Adding transpose lookup method. This will matrix transpose arrays that a...

Transpose a list of arrays:
    [1, 2, 3], [4, 5, 6] -> [1, 4], [2, 5], [3, 6]
    Replace any empty spots in 2nd array with "":
    [1, 2], [3] -> [1, 3], [2, ""]

And then feed the result like with_items would