// // $Id$ // // SPObjectAdditions.m // sequel-pro // // Created by Rowan Beentje (rowan.beent.je) on February 22, 2012 // Copyright (c) 2012 Rowan Beentje. All rights reserved. // // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 2 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA // // More info at <http://code.google.com/p/sequel-pro/> @implementation NSObject (SPObjectAdditions) /** * Detect whether an object is a NSNull instance */ - (BOOL)isNSNull { id const null = [NSNull null]; // [NSNull null] is documented as being a singleton class so a pointer equality // check is possible - and much faster than checking class membership. return (self == null); } @end