diff options
Diffstat (limited to 'src/list_util.sml')
| -rw-r--r-- | src/list_util.sml | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/list_util.sml b/src/list_util.sml index 7f87b87e..fff3e78e 100644 --- a/src/list_util.sml +++ b/src/list_util.sml @@ -29,6 +29,16 @@ structure ListUtil :> LIST_UTIL = struct structure S = Search +fun mapConcat f = + let + fun mc acc ls = + case ls of + [] => rev acc + | h :: t => mc (List.revAppend (f h, acc)) t + in + mc [] + end + fun mapfold f = let fun mf ls s = |