added flatten_map

diff --git a/components/extlib/hExtlib.ml b/components/extlib/hExtlib.ml
index 57511db0e5205d7a61bee0f074f3631d88815914..b36a4d89db2630f5d0d192454f706d86fa1054d3 100644 (file)
--- a/components/extlib/hExtlib.ml
+++ b/components/extlib/hExtlib.ml
@@ -135,6 +135,10 @@ let is_alphanum c = is_alpha c || is_digit c
 
 (** {2 List processing} *)
 
+let flatten_map f l =
+  List.flatten (List.map f l)
+;;
+
 let rec list_uniq ?(eq=(=)) = function 
   | [] -> []
   | h::[] -> [h]

diff --git a/components/extlib/hExtlib.mli b/components/extlib/hExtlib.mli
index 52b74429cd0e6909539a2c0b8eb2ed26569ca670..a38b09334c7d2cb677c4e673d911f73441015443 100644 (file)
--- a/components/extlib/hExtlib.mli
+++ b/components/extlib/hExtlib.mli
@@ -78,6 +78,7 @@ val list_uniq:
 val filter_map: ('a -> 'b option) -> 'a list -> 'b list (** filter + map *)
 val list_concat: ?sep:'a list -> 'a list list -> 'a list (**String.concat-like*)
 val list_findopt: ('a -> 'b option) -> 'a list -> 'b option
+val flatten_map: ('a -> 'b list) -> 'a list -> 'b list
 
 (** {2 Debugging & Profiling} *)