Пример #1
0
        public static ConcurrentBag <ICityResult> SearchConcurrent(List <string> cities, int nextCharacterPosition)
        {
            var result = new ConcurrentBag <ICityResult>();

            ICityResult cityResult = new CityResult();

            Parallel.ForEach(cities, x =>
            {
                cityResult.NextCities.Add(x);
                cityResult.NextLetters.Add(x[nextCharacterPosition].ToString());
            });
            result.Add(cityResult);
            return(result);
        }
Пример #2
0
        public ICityResult Search(string searchTerm)
        {
            /* Lowing string to keep it consistent, will do the same for data set */
            string lowerSearchTerm = searchTerm.ToLower();

            /* Store length in int. As arrays are 0 index based, a 4 character search term will
             * will give 5th character in the array which will be the next character needed for the NextLetters collection.
             */
            int nextCharacterPosition = searchTerm.Length;

            List <string> cities = _cityRepository
                                   .GetCities().Where(x => x.ToLower().StartsWith(lowerSearchTerm)).ToList();

            ICityResult cityResult = new CityResult();

            /*
             *  Parallel Foreach, unlike a standard Foreach,
             *  do multiple operations together to help speed up to process, utilising multithreading.
             *  This will help with large datasets.
             *
             *  Leaving this in commented as it's something I've tried but the returned is inconsistent/wrong.
             *
             *  ConcurrentBag<ICityResult> searchResults = SearchConcurrent(cities, nextCharacterPosition);
             */

            cities.ForEach(city =>
            {
                cityResult.NextCities.Add(city);

                if (city.Length > nextCharacterPosition)
                {
                    cityResult.NextLetters.Add(city[nextCharacterPosition].ToString());
                }
            });

            return(cityResult);
        }