How to cast to an array of objects?

Question

In CourseViewController I have the following variable:

var courses =  [Course]()

declared at top

I try to segue to CourseViewController, by doing this

   let dc = segue.destination as! CourseListViewController
   dc.courses = items[tag] as! [Course]

Is that the right way to do so? "items[tag] as! [Course]" is this correct?

"is this correct?" Did you try running your code? Did your code work? If it did, your code is correct. — Sweeper
– Sweeper, Commented Feb 12, 2020 at 7:42

The Pedestrian · Accepted Answer · 2020-02-12 07:51:40Z

1

If you're sure that the item at that tag would surely be a [Course] then it's absolutely correct. If not, use an if-let or guard to avoid runtime exception

 if let courses = items[tag] as? [Course]{
    dc.courses = courses
 }

answered Feb 12, 2020 at 7:51

The Pedestrian

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