antd react form.list动态增减表单项Switch受控

list

List<int> ints = new List<int>();
ints.Add(3);

ints.Add(6);
Console.WriteLine(ints.Count);
ints.Insert(1, 55);

Console.WriteLine(ints.IndexOf(6)); ;
Console.WriteLine(ints.Contains(3));
ints.Remove(3);
ints.RemoveAt(0);
foreach (int tmp in ints)
{
    Console.WriteLine(tmp);
}

HashSet

 HashSet<Guid> sets = new HashSet<Guid>();

 for (int i = 0; i < 10000000; i++)
 {
     Guid guid = Guid.NewGuid();
     sets.Add(guid);
 }

 Console.WriteLine(sets.Count());

Dictionary

Dictionary<string, string> dic = new Dictionary<string, string>();
dic.Add("ddd", "ooo");
dic.Add("uuu", "zzzz");
Console.WriteLine(dic.ContainsKey("ddd"));
Console.WriteLine(dic.ContainsValue("ooo"));
foreach (string key in dic.Keys)
{
    Console.WriteLine($"{key}:{dic[key]}");
}
dic.Remove("ddd");
foreach (KeyValuePair<string, string> kv in dic)
{
    Console.WriteLine($"{kv.Key} {kv.Value}");
}

统计单词出现次数

string sentence = "this is a book that is a desk";
string[] arr = sentence.Split(' ');
Dictionary<string, int> dic = new Dictionary<string, int>();
foreach (string word in arr)
{
    if (dic.ContainsKey(word))
    {
        int count = dic[word];
        count++;
        dic[word] = count;
    }
    else
    {
        dic.Add(word, 1);
    }
}
foreach (KeyValuePair<string, int> kv in dic)
{
    Console.WriteLine($"{kv.Key}-----{kv.Value}");
}