c#代码备忘

1、统计词频。重点在于统计后的排序

                    Dictionary<string, WordStatistic> dws = new Dictionary<string, WordStatistic>();

                    WordStatistic ws = null;

                    foreach (string s in words)

                    {

                        if (dws.ContainsKey(s))

                        {

                            dws.TryGetValue(s, out ws);

                            ws.WordCount++;

                        }

                        else

                        {

                            ws = new WordStatistic();

                            ws.WordCount++;

                            ws.Word = s;

                            dws.Add(s, ws);

                        }

                    }



                    Dictionary<string, WordStatistic>.ValueCollection vc = dws.Values;

                    List<WordStatistic> lws = vc.ToList();



                    IEnumerable<WordStatistic> siws = lws.OrderByDescending(sws => sws.WordCount);

                    List<WordStatistic> slws = siws.ToList();