Chopping string with LINQ

Question

I would like to use LINQ to achieve this:

Having a string like "abcdefghijk" and a "chunk size" of 3,

The LINQ query should return
```
{"abc", "def", "ghi", "jk" }
```
With chunk size of 4:
```
{"abcd", "efgh", "ijk" }
```

I'm almost sure that I would have to use TakeWhile, or Zip, but I don't know how to use them!

Take, TakeWhile, and Skip work in singular fashion, not repetitively, I believe. — Brian Mains, Sep 03 '14 at 19:27
possible duplicate of [Create batches in linq](http://stackoverflow.com/questions/13731796/create-batches-in-linq) — jamesSampica, Sep 03 '14 at 19:33

score 4 · Accepted Answer · answered Sep 03 '14 at 19:24

4

You can use Batch method from MoreLinq library:

var chunks = str.Batch(4).Select(x => new string(x.ToArray()).ToList();

This can also be done with GroupBy but the code won't look that pretty:

var chunks = str
          .Select((x,idx) => new { x, idx })
          .GroupBy(c => c.idx / 4)
          .Select(g => new string(g.Select(c => c.x).ToArray()))
          .ToList();

answered Sep 03 '14 at 19:24

Selman Genç

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Note that this version of batching fully buffers so if you are looking at huge string sizes it's going to be slow. – jamesSampica Sep 03 '14 at 19:30

Chopping string with LINQ

1 Answers1