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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>NSNull class reference</title> </head> <body> <font face="serif"> <a href="Base.html">Up</a> <br /> <h1><a name="title$NSNull">NSNull class reference</a></h1> <h3>Authors</h3> <dl> <dt>Richard Frith-Macdonald (<a href="mailto:rfm@gnu.org"><code>rfm@gnu.org</code></a>)</dt> <dd> </dd> </dl> <p><b>Copyright:</b> (C) 2000 Free Software Foundation, Inc.</p> <div> </div> <h1><a name="001000000000"> Software documentation for the NSNull class </a></h1> <h2><a name="class$NSNull">NSNull</a> : <a rel="gsdoc" href="NSObject.html#class$NSObject">NSObject</a></h2> <blockquote class="declared"> <dl> <dt><b>Declared in:</b></dt> <dd>Foundation/NSNull.h</dd> </dl> </blockquote> <blockquote> <dl> <dt><b>Conforms to:</b></dt> <dd><a rel="gsdoc" href="NSObject.html#protocol$(NSCoding)">NSCoding</a></dd> <dd><a rel="gsdoc" href="NSObject.html#protocol$(NSCopying)">NSCopying</a></dd> </dl> </blockquote> <div class="availability"> <b>Availability:</b> MacOS-X 10.0.0</div> <br /> <div class="desc"> An object to use as a placeholder - in collections for instance. </div> <b>Method summary</b> <ul> <li><a rel="gsdoc" href="NSNull.html#method$NSNull+null">+null</a></li> </ul> <hr width="50%" align="left" /> <div class="method"> <h3><a name="method$NSNull+null">null </a></h3> + (<a rel="gsdoc" href="#class$NSNull">NSNull</a>*) <b>null</b>;<br /> <div class="availability"> <b>Availability:</b> MacOS-X 10.0.0</div> <br /> <div class="desc"> Return an object that can be used as a placeholder in a collection. This method always returns the same object. </div> <hr width="25%" align="left" /> </div> <br /> <a href="Base.html">Up</a> </font> </body> </html>