getting the right colIdx in ExtJs - extjs

Question

ExtJs is a new world for me. I hope I can get the problem explained very well.
I have a grid with different editor columns. If I change one and save it, I have to change the output.
I do it with
e.row.cells[e.colIdx].childNodes[0].innerText = '{s name=column/express/yes}JA{/s}';
e.row.cells[e.colIdx].classList.add("warning");
If I change 2 different fields at the same time, e.colIdx does not fit anymore to the right column.
Is there a getter or anything else to get the column of a special grid column ?
Here is the complete code
onSavePosition: function(editor, e, store, options) {
var me = this,positionStore;
if (((e.newValues.md_express != e.originalValues.md_express) && e.record.internalId > 0)
|| e.newValues.md_supplier != e.originalValues.md_supplier) {
var customCallback = function (position, success) {
Ext.Ajax.request({
method: 'POST',
url: '{url controller=AttributeData action=saveData}',
params: {
_foreignKey: e.record.internalId,
_table: 's_order_details_attributes',
__attribute_md_express: Number(e.newValues.md_express),
__attribute_md_supplier: e.newValues.md_supplier
},
success:function(response){
var t=this;
me.getOrderList().store.load();
var selectedRowIndex=e.grid.getSelectionModel().getCurrentPosition().row;
var selectedRowRecord=e.grid.getStore().getAt(selectedRowIndex);
selectedRowRecord.set('md_express',e.newValues.md_express);
selectedRowRecord.set('md_supplier',e.newValues.md_supplier);
selectedRowRecord.commit();
debugger;
if((e.newValues.md_express != e.originalValues.md_express)) {
if (e.newValues.md_express == true) {
e.row.cells[e.colIdx].childNodes[0].innerText = '{s name=column/express/yes}JA{/s}';
e.row.cells[e.colIdx].classList.add("warning");
} else {
e.row.cells[e.colIdx].childNodes[0].innerText = '{s name=column/express/no}NEIN{/s}';
e.row.cells[e.colIdx].classList.remove("warning");
}
}
}
});
};
options.callback = customCallback;
}
me.callParent([editor, e, store, options]);
}

Answer 1

my solution is
var colIdx = me.getColumnIndex(editor.grid,'md_express');
getColumnIndex: function(grid, dataIndex) {
gridDataIndices = Ext.Array.pluck(grid.columns, 'dataIndex');
return Ext.Array.indexOf(gridDataIndices, dataIndex);
}
this sends back the column index of the given column in my grid.
Found here
how to find column index using dataIndex Extjs 4