Job,
A datatable is a collection of items in a collection (array) of rows
Therefore
datatable.rows(0).item(0) is the first collection item in the first row.
Bringing this to an array is almost forever useless because it is already an
collection.
There is not a one by one inbuild convert function for this, however when
you really want it you can do it using a simple for index loop or a for each
loop depending on the type of array you want to make.
I hope this helps,
Cor