How can I group TableView items from a dictionary in swift?

Question

Lets consider this example:

import UIKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource { 
    @IBOutlet weak var tableV         


        

Answer 1

All collection types must be Array

var names = [["Tomato", "Potato", "Lettuce"], ["Apple", "Banana"]]
var sectionNames = ["Vegetables", "Fruits"]

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

func numberOfSectionsInTableView(tableView: UITableView) -> Int{
  return names.count
}

func sectionIndexTitlesForTableView(tableView: UITableView) -> [AnyObject]!{

  return sectionNames
}

func tableView(tableView: UITableView,
  titleForHeaderInSection section: Int) -> String?{
    return sectionNames[section]
}