Tuple<int,string,string> person = new Tuple <int,string,string>(1,"Steve","Jobs"); var numbers = Tuple.Create(1,2,3,4,5,6,7,8); 一个元组最多只能包含八个元素。当您尝试包含八个以上的元素时,它将产生编译器错误。 (int,string,string) person = (1,"Steve","Jobs") stringname1 = ...
autostudent2 = std::tie(names[2], ranks[2], score[2]); auto[a, b, c] = student2;// C++17 structured binding std::cout <<"student2> name: "<< a <<", rank: "<< b <<", score: "<< c << std::endl; return0; } // filename: ch1-tuple-example-1.cpp // compile th...
var valueTuple = ValueTuple.Create(1,"Joydip","Kanjilal");var tuple = valueTuple.ToTuple(); 1. 2. ValueTuple 拥有比 Tuple 更简单的词法和更高的性能,此外,还可以修改它们的数据成员并且还可以给它们赋一些有意义的名字,总之,有太多的理由值得你用 ValueTuple 来代替 Tuple 了。 译文链接:https://w...
tuple_data = (('a', 1), ('b', 2, 'extra'), ('c', 3)) # 检查每个子元组的长度是否为2 if all(len(item) == 2 for item in tuple_data): dict_data = dict(tuple_data) else: print("元组元素数量不一致,无法转换为字典") # 输出: 元组元素数量不一致,无法转换为字典 通过这种方式,...
public static Tuple<T1> Create<T1>(T1 item1) { return new Tuple<T1>(item1); } public static Tuple<T1, T2> Create<T1, T2>(T1 item1, T2 item2) { return new Tuple<T1, T2>(item1, item2); } public static Tuple<T1, T2, T3> Create<T1, T2, T3>(T1 item1, T2 item2, T3 ...
using System; using System.Globalization; public class Example { public static void Demo(System.Windows.Controls.TextBlock outputBlock) { outputBlock.FontFamily = new System.Windows.Media.FontFamily("Courier New"); Tuple<string, int, double, double>[] temperatures = { Tuple....
我们的 std::thread 的第一个参数是可以传带有任意参数列表的可调用对象的，但 pthread_create 只能接受...
// Create a 7-tuple. var population = new Tuple<string, int, int, int, int, int, int>( "New York", 7891957, 7781984, 7894862, 7071639, 7322564, 8008278); // Display the first and last elements. Console.WriteLine("Population of {0} in 2000: {1:N0}", population.Item1, population...
create table users(id int, name text, active bool); insert into users values(1, 'a', true); insert into users values(2, 'b', false); insert into users values(3, 'c', true); CREATE OR REPLACE FUNCTION get_active_users() RETURNS SETOF users AS $$ BEGIN RETURN QUERY SELECT * FR...
var testTuple7 = System.Tuple.Create<int, int, int, int, int, int, int>(1, 2, 3, 4, 5, 6, 7); Console.WriteLine($"Item 1: {testTuple7.Item1}, Item 7: {testTuple7.Item7}"); var testTuple8 = System.Tuple.Create<int, int, int, int, int, int, int, int> ...