Split String into smaller Strings by length variable

Question

I\'d like to break apart a String by a certain length variable.
It needs to bounds check so as not explode when the last section of string is not as long as or longer th

Answer 1

Here's what I'd do:

public static IEnumerable EnumerateByLength(this string text, int length) {
    int index = 0;
    while (index < text.Length) {
        int charCount = Math.Min(length, text.Length - index);
        yield return text.Substring(index, charCount);
        index += length;
    }
}

This method would provide deferred execution (which doesn't really matter on an immutable class like string, but it's worth noting).

Then if you wanted a method to populate an array for you, you could have:

public static string[] SplitByLength(this string text, int length) {
    return text.EnumerateByLength(length).ToArray();
}

The reason I would go with the name EnumerateByLength rather then SplitByLength for the "core" method is that string.Split returns a string[], so in my mind there's precedence for methods whose names start with Split to return arrays.

That's just me, though.