Yup, the last two characters (colon and pipe) are ignored. The result array should have three values.

It may be improved, but I need your text to consider it and make the changes.

Hi @pedrofialho. You suggestions are welcome but I'd like if you could be specific in the part or parts that, from your point of view, should be improved.
Where it says "________________________" should be more suitable " __________________________". Thanks for your feedback and I'll be waiting your answer. To tell you the truth, I didn't see this property anywhere. I was trying to get a new integers sequence and voilá. Perhaps someone did it before me, but I don´t know.

Right!
Include? is too slow for big arrays.

Awesome. Thanks for your help.

Has this been resolved now, or is it still a problem?

seconded

I've tweaked the description to be clearer. Hope it helps?

Aren't you getting a timeout error?
Your solution works, but is too slow. The includes for very large linked lists will make it run really slowly.
Try optimizing.