A
Size: a a a
A
JS
AA
JS
\case Nothing -> Seq.empty; Just x -> Seq.singleton xMK
maybe singleton empty жеJS
JS
foldMap pure, кто побьёт?JS
[
[
\case Nothing -> Seq.empty; Just x -> Seq.singleton xJS
MP
pure = Seq.singleton?KV
pure = Seq.singleton?MP
MP
(m <> Map.singleton k (Set.singleton v))[
KV
(m <> Map.singleton k (Set.singleton v))MP
JS
pure = Seq.singleton?AA
\case Nothing -> Seq.empty; Just x -> Seq.singleton x