List ling統計関数Distinct Sum Max Average

2181 ワード

var langCount = (from s in GetStudents() select s.Language) .Distinct() .Count(); Response.Write(string.Format("

{0}

", langCount)); #endregion
#region用Count()のLambda式で条件を満たす要素個数Response.Write("

Count()でクエリ結果が得られた個数
"); var ageCoun = (from s in GetStudents() select s.Age) .Count(a=>a>22); Response.Write(string.Format("

{0}

", ageCoun)); #endregion
#regionはSum()でクエリ結果をResponseに加算.Write("

はSum()でクエリ結果を加算
"); var ageSum = (from s in GetStudents() select s.Age) .Sum(); //var ageSum = GetStudents().Sum(s=>s.Age); Response.Write(string.Format("

{0}

", ageSum)); #endregion
#regionはMin()でクエリ結果の最小値Responseを求める.Write("

はMin()でクエリ結果の最小値
"); var ageMin = (from s in GetStudents() select s.Age) .Min(); //var ageMin = GetStudents().Min(s => s.Age); Response.Write(string.Format("

{0}

", ageMin)); #endregion
#regionはMax()でクエリ結果の最大値Responseを出す.Write("

はMax()でクエリ結果の最大値
"); var ageMax = (from s in GetStudents() select s.Age) .Max(); //var ageMax = GetStudents().Max(s => s.Age); Response.Write(string.Format("

{0}

", ageMax)); #endregion
#regionはAverage()でクエリ結果の平均値Responseを求める.Write(「

Average()でクエリ結果の平均値
」); var ageAverage = (from s in GetStudents() select s.Age) .Average();

var list = from it in lst
                        group it by it.   into g
                       select new
                       {
                              = g.Key,
                              = g.Sum(p=>p.  ),
                       };

leetcode Linked List Cycle II

Javaメモリモデルhappens-before法則