集合的并集是合并集合的项,如下图所示:
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1 2 3 4 5 6 7 | List<int> ls1 = new List<int>() { 1,2,3,5,7,9 };
List<int> ls2 = new List<int>() { 2,4,6,8,9,10};
IEnumerable<int> unionLs = ls1.Union(ls2); foreach (int item in unionLs)
{
Console.Write( "{0}\t" , item);
}
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集合的交集是取集合的共同的项,如下图所示:
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1 2 3 4 5 6 7 8 | List<int> ls1 = new List<int>() { 1,2,3,5,7,9 };
List<int> ls2 = new List<int>() { 2,4,6,8,9,10};
IEnumerable<int> intersectLs = ls1.Intersect(ls2); foreach (int item in intersectLs)
{
Console.Write( "{0}\t" ,item);
}
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集合的差集是取在该集合中而不在另一集合中的所有的项,如下图所示:
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1 2 3 4 5 6 7 8 | List<int> ls1 = new List<int>() { 1,2,3,5,7,9 };
List<int> ls2 = new List<int>() { 2,4,6,8,9,10};
IEnumerable<int> exceptLs = ls1.Except(ls2); foreach (int item in exceptLs)
{
Console.Write( "{0}\t" , item);
}
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