Hey, thanks for the feedback =)

it will now show the expected value

and i hope i've corrected all spelling mistakes

But leading zeros are no problem, e.g. "192.168.1.001" will work, your webbrowser will convert it to "192.168.1.1" so you reach your router.
And even C# has no problem if you try to connect to a server at "127.0.0.1" with "127.0.0.001".

Why do i get an multi-dimensional keys-array in the second test?

keys = [["Peter",37],["Lois",31],["Meg",18],["Chris",15],["Stewie",1]]
values = undefined

and the description says: "If only keys are given, then set the values to undefined."
but the test expected: {"Peter":37,"Lois":31,"Meg":18,"Chris":15,"Stewie":1}