public function slugs()
 {
     $slugs = Slug::orderBy('updated_at', 'desc')->get();
     /******************/
     $dirtyCities = Flight::doesntHave('city')->orderBy('country_code')->groupBy('city')->get();
     $cleanCities = City::groupBy('city_slug')->get();
     $noMatches = array();
     $dirtyCountries = array();
     $cleanCountries = array();
     foreach ($dirtyCities as $dirtyCity) {
         $similarsArray = array();
         foreach ($cleanCities as $cleanCity) {
             similar_text($dirtyCity->city_slug, $cleanCity->city_slug, $percent);
             $similarityArray[$cleanCity->city_slug] = $percent;
             $cleanCountries[$cleanCity->city_slug] = $cleanCity->country_code;
         }
         //sort in descending order
         arsort($similarityArray);
         //take first few with highest similarity
         $similarityArray = array_slice($similarityArray, 0, 8);
         $noMatches[$dirtyCity->city_slug] = $similarityArray;
         $dirtyCountries[$dirtyCity->city_slug] = $dirtyCity->country_code;
     }
     return view('scrapers.slugs')->with(['slugs' => $slugs, 'noMatches' => $noMatches, 'dirtyCountries' => $dirtyCountries, 'cleanCountries' => $cleanCountries]);
 }