How to Print Array in Label?

Question

I'm trying to print my Array into my label but I don't found any way to do that.

Here is my array.

var lapTime: [[Double]] = [[]]

And there is where I put something of cool in my label

let str = NSString(format: "%.2f", rows[indexPath.row]["time"]! as! Double)
let arr = ??? // Here I Want to put my array
cell?.textLabel?.text = "\(indexPath.row + 1) -> \(str) -> \(arr)"

Thank you for your help !

Answer 1

I assumed your lapTime is like below,

 let lapTime: [[Double]] = [[33.34,22.876,34.0]]

Method 1:

let arr = lapTime[0].map { (double) -> String in
    return String(double)
}.joined()

self.label.text = arr

or

let arr = lapTime[0].map { (double) -> String in
            return String(double)
            }.joined(separator: ", ")

self.label.text = arr

Method 2:

for time in lapTime[0]{
    let arr  = (self.label.text ?? "")+" "+String(time) //+"<space>"+ to +","+ if you need lap times are comma separated. 
    self.label.text = arr
}

Note:

The lapTime == [[33.34,22.876,34.0],[33.34,22.876,34.0]]and you had a UITableView, then replace lapTime[0] to lapTime[indexPath.row].

let me know is that you need.

Output: