أساسيات Value Tuples

ما هو Tuple؟

using System;

class Program
{
    static void Main()
    {
        (int, string) pair = (1, "one");
        Console.WriteLine(pair.Item1 + " = " + pair.Item2);
    }
}

إنشاء Value Tuple

using System;

class Program
{
    static void Main()
    {
        var point = (3, 4);
        Console.WriteLine("x=" + point.Item1 + ", y=" + point.Item2);
    }
}

الوصول إلى العناصر: Item1 وItem2

using System;

class Program
{
    static void Main()
    {
        var rgb = (255, 128, 0);
        Console.WriteLine("R=" + rgb.Item1 + " G=" + rgb.Item2 + " B=" + rgb.Item3);
    }
}

تحتوي Tuples على أنواع مختلطة

using System;

class Program
{
    static void Main()
    {
        var user = ("Ada", 36, true);
        Console.WriteLine(user.Item1 + ", age " + user.Item2 + ", active=" + user.Item3);
    }
}

Tuples قابلة للتغيير

using System;

class Program
{
    static void Main()
    {
        var score = (player: "A", points: 0);
        score.points = 10;
        score.points += 5;
        Console.WriteLine(score.player + ": " + score.points);
    }
}

Tuples كحزم محلية

using System;

class Program
{
    static void Main()
    {
        var range = (min: 5, max: 50);
        int span = range.max - range.min;
        Console.WriteLine("Span: " + span);
    }
}

مقارنة Tuples

using System;

class Program
{
    static void Main()
    {
        var a = (1, 2);
        var b = (1, 2);
        var c = (1, 3);
        Console.WriteLine(a == b);
        Console.WriteLine(a == c);
    }
}

تداخل Tuples

using System;

class Program
{
    static void Main()
    {
        var line = (start: (0, 0), end: (3, 4));
        Console.WriteLine("From " + line.start.Item1 + "," + line.start.Item2 +
            " to " + line.end.Item1 + "," + line.end.Item2);
    }
}

Tuples داخل المجموعات

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        var scores = new List<(string, int)>
        {
            ("Ann", 90),
            ("Bob", 85)
        };
        foreach (var s in scores)
            Console.WriteLine(s.Item1 + ": " + s.Item2);
    }
}

دلالات القيمة

using System;

class Program
{
    static void Main()
    {
        var original = (n: 1);
        var copy = original;
        copy.n = 99;
        Console.WriteLine("original=" + original.n + ", copy=" + copy.n);
    }
}

تجميع المفاهيم

using System;

class Program
{
    static void Main()
    {
        var result = (count: 3, total: 150);
        double average = (double)result.total / result.count;
        Console.WriteLine("Average: " + average.ToString("0.0"));
    }
}

اختبار سريع

مراجعة

using System;

class Program
{
    static void Main()
    {
        var t = (1, "one", true);
        Console.WriteLine(t.Item1 + " " + t.Item2 + " " + t.Item3);
    }
}