list:range

1 files changed, 13 insertions, 1 deletions

diff --git a/gen/src/list.erl b/gen/src/list.erl
index 36fb42d..85df70e 100644
--- a/gen/src/list.erl
+++ b/gen/src/list.erl
@@ -1,7 +1,7 @@
 -module(list).
 -compile(no_auto_import).
 
--export([length/1, reverse/1, is_empty/1, contains/2, head/1, tail/1, filter/2, map/2, index_map/2, traverse/2, drop/2, take/2, new/0, append/2, flatten/1, fold/3, fold_right/3, find/2, all/2, any/2, zip/2, intersperse/2, at/2, unique/1, sort/1]).
+-export([length/1, reverse/1, is_empty/1, contains/2, head/1, tail/1, filter/2, map/2, index_map/2, traverse/2, drop/2, take/2, new/0, append/2, flatten/1, fold/3, fold_right/3, find/2, all/2, any/2, zip/2, intersperse/2, at/2, unique/1, sort/1, range/2]).
 
 length(A) ->
     erlang:length(A).
@@ -298,3 +298,15 @@ sort(List) ->
             BList = drop(List, SplitLength),
             merge_sort(sort(AList), sort(BList))
     end.
+
+range(Start, Stop) ->
+    case int:compare(Start, Stop) of
+        eq ->
+            [];
+
+        gt ->
+            [Start | range(Start - 1, Stop)];
+
+        lt ->
+            [Start | range(Start + 1, Stop)]
+    end.