func searchAutocompleteEntriesWithSubstring(substring: String) {
    suggestions.removeAll()

    let realmSuggestions = realm.objects(Cities).filter("ru BEGINSWITH[c] '\(substring)'")
    for suggestion in realmSuggestions {
        suggestions.append(suggestion.valueForKey("ru") as! String)
    }
    suggestionsTableView.reloadData()
}

func searchAutocompleteEntriesWithSubstring(substring: String) {
    suggestions.removeAll()

    let realmSuggestions = realm.objects(Cities).filter("en BEGINSWITH[c] '\(substring)'")
    for suggestion in realmSuggestions {
        suggestions.append(suggestion.valueForKey("en") as! String)
    }
    suggestionsTableView.reloadData()
}