--- a/src/luan/modules/BasicLuan.java	Wed Aug 02 15:19:47 2017 -0600
+++ b/src/luan/modules/BasicLuan.java	Wed Aug 02 17:37:59 2017 -0600
@@ -7,6 +7,8 @@
 import java.util.Map;
 import java.util.List;
 import java.util.ArrayList;
+import java.util.Set;
+import java.util.Arrays;
 import luan.Luan;
 import luan.LuanState;
 import luan.LuanTable;
@@ -248,4 +250,47 @@
 		}
 	}
 
+	public static Object to_luan(Object obj) throws LuanException {
+		if( !type(obj).equals("java") )
+			return obj;
+		LuanTable tbl = new LuanTable();
+		if( obj instanceof Map ) {
+			Map map = (Map)obj;
+			for( Object stupid : map.entrySet() ) {
+				Map.Entry entry = (Map.Entry)stupid;
+				Object key = entry.getKey();
+				Object value = entry.getValue();
+				if( key != null && value != null )
+					tbl.rawPut(to_luan(key),to_luan(value));
+			}
+			return tbl;
+		}
+		if( obj instanceof Set ) {
+			Set set = (Set)obj;
+			for( Object el : set ) {
+				if( el != null )
+					tbl.rawPut(to_luan(el),Boolean.TRUE);
+			}
+			return tbl;
+		}
+		List list;
+		if( obj instanceof List ) {
+			list = (List)obj;
+		} else {
+			Class cls = obj.getClass();
+			if( cls.isArray() && !cls.getComponentType().isPrimitive() ) {
+				Object[] a = (Object[])obj;
+				list = Arrays.asList(a);
+			} else
+				throw new LuanException("can't convert type "+obj.getClass().getName()+" to luan");
+		}
+		int n = list.size();
+		for( int i=0; i<n; i++ ) {
+			Object val = list.get(i);
+			if( val != null )
+				tbl.rawPut(i+1,to_luan(val));
+		}
+		return tbl;
+	}
+
 }