一个大数组根据特定大小分割为多个小数组

1. Using Skip() and Take() 的普通方法

using System;
using System.Linq;
using System.Collections.Generic;
 
public static class Extensions
{
    public static IEnumerable<IEnumerable<T>> Split<T>(this T[] arr, int size)
    {
        for (var i = 0; i < arr.Length / size + 1; i++) {
            yield return arr.Skip(i * size).Take(size);
        }
    }
}
 
public class Example
{
    public static void Main()
    {
        int[] arr = { 1, 2, 3, 4, 5 };
        int size = 2;
 
        var arrays = arr.Split(size);
 
        foreach (var array in arrays) {
            Console.WriteLine(String.Join(", ", array));
        }
    }
}

2.  Using Skip() and Take() 的Linq select

using System;
using System.Linq;
using System.Collections.Generic;
 
public static class Extensions
{
    public static IEnumerable<IEnumerable<T>> Split<T>(this T[] arr, int size)
    {
        return arr.Select((s, i) => arr.Skip(i * size).Take(size)).Where(a => a.Any());
    }
}
 
public class Example
{
    public static void Main()
    {
        int[] arr = { 1, 2, 3, 4, 5 };
        int size = 2;
 
        var arrays = arr.Split(size);
 
        foreach (var array in arrays) {
            Console.WriteLine(String.Join(", ", array));
        }
    }
}

3.  Using Enumerable.GroupBy Method

using System;
using System.Linq;
 
public class Example
{
    public static void Main()
    {
        int[] arr = { 1, 2, 3, 4, 5 };
        int size = 2;
 
        int i = 0;
        int[][] arrays = arr.GroupBy(s => i++ / size).Select(s => s.ToArray()).ToArray();
 
        foreach (var array in arrays) {
            Console.WriteLine(String.Join(", ", array));
        }
    }
}