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<HTML><HEAD><TITLE>LinkedList Properties</TITLE></HEAD><BODY bgcolor="#FFFFFF"> <a href="../index.html" target="_top"><img src="../icons/usins.gif" alt="Logo" align=right></a><b>Data Structures and Algorithms with Object-Oriented Design Patterns in Python</b><br><A NAME="tex2html2390" HREF="page103.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="../icons/next_motif.gif"></A> <A NAME="tex2html2388" HREF="page97.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="../icons/up_motif.gif"></A> <A NAME="tex2html2382" HREF="page101.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="../icons/previous_motif.gif"></A>  <A NAME="tex2html2392" HREF="page611.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="../icons/index_motif.gif"></A> <BR><HR><H2><A NAME="SECTION004350000000000000000"><tt>LinkedList</tt> Properties</A></H2><P>Three <tt>LinkedList</tt> properties are defined in Program&nbsp;<A HREF="page102.html#proglinkedListd"><IMG  ALIGN=BOTTOM ALT="gif" SRC="../icons/cross_ref_motif.gif"></A>.The <tt>head</tt> and <tt>tail</tt> propertiesprovide accessors for the corresponding instance attributes of <tt>LinkedList</tt>.The <tt>isEmpty</tt> property provides an accessorthat returns a <tt>bool</tt> resultwhich indicates whether the list is empty.Clearly, the running time of each accessor is <I>O</I>(1).<P><P><A NAME="4140">&#160;</A><A NAME="proglinkedListd">&#160;</A> <IMG WIDTH=575 HEIGHT=409 ALIGN=BOTTOM ALT="program3866" SRC="img631.gif"  ><BR><STRONG>Program:</STRONG> <tt>LinkedList</tt> class properties.<BR><P><HR><A NAME="tex2html2390" HREF="page103.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="../icons/next_motif.gif"></A> <A NAME="tex2html2388" HREF="page97.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="../icons/up_motif.gif"></A> <A NAME="tex2html2382" HREF="page101.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="../icons/previous_motif.gif"></A>  <A NAME="tex2html2392" HREF="page611.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="../icons/index_motif.gif"></A> <P><ADDRESS><img src="../icons/bruno.gif" alt="Bruno" align=right><a href="../copyright.html">Copyright &#169; 2003</a> by <a href="../signature.html">Bruno R. Preiss, P.Eng.</a>  All rights reserved.</ADDRESS></BODY></HTML>

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