diff options
Diffstat (limited to 'lib/ur/list.ur')
| -rw-r--r-- | lib/ur/list.ur | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/ur/list.ur b/lib/ur/list.ur index cc533676..95d6fbc8 100644 --- a/lib/ur/list.ur +++ b/lib/ur/list.ur @@ -204,6 +204,21 @@ fun exists [a] f = ex end +fun existsM [m] (_ : monad m) [a] f = + let + fun ex ls = + case ls of + [] => return False + | x :: ls => + b <- f x; + if b then + return True + else + ex ls + in + ex + end + fun foldlMap [a] [b] [c] f = let fun fold ls' st ls = @@ -240,6 +255,21 @@ fun find [a] f = find' end +fun findM [m] (_ : monad m) [a] f = + let + fun find' ls = + case ls of + [] => return None + | x :: ls => + b <- f x; + if b then + return (Some x) + else + find' ls + in + find' + end + fun search [a] [b] f = let fun search' ls = |