Great example, one suggestion.

Don’t bother Googling for how to use the WP_List_Table class, rather just use this plugin as an example instead!

Just one suggestion, a function like the one below would reduce the redundancy of having to type out the columns keys.


function get_column_keys(){
$data = $this->get_columns();
unset( $data['cb'] );
foreach( $data as $k => $v ){
$keys[] = $k;
}
return $keys;
}