Question

从给定的集合

{1,2,3,4,5,6,7,8,99,89}

使用LINQ获取所有可能的两个数字子集的方法是什么？

（即）{1,2}，{1,3}，{1,4} .....

Answer 1

交叉加入？

var data = new[] {1,2,3,4,5,6,7,8,99,89};
var qry = from x in data
          from y in data
          where x < y
          select new {x,y};
foreach (var pair in qry) {
    Console.WriteLine("{0} {1}", pair.x, pair.y);
}

三倍：

var data = new[] { 1, 2, 3, 4, 5, 6, 7, 8, 99, 89 };
var qry = from x in data
          from y in data
          where x < y
          from z in data
          where y < z
          select new { x, y, z };
foreach (var tuple in qry) {
    Console.WriteLine("{0} {1} {2}", tuple.x, tuple.y, tuple.z);
}

Answer 2

此链接不支持LINQ查询，但我认为它相关且相关：Permutations, Combinations, and Variations using C# Generics

获取子列表

2 个答案: