Custom controller for the table sorting blog post

TableSortingCtrl.cls

public with sharing class TableSortingCtrl {
	public List<Account> accounts {get; set;}
	
	public TableSortingCtrl()
	{
		accounts=[select id, CreatedDate, Name, BillingStreet, 
							BillingState, BillingCity, 
							BillingPostalCode, BillingCountry 
		 		  from Account
				  where BillingPostalCode!=null 
				  limit 10];
	}
}