diff --git a/src/main/java/com/googlecode/aviator/AviatorEvaluator.java b/src/main/java/com/googlecode/aviator/AviatorEvaluator.java
index e0cd1138..882fc6e0 100644
--- a/src/main/java/com/googlecode/aviator/AviatorEvaluator.java
+++ b/src/main/java/com/googlecode/aviator/AviatorEvaluator.java
@@ -93,12 +93,12 @@ public final class AviatorEvaluator {
     private static AviatorClassLoader aviatorClassLoader;
 
     /**
-     * Optimized for compile speed,this is the default option
+     * Optimized for compile speed
      */
     public static final int COMPILE = 0;
 
     /**
-     * Optimized for execute speed
+     * Optimized for execute speed,this is the default option
      */
     public static final int EVAL = 1;
 
@@ -234,9 +234,10 @@ public AviatorClassLoader run() {
 
 
     /**
-     * set optimize level,default AviatorEvaluator.COMPILE
+     * set optimize level,default AviatorEvaluator.EVAL
      * 
-     * @see COMPILE,EVAL
+     * @see #COMPILE
+     * @see #EVAL
      * 
      * @param value
      */
diff --git a/src/main/java/com/googlecode/aviator/BaseExpression.java b/src/main/java/com/googlecode/aviator/BaseExpression.java
index e8921e5d..6d78f03f 100644
--- a/src/main/java/com/googlecode/aviator/BaseExpression.java
+++ b/src/main/java/com/googlecode/aviator/BaseExpression.java
@@ -1,5 +1,7 @@
 package com.googlecode.aviator;
 
+import java.util.ArrayList;
+import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
 
@@ -17,7 +19,15 @@ public abstract class BaseExpression implements Expression {
 
     public BaseExpression(List<String> varNames) {
         super();
-        this.varNames = varNames;
+        LinkedHashSet<String> tmp = new LinkedHashSet<String>(varNames.size());
+        // process nested names
+        for (String name : varNames) {
+            if (name.contains(".")) {
+                name = name.substring(0, name.indexOf("."));
+            }
+            tmp.add(name);
+        }
+        this.varNames = new ArrayList<String>(tmp);
     }
 
 
diff --git a/src/main/java/com/googlecode/aviator/code/OptimizeCodeGenerator.java b/src/main/java/com/googlecode/aviator/code/OptimizeCodeGenerator.java
index 7bd85f56..7bbf61a7 100644
--- a/src/main/java/com/googlecode/aviator/code/OptimizeCodeGenerator.java
+++ b/src/main/java/com/googlecode/aviator/code/OptimizeCodeGenerator.java
@@ -331,6 +331,18 @@ public Expression getResult() {
                         }
                     }
                 }
+                else if (delegateToken.getDelegateTokenType() == DelegateTokenType.Array) {
+                    Token<?> realToken = delegateToken.getToken();
+                    if (realToken.getType() == TokenType.Variable) {
+                        varName = token.getLexeme();
+                        if (!variables.containsKey(varName)) {
+                            variables.put(varName, 1);
+                        }
+                        else {
+                            variables.put(varName, variables.get(varName) + 1);
+                        }
+                    }
+                }
                 break;
             }
         }
diff --git a/src/test/java/com/googlecode/aviator/AviatorEvaluatorUnitTest.java b/src/test/java/com/googlecode/aviator/AviatorEvaluatorUnitTest.java
index a6109fca..a180eeec 100644
--- a/src/test/java/com/googlecode/aviator/AviatorEvaluatorUnitTest.java
+++ b/src/test/java/com/googlecode/aviator/AviatorEvaluatorUnitTest.java
@@ -47,20 +47,34 @@ public void testExec() {
         String exp1 = "b-c+a";
         String exp2 = "2*3.14*(R-r)+b/c";
         String exp3 = "f>d?k:a";
+        String exp4 = "map.a > map.b ? list[0][1]: y";
         assertEquals(8, AviatorEvaluator.exec(exp1, 6, 2, 4));
         assertEquals(104, AviatorEvaluator.exec(exp1, 99, 3, 8));
         assertEquals(1.14d, AviatorEvaluator.exec(exp1, 3.14, 3, 1));
         assertEquals(6.28, AviatorEvaluator.exec(exp2, 4, 3, 0, 100));
         assertEquals(13.304d, AviatorEvaluator.exec(exp2, 5, 3.2, 4, 2.0));
         assertEquals(3.14d, AviatorEvaluator.exec(exp3, 2, 1, 3.14, 9));
-        assertEquals(9, AviatorEvaluator.exec(exp3,1,2,3.14,9));
+        assertEquals(9, AviatorEvaluator.exec(exp3, 1, 2, 3.14, 9));
+
+        Map<String, Integer> map = new HashMap<String, Integer>();
+        map.put("a", 100);
+        map.put("b", 99);
+        int[][] list = new int[1][2];
+        list[0]=new int[2];
+        list[0][1] = 2000;
+        int y = 999;
+        assertEquals(2000L, AviatorEvaluator.exec(exp4, map, list, y));
+        map.put("a", 99);
+        assertEquals(999L, AviatorEvaluator.exec(exp4, map, list, y));
     }
 
-    @Test(expected=IllegalArgumentException.class)
+
+    @Test(expected = IllegalArgumentException.class)
     public void testExecIllegalArguments() {
-        AviatorEvaluator.exec("a-b+c",1,2);
+        AviatorEvaluator.exec("a-b+c", 1, 2);
     }
 
+
     @Test
     public void testCompileCache() {
         Expression exp1 = AviatorEvaluator.compile("1+3", true);
diff --git a/src/test/java/com/googlecode/aviator/test/function/FunctionTest.java b/src/test/java/com/googlecode/aviator/test/function/FunctionTest.java
index e84e4351..07a98935 100644
--- a/src/test/java/com/googlecode/aviator/test/function/FunctionTest.java
+++ b/src/test/java/com/googlecode/aviator/test/function/FunctionTest.java
@@ -447,6 +447,20 @@ public void testGetVariableNames() {
         assertEquals("e", vars.get(3));
         assertEquals("c", vars.get(4));
 
+        // Test map or list as variable
+        expression = AviatorEvaluator.compile("map.a>10 && list[0][1]<3 && bean.c == bean.x || bean.d == y", true);
+        assertNotNull(expression);
+        vars = expression.getVariableNames();
+        assertEquals(4, vars.size());
+        assertTrue(vars.contains("map"));
+        assertTrue(vars.contains("list"));
+        assertTrue(vars.contains("bean"));
+        assertTrue(vars.contains("y"));
+        assertEquals("map", vars.get(0));
+        assertEquals("list", vars.get(1));
+        assertEquals("bean", vars.get(2));
+        assertEquals("y", vars.get(3));
+
     }