copy a map into another map
<p>I have a map like this:</p>

<pre><code>map&lt;prmNode,vector&lt;prmEdge&gt;,prmNodeComparator&gt; nodo2archi;
</code></pre>

<p>I need to have an identical copy of this map. How is the fast way to make this?
I have tried this: </p>

<pre><code>map&lt;prmNode,vector&lt;prmEdge&gt;,prmNodeComparator&gt; copiamap( nodo2archi );
</code></pre>

<p>but it doesn't work. The copiamap is empty.
Thank you very much</p>
