Array.pad(NewLength, PadString)
Pad the array to be of length NewLength, and fill the extra elements added with PadString (default 0) if given.
[1,2,3].pad(10,3) [1, 2, 3, 3, 3, 3, 3, 3, 3, 3]
["TEST","CAR"].pad(10,"TEST")
["TEST", "CAR", "TEST", "TEST", "TEST", "TEST", "TEST", "TEST", "TEST", "TEST"]