Guys I get this error 

> 
> Variable courseTitle was never mutated
> 
> 
> 

while trying to use the '**dequeueReusableCellWithIdentifier**'.

Here is my code:

```
import UIKit

class ViewController: UIViewController, UITableViewDataSource {

    let devCourses = [("iOS App Dev with Swift Essential Training","Simon Allardice"),
        ("iOS 8 SDK New Features","Lee Brimelow"),
        ("Data Visualization with D3.js","Ray Villalobos"),
        ("Swift Essential Training","Simon Allardice"),
        ("Up and Running with AngularJS","Ray Villalobos"),
        ("MySQL Essential Training","Bill Weinman"),
        ("Building Adaptive Android Apps with Fragments","David Gassner"),
        ("Advanced Unity 3D Game Programming","Michael House"),
        ("Up and Running with Ubuntu Desktop Linux","Scott Simpson"),
        ("Up and Running with C","Dan Gookin")]

    func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 1
    }

    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return devCourses.count
    }

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
        {

            let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as UITableViewCell

            var (courseTitle, courseAuthor) = devCourses[indexPath.row]

            cell.textLabel?.text = courseTitle
            return cell

        }

```

Any ideas?