how to find column index using dataIndex Extjs 4

Question

Well in ExtJS 3 i used the following code:

grid.getColumnModel().findColumnIndex(\"Tasks\")

I tried finding it on the api docs, but no luck...so how

Answer 1

 var gridColumns = grid.headerCt.getGridColumns();
 for (var i = 0; i < gridColumns.length; i++) {
   if (gridColumns[i].dataIndex == 'yourdataIndex') {
    alert(i);
   }  
 }