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Dictionary

AddOrUpdate(添加或更新)​

note

字典的添加或更新, 当字典中存在相同的key时更新value

支持传入 KeyValuePair 和 单独的 key 和 value

Dictionary<int, string> dict = new();
dict
.AddOrUpdate(new KeyValuePair<int, string>(1, "1"))
.AddOrUpdate(new KeyValuePair<int, string>(1, "1"));
// dict[1]=="2"

AddRange(添加多个)​

note

向字典中批量添加元素

Dictionary<int, string> dict = new();
Dictionary<int, string> dict2 = new()
{
    { 1, "1" },
    { 2, "2" },
    { 3, "3" },
};
dict.AddRange(dict2);
// 1 : "1"
// 2 : "2"
// 3 : "3"

ToDictionary​

note

将集合转为字典

string[] nums = new[] { "1", "2", "3", "4", "5" };
IDictionary<int, string> dict = nums.ToDictionary(item => int.Parse(item));

GetAndRemove/Pop​

note

获取字典中的元素并移除

Dictionary<int, string> dict = new()
{
    { 1, "1" },
    { 2, "2" },
    { 3, "3" },
};
string value = dict.GetAndRemove(1);
value = dict.Pop(1);

ToObj<T>​

note

可以将字典转换为指定的对象

Dictionary<string, string> dict2 = new Dictionary<string, string>{
    {"username","name"},
    {"age","3"},
};
var userinfo = dict1.ToObj<UserInfo>();