ExtJs 4: How do I hide/show grid columns on the fly?

Question

I need to show/hide columns of a grid on the fly, but it seems that ExtJs 4 has no implemented method for that.

In previous versions I should use columnModel, what d

Answer 1

Get access to "your grid" and then

yourGrid.columnManager.getColumns()[index].setVisible(false);

If required do -- EXT 4

parent.doLayout();

EXT 6

parent.updateLayout();