Finish day 11

2 files changed, 26 insertions, 0 deletions

diff --git a/aoc-2020-gleam/src/ext/mapx.gleam b/aoc-2020-gleam/src/ext/mapx.gleam
new file mode 100644
index 0000000..244c1ac
--- /dev/null
+++ b/aoc-2020-gleam/src/ext/mapx.gleam
@@ -0,0 +1,16 @@
+import gleam/map.{Map}
+import gleam/iterator.{Iterator} as iter
+
+pub fn from_iter(iterator: Iterator(#(k, v))) -> Map(k, v) {
+  iter.fold(
+    over: iterator,
+    from: map.new(),
+    with: fn(acc, cur) { map.insert(acc, cur.0, cur.1) },
+  )
+}
+
+pub fn to_iter(map: Map(k, v)) -> Iterator(#(k, v)) {
+  map
+  |> map.to_list
+  |> iter.from_list
+}
diff --git a/aoc-2020-gleam/src/ext/setx.gleam b/aoc-2020-gleam/src/ext/setx.gleam
new file mode 100644
index 0000000..57e368e
--- /dev/null
+++ b/aoc-2020-gleam/src/ext/setx.gleam
@@ -0,0 +1,10 @@
+import gleam/set.{Set}
+import gleam/iterator as iter
+import ext/iteratorx as iterx
+
+pub fn count(set: Set(a), satisfying predicate: fn(a) -> Bool) -> Int {
+  set
+  |> set.to_list
+  |> iter.from_list
+  |> iterx.count(satisfying: predicate)
+}