Chunk in C#

Batch a sequence into arrays of at most n.

var items = Enumerable.Range(1, 10);

// Chunk cuts a sequence into arrays of at most n
foreach (var batch in items.Chunk(4))
{
    Console.WriteLine($"batch of {batch.Length}: " +
                      string.Join(",", batch));
}

// the classic use: paging a list for display
var page = items.Chunk(3).ElementAt(1);
Console.WriteLine($"page 2: {string.Join(",", page)}");

How it works

Chunk(4) yields three batches from ten items; the last is short.
Each batch is a real array with a Length.
Chunk(3).ElementAt(1) is page two of a paged list.

Keywords and builtins used here

foreach
in
string
var

The run, in numbers

Lines: 12
Characters to type: 347
Tokens: 68
Three-star pace: 90 tpm

At the three-star pace of 90 tokens a minute, this run takes about 45 seconds.

Type this snippet

Step 2 of 3 in Slicing, step 5 of 17 in LINQ in depth.

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