Split an array into chunks of specific size in C#

This post will discuss how to split an array into chunks of a specific size in C#.

1. Using `Skip()` and `Take()`

The Take() method returns a specified number of elements from the beginning of a sequence, and the Skip() method skips the specified number of elements in a sequence. They can be used as follows to split an array into chunks of smaller arrays of a specific size.

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));

}

Download Run Code

Output:

1, 2
3, 4
5

Another option is to use LINQ’s Select() method to split an array into equal length subarrays. The following code example shows how to use this with Skip() and Take() method:

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));

}

Download Run Code

Output:

1, 2
3, 4
5

2. Using `Enumerable.GroupBy` Method

Alternatively, you can use the LINQ’s Enumerable.GroupBy method to group all items by the chunk size and convert each sequence to a new array. Here’s an example of its usage:

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));

}

Download Run Code

Output:

1, 2
3, 4
5

That’s all about splitting an array into chunks of a specific size in C#.

Split an array into chunks of specific size in C#

1. Using Skip() and Take()

2. Using Enumerable.GroupBy Method

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1. Using `Skip()` and `Take()`

2. Using `Enumerable.GroupBy` Method