added list_mapi

[helm.git] / helm / software / components / extlib / hExtlib.ml

diff --git a/helm/software/components/extlib/hExtlib.ml b/helm/software/components/extlib/hExtlib.ml
index c2de58f810fe99728b5b13253135c12934e02bec..fe587e297c50b5631d992852e12b2ae9bc84486c 100644 (file)
--- a/helm/software/components/extlib/hExtlib.ml
+++ b/helm/software/components/extlib/hExtlib.ml
@@ -140,6 +140,14 @@ let flatten_map f l =
   List.flatten (List.map f l)
 ;;
 
+let list_mapi f l =
+  let rec aux k = function
+    | [] -> []
+    | h::tl -> f h k :: aux (k+1) tl
+  in
+     aux 0 l
+;;
+
 let rec list_uniq ?(eq=(=)) = function 
   | [] -> []
   | h::[] -> [h]