Update none.md

snippets/none.md

@@ -5,15 +5,11 @@ tags: list,function,intermediate
 
 Returns `False` if the provided function returns `True` for at least one element in the list, `True` otherwise.
 
-Iterate over the elements of the list to test if every element in the list returns `False` based on `fn`.
-Omit the seconds argument, `fn`, to check if all elements are `False`.
+Use `all()` in combination with `map()` and `fn` to check if `fn` returns `False` for all the elements in the list.
 
 ```py
-def none(lst, fn=lambda x: not not x):
-  for el in lst:
-    if fn(el):
-      return False
-  return True
+def none(lst, fn=lambda x: x):
+  return all(map(lambda x: not fn(x), lst))
 ```
 
 ```py