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diff --git a/example/trie_map.cpp b/example/trie_map.cpp
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * Copyright (c) 2020 Kohei Yoshida
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ ************************************************************************/
+
+#include <mdds/trie_map.hpp>
+#include <iostream>
+
+using std::cout;
+using std::endl;
+
+int main()
+{
+    using trie_map_type = mdds::trie_map<mdds::trie::std_string_traits, int>;
+
+    // Cities in North Carolina and their populations in 2013.
+    trie_map_type nc_cities;
+
+    // Insert key-value pairs.
+    nc_cities.insert("Charlotte",     792862);
+    nc_cities.insert("Raleigh",       431746);
+    nc_cities.insert("Greensboro",    279639);
+    nc_cities.insert("Durham",        245475);
+    nc_cities.insert("Winston-Salem", 236441);
+    nc_cities.insert("Fayetteville",  204408);
+    nc_cities.insert("Cary",          151088);
+    nc_cities.insert("Wilmington",    112067);
+    nc_cities.insert("High Point",    107741);
+    nc_cities.insert("Greenville",    89130);
+    nc_cities.insert("Asheville",     87236);
+    nc_cities.insert("Concord",       83506);
+    nc_cities.insert("Gastonia",      73209);
+    nc_cities.insert("Jacksonville",  69079);
+    nc_cities.insert("Chapel Hill",   59635);
+    nc_cities.insert("Rocky Mount",   56954);
+    nc_cities.insert("Burlington",    51510);
+    nc_cities.insert("Huntersville",  50458);
+    nc_cities.insert("Wilson",        49628);
+    nc_cities.insert("Kannapolis",    44359);
+    nc_cities.insert("Apex",          42214);
+    nc_cities.insert("Hickory",       40361);
+    nc_cities.insert("Goldsboro",     36306);
+
+    cout << "Cities that start with 'Cha' and their populations:" << endl;
+    auto results = nc_cities.prefix_search("Cha");
+    for (const auto& kv : results)
+    {
+        cout << "  " << kv.first << ": " << kv.second << endl;
+    }
+
+    cout << "Cities that start with 'W' and their populations:" << endl;
+    results = nc_cities.prefix_search("W");
+    for (const auto& kv : results)
+    {
+        cout << "  " << kv.first << ": " << kv.second << endl;
+    }
+
+    // Create a compressed version of the container.  It works nearly identically.
+    auto packed = nc_cities.pack();
+
+    cout << "Cities that start with 'C' and their populations:" << endl;
+    auto packed_results = packed.prefix_search("C");
+    for (const auto& kv : packed_results)
+    {
+        cout << "  " << kv.first << ": " << kv.second << endl;
+    }
+
+    // Individual search.
+    auto it = packed.find("Wilmington");
+    cout << "Population of Wilmington: " << it->second << endl;
+
+    // You get an end position iterator when the container doesn't have the
+    // specified key.
+    it = packed.find("Asheboro");
+
+    cout << "Population of Asheboro: ";
+
+    if (it == packed.end())
+        cout << "not found";
+    else
+        cout << it->second;
+
+    cout << endl;
+
+    return EXIT_SUCCESS;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */