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Dictionary

AddOrUpdate(添加或更新)​

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

支持传入 KeyValuePair 和 单独的 key+value

AddRange(添加多个)​

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"
tip

支持传入 KeyValuePair 集合

ToDictionary(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));
tip

需要使用委托指定字典的 Key 值

GetAndRemove/Pop(获取并移除)​

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

实际上使用 Pop 也可以

dict.Pop(1)

Deconstruct(解构)​

Dictionary<int, string> dict = new()
{
    { 1, "1" },
    { 2, "2" },
    { 3, "3" },
};
foreach (var (value, index) in dict.Deconstruct())
    ;