比较两个数组并从第二个数组中删除相同（相交）的值[重复]

Question

       string[] one={"my", "5", "two", "array", "hey?", "good", "day"};
       string[] two={"hello!", "how", "good", "day", "us", "very", "two", "hard", "learn", "it"};

例如：我有这些上面的数组，我想比较它们，比较后从 string[] 两个中删除相同的值。所以，当我编译代码时，我的数组会是这样的；

       string[] one={"my", "5", "two", "array", "hey?", "good", "day"};
       string[] two={"hello!", "how", "us", "very", "hard", "learn", "it"};

注意：我无法对此产生任何想法，抱歉。

Answer 1

只需在Linq 语句中使用Where、Contains，然后使用ToArray

简单来说，

1. 它通过检查数组one 是否不包含两个元素中的每个元素来过滤数组two

2. 将输出转换回数组

3. 将其分配给您的变量two

示例

string[] one={"my", "5", "two", "array", "hey?", "good", "day"};
string[] two = { "hello!", "how", "good", "day", "us", "very", "two", "hard", "learn", "it" };

two = two.Where(x => !one.Contains(x)).ToArray();

Console.WriteLine(string.Join(",", two));

注意，这是区分大小写的

输出

hello!,how,us,very,hard,learn,it

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或者更高效的方法是使用Except，我完全忘记了（感谢 cmets）

two = two.Except(one).ToArray();

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Enumerable.Except Method

产生两个序列的集合差。

Enumerable.Where Method

根据谓词过滤一系列值。

Enumerable.Contains Method

确定序列是否包含指定元素。

Enumerable.ToArray(IEnumerable) Method

从 IEnumerable 创建一个数组。