聚合操作

标签：element   item   enum   comm   rate   com   count   ring   class   

聚合操作

Aggregate

Performs a custom aggregation operation on the values in the collection.

1. IList<String> strList =newList<String>(){"One","Two","Three","Four","Five"};
3. var commaSeperatedString = strList.Aggregate((s1, s2)=> s1 +", "+ s2);
5. Console.WriteLine(commaSeperatedString);
7. //Results
8. One,Two,Three,Four,Five

Average

calculates the average of the numeric items in the collection.

Count

Counts the elements in a collection.

LongCount

Counts the elements in a collection.

Max

Finds the largest value in the collection.

Min

Finds the smallest value in the collection.

Sum

Calculates sum of the values in the collection.

聚合操作

标签：element   item   enum   comm   rate   com   count   ring   class   

原文地址：http://www.cnblogs.com/wuyicqb/p/6371957.html