From cc1aeb7e71560ff63899fca96f59b62b83562aca Mon Sep 17 00:00:00 2001
From: Grzegorz Kucmierz <gkucmierz@gmail.com>
Date: Sun, 1 Dec 2019 23:21:36 +0100
Subject: [PATCH] Amidakuji

---
 amidakuji/index.js | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 amidakuji/index.js

diff --git a/amidakuji/index.js b/amidakuji/index.js
new file mode 100644
index 0000000..f72063d
--- /dev/null
+++ b/amidakuji/index.js
@@ -0,0 +1,12 @@
+// https://www.codewars.com/kata/amidakuji/javascript
+
+function amidakuji(arr) {
+  const swap = (arr, ai, bi) => [arr[ai], arr[bi]] = [arr[bi], arr[ai]];
+  const res = new Array(arr[0].length+1).fill(0).map((_,i)=>i);
+  arr.map((row, ri) => {
+    [...row].map((d, di) => {
+      d === '1' && swap(res, di, di + 1);
+    });
+  });
+  return res;
+}