Splitting an array using LINQ

c# .net arrays linq linq-to-objects
Rosana Huerta picture Rosana Huerta · May 31, 2012 · Viewed 7.2k times · Source

I have a collection uni-dimensional like this:

[1,2,4,5.....n]

I would like to convert that collection in a bi-dimensional collection like this:

[[1,2,3],
[4,5,6],
...]

Basically I want to group or split if you want, the array in groups of 'n' members

I can do it with a foreach statement, but I am currently learning LINQ so instead of iterating through all elements and create a new array manually I would like to use the LINQ features (if applicable)

Is there any LINQ function to help me to accomplish this??

I was thinking in the GroupBy or SelectMany I do not know if they will help me though but they might

Any help will be truly appreciate it =) :**

Answer

Sergey Kalinichenko picture Sergey Kalinichenko · May 31, 2012

You can group by the index divided by the batch size, like this:

var batchSize = 3;
var batched = orig
    .Select((Value, Index) => new {Value, Index})
    .GroupBy(p => p.Index/batchSize)
    .Select(g => g.Select(p => p.Value).ToList());

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