diff options
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 3d4134ea..9e2550ca 100644 --- a/lib/ur/list.ur +++ b/lib/ur/list.ur @@ -44,6 +44,16 @@ fun foldlAbort [a] [b] f = foldlAbort' end +val length = fn [a] => + let + fun length' acc (ls : list a) = + case ls of + [] => acc + | _ :: ls => length' (acc + 1) ls + in + length' 0 + end + val rev = fn [a] => let fun rev' acc (ls : list a) = |