Splitting a string into chunks of a certain size

Question

Suppose I had a string:

string str = \"1111222233334444\"; 

How can I break this string into chunks of some size?

e.g., breaking t

Answer 1

This is based on @dove solution but implemented as an extension method.

Benefits:

• Extension method
• Covers corner cases
• Splits string with any chars: numbers, letters, other symbols

Code

public static class EnumerableEx
{    
    public static IEnumerable SplitBy(this string str, int chunkLength)
    {
        if (String.IsNullOrEmpty(str)) throw new ArgumentException();
        if (chunkLength < 1) throw new ArgumentException();

        for (int i = 0; i < str.Length; i += chunkLength)
        {
            if (chunkLength + i > str.Length)
                chunkLength = str.Length - i;

            yield return str.Substring(i, chunkLength);
        }
    }
}

Usage

var result = "bobjoecat".SplitBy(3); // bob, joe, cat

Unit tests removed for brevity (see previous revision)