Creating datasource for our Expandable and collapsable UITableView

Expandable-collapsable-UITableView-using-Swift3-Part1.swift

      var dataArray:[Dictionary<String, AnyObject>] = Array()

        var indDictionary = [String: AnyObject]()
        indDictionary.updateValue("India" as AnyObject, forKey: "parent")
        var inCitiesArray:[String] = Array()
        inCitiesArray.append("New Delhi")
        inCitiesArray.append("Mumbai")
        inCitiesArray.append("Chennai")
        inCitiesArray.append("Kolkata")
        indDictionary.updateValue(inCitiesArray as AnyObject, forKey: "child")
        dataArray.append(indDictionary)
        
        var usaDictionary = [String: AnyObject]()
        usaDictionary.updateValue("USA" as AnyObject, forKey: "parent")
        var usCitiesArray:[String] = Array()
        usCitiesArray.append("New York")
        usCitiesArray.append("Chicago")
        usCitiesArray.append("Dellas")
        usCitiesArray.append("Vegas")
        usaDictionary.updateValue(usCitiesArray as AnyObject, forKey: "child")

        dataArray.append(usaDictionary)
        
        var ukDictionary = [String: AnyObject]()
        ukDictionary.updateValue("United Kindom" as AnyObject, forKey: "parent")
        var ukCitiesArray:[String] = Array()
        ukCitiesArray.append("London")
        ukCitiesArray.append("Lancashire")
        ukCitiesArray.append("Manchestar")
        ukCitiesArray.append("NewCastle")
        ukDictionary.updateValue(ukCitiesArray as AnyObject, forKey: "child")
        dataArray.append(ukDictionary)
        
        var saDictionary = [String: AnyObject]()
        saDictionary.updateValue("Australia" as AnyObject, forKey: "parent")
        var saCitiesArray:[String] = Array()
        saCitiesArray.append("Sydney")
        saCitiesArray.append("Canberra")
        saCitiesArray.append("Melbourne")
        saCitiesArray.append("Perth")
        saDictionary.updateValue(saCitiesArray as AnyObject, forKey: "child")
        dataArray.append(saDictionary)