Insert in combined array creates empty rows??

Question

see my code 7zottenARR. My attempt to insert on position 14 of the combined array results in a few empty rows at the end of the array followed by the last 2 fields. Why does this happen? tnx
https://code.sololearn.com/cm80kWDg4gcp/?ref=app

Answer 1

I've changed the "puts" in the end to "print" so this is how your array really looks like:
[[7, "zotten", "zwommen", 7, "zonnige", "zondagen", "zonder", "zwarte"], ["zwembroek", "ze", "zijn", "ZOT", "zei", "Zulma"], "ze", "zullen", "ziek", "zijn"]
You have:
pos 0 nested array
pos 1 nested array
pos 2-5 strings

Is that what you aimed for?

Answer 2

print would have immediately visualized what I overlooked: the nested arrays and pos counting... thanks a lot!