how to show/ hide column in a extjs 3 grid panel

Question

I have a grid panel i need to show / hide columns in a grid panel depending on the value of a checkbox. If the checkbox is checked i need to display column in the grid and i

Answer 1

setVisibleColumn       : function(name, flag) {
    name = Ext.Array.from(name);
    var column;

    for (var i = 0; i < name.length; i++) {
        column = this.getColumn(name[i]);
        if (column) {
            flag ? column.show() : column.hide();
        }
    }

}