MoreLinq

MoreLinq是在Linq的基础上增加了很多的扩充。

Git：

　　https://github.com/morelinq/MoreLINQ

Nuget: 

　　pm=>   Install-Package morelinq -Version 3.3.2

具体使用：

• ForEach

var list1 = Enumerable.Range(1, 10);
list1.ForEach(a => Console.WriteLine(a));

　　输出：

• Insert(插入-从前往后)/Backsert（后置，从后往前）

   　　　　　 var list1 = Enumerable.Range(1, 10);
            var newInt = list1.Backsert(new List<int> { 99 }, 10);//从后往前数10个
            Console.WriteLine("this‘s Backsert:");
            newInt.ForEach(a => Console.Write(a));
            var insert= list1.Insert(new List<int> { -1 }, 0);//插入第0个
            Console.WriteLine("\r\n this‘s Insert");
            insert.ForEach(a => Console.Write(a));

结果：

• Cartesian(笛卡尔积)/Zip(拉链)

var list1 = Enumerable.Range(1, 10);
            var list2 = Enumerable.Range(10, 10);
            var CartesianResult = list1.Cartesian(list2, (a, b) => new int[] { a, b });
            Console.WriteLine("Cartesian-Result:");
            CartesianResult.ForEach(a => Console.Write(string.Join("-", a)+" "));
            var ZipResult = list1.Zip(list2, (a, b) => new int[] { a, b });
            Console.WriteLine("\r\nZip-Result:");
            ZipResult.ForEach(a => Console.Write(string.Join("-",a) + " "));

结果：

• Batch(批量)/Partition（分区）

var list1 = Enumerable.Range(1, 10);
            var result1 = list1.Batch(3);
            Console.WriteLine("Batch:");
            result1.ForEach((a,i) =>
            {
                Console.WriteLine($"this {++i} Batch: ");
                a.ForEach(v => Console.WriteLine(v)); 
            });
            var result2 = list1.Partition(a=>a%2==1);
            Console.WriteLine("分割线---------------------------------------");
            Console.WriteLine("Partition-false:"); 
            result2.False.ForEach(a => Console.Write(a + " "));
            Console.WriteLine("\r\nPartition-true:");
            result2.True.ForEach(a => Console.Write(a + " "));

结果：

• Shuffle（随机排序/乱序）

var list1 = Enumerable.Range(1, 10);
            list1.Shuffle().ForEach(a => Console.WriteLine(a));

结果：

• OfType<T>(按类型获取集合)

ArrayList list = new ArrayList() { 
                1,
                "a",
                new { name="张三"},
                3.02,
                'A',
                false,
                true,
                999999999999999999L
            };
            {// # C#9.0语法糖
                //foreach (var item in list)
                //{
                //    if (item is { } ai and not string and not char and not 0) //
                //    {
                //        Console.WriteLine( item);
                //    }
                //}
            }
            Console.WriteLine("type of long:");
            Console.WriteLine(" -"+ list.OfType<long>().FirstOrDefault());
            Console.WriteLine("type of bool:");
            Console.WriteLine(" -" + list.OfType<bool>().FirstOrDefault());
            Console.WriteLine("type of int:");
            Console.WriteLine(" -" + list.OfType<int>().FirstOrDefault());

结果：

• ToDataTable（集合转表）

 class Program
    {
        class Person
        {
            public Person(string name, int age)
            {
                Name = name;
                Age = age;
            }

            public string Name { get; set; }
            public int Age { get; set; } 
        }
        static void Main(string[] args)
        {
            List<Person> people = new List<Person>();
            people.Add(new Person("张三", 15));
            people.Add(new Person("李四", 16));
            people.Add(new Person("王五", 17));
            people.Add(new Person("赵六", 18));
            var data= people.ToDataTable();


        }
    }

结果：

• ToDictionary(转换为字典)

            List<string> list = new ()
            {
                "张三","男","18","false",
                "李四","女","10","false",
                "王五","女","29","true",
                "赵六","女","57","true"
            };
           var dic= list.Batch(4).ToDictionary(
                a => a.ElementAt(0).Trim(),
                a => int.Parse(a.ElementAt(2)) 
                );
            dic.ForEach(i => Console.WriteLine($"key:{i.Key}    value:{i.Value}"));            

结果：

  

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