上代码，主要是学习到了如何对比出两个List集合的和差交并集方法
static void Main(string[] args)
{
var leftKes = new List<string>() { "111111", "222222", "333333", "444444" };
var rightKes = new List<string>() { "333333", "444444", "555555", "666666" };
Console.WriteLine("Left集合");
Console.WriteLine(string.Join(',', leftKes));
Console.WriteLine("-------------------------------------");
Console.WriteLine("Right集合");
Console.WriteLine(string.Join(',', rightKes));
Console.WriteLine("-------------------------------------");
Console.WriteLine("Left多的 ");
Console.WriteLine(string.Join(',', leftKes.Except(rightKes)));
Console.WriteLine("-------------------------------------");
Console.WriteLine("Right多的 ");
Console.WriteLine(string.Join(',', rightKes.Except(leftKes).ToList()));
Console.WriteLine("-------------------------------------");
Console.WriteLine("Left和Right交集 ");
Console.WriteLine(string.Join(',', rightKes.Intersect(leftKes)));
Console.WriteLine("-------------------------------------");
Console.WriteLine("Left和Right并集 ");
Console.WriteLine(string.Join(',', leftKes.Union(rightKes)));
Console.WriteLine("-------------------------------------");
Console.WriteLine("Left和Right对称差集 ");
Console.WriteLine(string.Join(',', leftKes.Union(rightKes).Except(rightKes.Intersect(leftKes))));
Console.WriteLine("-------------------------------------");
}
static void Test()
{
Console.WriteLine("-------------------开始初始化集合-------------------");
#region 制造数据
var watch = new Stopwatch();
watch.Start();
var listA = new List<string>();
var listB = new List<string>();
for (int i = 0; i < 1000000; i++)
{
var id = Guid.NewGuid().ToString();
listA.Add(id);
}
listB.AddRange(listA);
//制造B的差异数据
for (int i = 0; i < 10; i++)
{
var tick = DateTime.Now.Ticks;
var random = new Random((int)(tick & 0xffffffffL) | (int)(tick >> 32));
var index = random.Next(1, 100000);
listB[index] = Guid.NewGuid().ToString();
}
watch.Stop();
TimeSpan span = watch.Elapsed;
Console.WriteLine("制造数据总共花费{0}ms.", span.TotalMilliseconds);
#endregion
#region 比较
Console.WriteLine("-------------------开始比较-------------------");
Console.WriteLine("-------------------listA中交集外---------------------");
watch = new Stopwatch();
watch.Start();
var listD = listA.Except(listA.Intersect(listB));
watch.Stop();
span = watch.Elapsed;
Console.WriteLine("listA中交集外 总共花费{0}ms.", span.TotalMilliseconds);
foreach (var item in listD)
{
Console.WriteLine(item);
}
Console.WriteLine("----------------------listB中交集外--------------------");
watch = new Stopwatch();
watch.Start();
var listE = listB.Except(listA.Intersect(listB));
watch.Stop();
span = watch.Elapsed;
Console.WriteLine("listB中交集外 总共花费{0}ms.", span.TotalMilliseconds);
foreach (var item in listE)
{
Console.WriteLine(item);
}
Console.WriteLine("--------------listA和listB中交集外-------------------");
watch = new Stopwatch();
watch.Start();
var listF = listA.Concat(listB).Except(listA.Intersect(listB));
watch.Stop();
span = watch.Elapsed;
Console.WriteLine("listA和listB中交集外 总共花费{0}ms.", span.TotalMilliseconds);
foreach (var item in listF)
{
Console.WriteLine(item);
}
#endregion
}
对比的运行时长结果：
来自：https://www.cnblogs.com/axzxs2001/p/11637113.html
标签：Console,watch,var,WriteLine,集合,两个,listA,对比,listB From： https://www.cnblogs.com/djd66/p/17121936.html