From c4372e5b3d64d1b08cf9b00d0845141bbee753f6 Mon Sep 17 00:00:00 2001
From: Tomasz Chojnacki <tomaszchojnacki2001@gmail.com>
Date: Sun, 19 Feb 2023 20:42:51 +0100
Subject: Finish day 3

---
 aoc-2020-gleam/src/ext/iteratorx.gleam | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 aoc-2020-gleam/src/ext/iteratorx.gleam

(limited to 'aoc-2020-gleam/src/ext')

diff --git a/aoc-2020-gleam/src/ext/iteratorx.gleam b/aoc-2020-gleam/src/ext/iteratorx.gleam
new file mode 100644
index 0000000..456c1d1
--- /dev/null
+++ b/aoc-2020-gleam/src/ext/iteratorx.gleam
@@ -0,0 +1,14 @@
+import gleam/iterator.{Iterator} as iter
+import gleam/list
+
+pub fn length(iterator: Iterator(a)) -> Int {
+  iterator
+  |> iter.to_list
+  |> list.length
+}
+
+pub fn count(iterator: Iterator(a), satisfying predicate: fn(a) -> Bool) -> Int {
+  iterator
+  |> iter.filter(for: predicate)
+  |> length
+}
-- 
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