How to bring back single-column dashboard in WordPress 3.8

Bringing back the single-column dashboard in WordPress 3.8 is pretty easy: just add this code to your theme’s functions.php file.

 // force one-column dashboard 
function shapeSpace_screen_layout_columns($columns) { 	
$columns['dashboard'] = 1; 	
return $columns; } 
add_filter('screen_layout_columns', 'shapeSpace_screen_layout_columns');  
function shapeSpace_screen_layout_dashboard() { return 1; } 
add_filter('get_user_option_screen_layout_dashboard', 'shapeSpace_screen_layout_dashboard');

Thanks to Jeff Starr for the tip!