject(new Error('No items'))
       }
     },
   };

JavaScript/Tasks/3-class.js

@@ -3,16 +3,21 @@
 // Task: rewrite to `class Iterator` implementing
 // Thenable contract with private fields.
 
-const iterate = (items) => {
-  let index = 0;
-  return {
-    then(fulfill /*reject*/) {
-      if (index < items.length) {
-        fulfill(items[index++]);
+class Iterator {
+  #items;
+  constructor(items){
+    this.#items = items;
+  }
+
+  then(fulfill /*reject*/) {
+      const item = this.#items.shift()
+      if (item) {
+        fulfill(item);
       }
-    },
-  };
-};
+   }
+}
+
+
 
 const electronics = [
   { name: 'Laptop', price: 1500 },
@@ -21,7 +26,7 @@ const electronics = [
 ];
 
 (async () => {
-  const items = iterate(electronics);
+  const items = new Iterator(electronics);
   // Use `new Iterator(electronics)`
   const item1 = await items;
   console.log(item1);