Getting column index from sName

Is there an easy way to get the index of a column from the sName of that column?

Something like:

var oTable = $('#example').dataTable();
var iColIndex = oTable.fnColIndex("exampleColumn");

alert( "Index of column with sName: exampleColumn is: " + iColIndex );

Right now I'm looping through aoColumns looking for the sName that I need which isn't very efficient to do for every time I need the column index. I know I can just create my own array with that data in it but just wondering if there is something already like that.

Thanks in advance!