How to make scrollable in table for ui.table liberary

Hi Expert,

I have a dropdownbox, what ever value I'm selecting in the dropdown I'm making that many number of columns in my table(I'm using ui.table ) as visible and remaining columns as scrollable.

eg:  I have 6 columns in my table (ui.table) and I selected dropdown value as 2

dropdown : 2

table:   column1   column2

rows1

row2

row3

row4

Now I want to show remaining columns as scrollable. How to achieve that?

this is the code that I written in my change function of combobox

        var columnCount = parseInt(oControlEvent.getParameter("newValue"));

        var arrColumns = oTable.getColumns();

        for(i=0;i<arrColumns.length;i++)

Thanks,

Ashok.