//

class TestTableViewController: UITableViewController {
	
	var myData: [Int] = []
	
	override func viewDidLoad() {
		super.viewDidLoad()
		
		// fill myData with 1000, 1100, 1200, 1300, 1400
		myData = (0..<5).map { 1000 + ($0 * 100)  }
		
		tableView.register(UITableViewCell.self, forCellReuseIdentifier: "c")
	}
	override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
		return myData.count
	}
	override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
		// output the row and the data for that row
		print("r:\t", indexPath.row, "\t", myData[indexPath.row], "\tin cellForRowAt")
		
		let c = tableView.dequeueReusableCell(withIdentifier: "c", for: indexPath)
		c.textLabel?.text = "\(myData[indexPath.row])"
		return c
	}
	override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
		self.myReload()
	}
	
	func myReload() {
		
		print()
		print("on entry to myReload(), myData is")
		print()
		
		// output the updated data
		print(myData)
		
		print()
		print("now call .reloadData()")
		
		// call .reloadData here
		tableView.reloadData()
		
		print()
		print("now modify data")
		print()
		
		for i in 0..<myData.count {
			myData[i] = myData[i] + 10
		}
		
		print("myData is now")
		print()
		
		// output the updated data
		print(myData)
		
		print()
		print("which is shown in the table, even though we updated the data *after* calling .reloadData()")
		print()

	}

}

// output is:

/*

r:	 0 	 1000 	in cellForRowAt
r:	 1 	 1100 	in cellForRowAt
r:	 2 	 1200 	in cellForRowAt
r:	 3 	 1300 	in cellForRowAt
r:	 4 	 1400 	in cellForRowAt

on entry to myReload(), myData is

[1000, 1100, 1200, 1300, 1400]

now call .reloadData()

now modify data

myData is now

[1010, 1110, 1210, 1310, 1410]

which is shown in the table, even though we updated the data *after* calling .reloadData()

r:	 0 	 1010 	in cellForRowAt
r:	 1 	 1110 	in cellForRowAt
r:	 2 	 1210 	in cellForRowAt
r:	 3 	 1310 	in cellForRowAt
r:	 4 	 1410 	in cellForRowAt

*/