This sound like a neat fustom functoid. I'd build it using the pattern described and give it 2 inputs: string to split, and delimiter. The question is what to do with any exceptions. This can be modifed or switched with a 3rd input perhaps. You can return empty string, the original string, or an error message to test for.
Is this something you'd be interested interested in? I could build it over an evening and post the results. If possible, I'd like someone to generate the 16×16 bitmap for the functoid image. No promises on fitness for particular business need, etc, etc. 🙂