LinQ 交集
LinQ 交集
Enumerable
1.Enumerable.Except
void Main()
{
List<string> oldList = new List<string>(new string[] { "1", "2", "3" });
List<string> newList = new List<string>(new string[] { "2", "4", "6" });
//從newList中，取出不在oldList中
var diffList1 = newList.Except(oldList);
foreach(var item in diffList1){
Console.WriteLine(item); //4,6
}
從oldList中，取出不在newLsit中
var diffList2 = oldList.Except(newList);
foreach(var item in diffList2){
Console.WriteLine(item); // 1,3
}
}
2.Enumerable.Intersect
List A : { 1 , 2 , 3 , 5 , 9 }
List B : { 4 , 3 , 9 }
var intersectedList = list1.Intersect(list2);
//result : 3,9
