diff --git a/u2/list_ops.py b/u2/list_ops.py
index 248dc48..ef2f0a2 100644
--- a/u2/list_ops.py
+++ b/u2/list_ops.py
@@ -26,10 +26,16 @@ def length(l):
     return result    
 
 def map(function, list):
-    
+    result = []
+    for item in list
+        result += [function(item)]
+    return result
 
 def foldl(function, list, initial):
-    
+    acc = initial
+    for item in list:
+        acc = function(acc, item)
+    return acc    
 
 def foldr(function, list, initial):