Final clean fix for list_ops

u2/list_ops.py

@@ -6,9 +6,9 @@ def append(list1, list2):
         pusti.append(exc)
     return pusti
 
-    def concat(list):
+def concat(lists):
     pusti = []
-    for gns in list:
+    for gns in lists:
         pusti.extend(gns)
     return pusti
 
@@ -28,24 +28,20 @@ def append(list1, list2):
 def map(function, list):
     pusti = []
     for gns in list:
-        function(gns)
         pusti.append(function(gns))
     return pusti
 
-    def foldl(function, accumulator, initial):
+def foldl(function, list, initial):
     accumulator = initial
     for gns in list:
         accumulator = function(accumulator, gns)
     return accumulator
 
-    def foldr(function, initial, acc):
+def foldr(function, list, initial):
     acc = initial
     for gns in list[::-1]:
         acc = function(gns, acc)
     return acc
 
 def reverse(list):
-      pusti = []
+    return list[::-1]
-    for gns in list:
-     pusti.append(gns)
-    return pusti[::-1]