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| author |  Adam Chlipala <adamc@hcoop.net> | 2010-06-13 14:13:47 -0400 |
|---|---|---|
| committer | Adam Chlipala <adamc@hcoop.net> | 2010-06-13 14:13:47 -0400 |
| commit | 5f341ee6866e51c5f528084d601678b91a0d6908 (patch) | |
| tree | 7853299e0060cd6c6eea28a26aa4ee33b1b93c21 /lib/ur/list.ur | |
| parent | fdce2b90afbf31a31b312e52c0fc97434e9638a8 (diff) | |
List.mapi
Diffstat (limited to 'lib/ur/list.ur')
| -rw-r--r-- | lib/ur/list.ur | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/ur/list.ur b/lib/ur/list.ur index bccbc82a..bb814714 100644 --- a/lib/ur/list.ur +++ b/lib/ur/list.ur @@ -101,6 +101,16 @@ fun mp [a] [b] f = mp' [] end +fun mapi [a] [b] f = + let + fun mp' n acc ls = + case ls of + [] => rev acc + | x :: ls => mp' (n + 1) (f n x :: acc) ls + in + mp' 0 [] + end + fun mapPartial [a] [b] f = let fun mp' acc ls = |