使用Lambda Expression的SubQuery

Question

我正在使用LINQ子查询来获取数组中所有最小长度的单词.我想用Lambda Expression来做.

var names = new[] { "Tom", "Dick", "Harry", "Mary", "Jay" }.AsQueryable();
(
from n in names
where n.Length == names.Min (n2 => n2.Length)
select n
)

输出:汤姆,杰伊

谢谢,Prakhar

Answer 1

这可行:

var minNames = names.Where(s => s.Length == names.Min(n=>n.Length));

但它会评估列表中每个名称的最小长度(O(n*n)复杂性),因此这会更好:

var min = names.Min(s => s.Length); //calc. this only once
var minNames = names.Where(s => s.Length == min);