table of data - update column order when changed in well

[jonespossibly]

Hi - i'm trying to build a custom visual using a table.

I've got the table building and displaying fine, however,  I need to handle when a user changes the order of the data items in the data role.

there is the property on the dataview>table>columns called 'rolesIndex' which gives the position of the column insiode the field well as determined by the user - this wil be different from the table>colum>index if the user has dropped fields int eh field well and then rearranged the order of them.

My question is - does anyone have an easy way of sorting the arrays withing the array of table>rows, such that it matches the order determined by the field in table>columns>rolesIndex?