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

From Apple Documentation :

var keys: LazyForwardCollection, Key>> { get }

Description: A collection containing just the keys of self. Keys appear in the same order as they occur as the .0 member of key-value pairs in self. Each key in the result has a unique value.

names.keys.array returns an Array of the keys.

SO:

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

func sectionIndexTitlesForTableView(tableView: UITableView) -> [AnyObject]!{
return names.keys.array
}

func tableView(tableView: UITableView,
    titleForHeaderInSection section: Int) -> String?{        
return names.keys.array[section]
}

This will work on Any Dictionary with any amount of data(even if it is unknown to the programmer