ot;'&quot; &lt;&lt; m[4] &lt;&lt; &quot;'\n&quot;;
    
    // Grab string from '10'. Since none is associated,
    // &quot;&quot; will be returned.
    std::cout &lt;&lt; &quot;'&quot; &lt;&lt; m[10] &lt;&lt; &quot;'\n&quot;;
}
</pre>

<H3>Where Defined</H3>

<P>
<a href="../../boost/vector_property_map.hpp"><TT>boost/vector_property_map.hpp</TT></a>

<p>
<H3>Model Of</H3>

<a href="./LvaluePropertyMap.html">Lvalue Property Map</a>

<P>

<H3>Template Parameters</H3>

<P>

<TABLE border>
<TR>
<th>Parameter