map on array object and array of array.m,d

### ✅ You can use `map()` on:

1. **An array of values**  
2. **An array of objects**  
3. **An array of arrays**  
Basically, any array.

---

### 🔹 1. **Array of values**

```js
const numbers = [1, 2, 3];
const squared = numbers.map(num => num * num);
console.log(squared); // [1, 4, 9]
```

---

### 🔹 2. **Array of objects**

```js
const users = [
  { name: "Alice", age: 25 },
  { name: "Bob", age: 30 }
];
const names = users.map(user => user.name);
console.log(names); // ["Alice", "Bob"]
```

---

### 🔹 3. **Array of arrays**

```js
const matrix = [[1, 2], [3, 4]];
const doubled = matrix.map(arr => arr.map(x => x * 2));
console.log(doubled); // [[2, 4], [6, 8]]
```

---


<!-- Great! Here's a hands-on JavaScript exercise to help you practice both `map()` and `flatMap()`.

---

###  **Exercise: Get all comment texts from blog posts**

####  Given this data:

```js
const blogPosts = [
  {
    title: "Post 1",
    comments: [
      { user: "Alice", text: "Great post!" },
      { user: "Bob", text: "Thanks for sharing." }
    ]
  },
  {
    title: "Post 2",
    comments: [
      { user: "Charlie", text: "Interesting read." }
    ]
  }
];


const allEmployeeNames = blogPosts.flatMap(blog =>
  dblog.comments.map(t => t.nametext)
);

console.log(allEmployeeNames);
```

---

###  Task 1:
Use **`map()` + `flat()`** to get an array of **all comment texts**.

**Expected Output:**
```js

const allEmployeeNames = blogPosts.flatMap(blog =>
  blog.comments.map(t => t.text)
);

["Great post!", "Thanks for sharing.", "Interesting read."]
```