Helper function to avoid unnecessary copying if x is already an array.
remarks
First checks if x is an array and if so returns it. Else attempts to obtain an iterator from x and if successful collects it as array and returns it. Throws error if x isn't iterable.
Helper function to avoid unnecessary copying if
xis already an array.First checks if
xis an array and if so returns it. Else attempts to obtain an iterator fromxand if successful collects it as array and returns it. Throws error ifxisn't iterable.