如何在C＃邮编两个以上的泛型列表结合？ [英] How to combine more than two generic lists in C# Zip?

问题描述

我有三个（它可能有超过3-4通用的列表，但在这个例子中，让3）泛型列表。

I have three (it's possible to have more than 3-4 generic list, but in this example let 3) generic lists.

List<string> list1

List<string> list2

List<string> list3

所有列表有相同数目的元素（相同的计数）。

all lists have same number of elements (same counts).

我用了两个清单合并ZIP：

I used that for combining two lists with ZIP :

var result = list1.Zip(list2, (a, b) => new {
  test1 = f,
  test2 = b
}

我用了的foreach 语句，避免的foreach 每个列表，像

I used that for foreach statement, to avoid foreach each List, like

foreach(var item in result){
Console.WriteLine(item.test1 + " " + item.test2);
}

如何使用simmilary与邮政编码为三个列表？

How to use simmilary with Zip for three lists ?

感谢

的 修改的

我要像：

List<string> list1 = new List<string>{"test", "otherTest"};

List<string> list2 = new List<string>{"item", "otherItem"};

List<string> list3 = new List<string>{"value", "otherValue"};

ZIP后（我不知道的方法），我想结果（VS2010调试模式）

after ZIP (I don't know method), I want to result (in VS2010 debug mode)

[0] { a = {"test"},
      b = {"item"},
      c = {"value"}
    }   

[1] { a = {"otherTest"},
      b = {"otherItem"},
      c = {"otherValue"}
    }  

该怎么做？

推荐答案

对我来说，最明显的方法是使用邮编两次。

The most obvious way for me would be to use Zip twice.

例如，

var results = l1.Zip(l2, (x, y) => x + y).Zip(l3, (x, y) => x + y);

将结合（添加）三种名单，LT元素; INT方式＆gt; 对象

更新：

您可以定义一个行为像邮编三的IEnumerable S，像这样一个新的扩展方法：

You could define a new extension method that acts like a Zip with three IEnumerables, like so:

public static class MyFunkyExtensions
{
    public static IEnumerable<TResult> ZipThree<T1, T2, T3, TResult>(
        this IEnumerable<T1> source,
        IEnumerable<T2> second,
        IEnumerable<T3> third,
        Func<T1, T2, T3, TResult> func)
    {
        using (var e1 = source.GetEnumerator())
        using (var e2 = second.GetEnumerator())
        using (var e3 = third.GetEnumerator())
        {
            while (e1.MoveNext() && e2.MoveNext() && e3.MoveNext())
                yield return func(e1.Current, e2.Current, e3.Current);
        }
    }
}

的使用（在与上述相同的上下文中）现在变为：

The usage (in the same context as above) now becomes:

var results = l1.ZipThree(l2, l3, (x, y, z) => x + y + z);

同样的，你三个列表现在可以结合：

Similarly, you three lists can now be combined with:

var results = list1.ZipThree(list2, list3, (a, b, c) => new { a, b, c });

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