From 7e0b6d629a073081b3569efa638d6e75dfb7ee7a Mon Sep 17 00:00:00 2001
From: koronya <koronya@hanmail.net>
Date: Sat, 25 Jul 2026 03:10:21 +0900
Subject: [PATCH] [JS][7kyu] All Star Code Challenge #16

---
 .../all-star-code-challenge-16/koronya.js     | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 codewars/7kyu/all-star-code-challenge-16/koronya.js

diff --git a/codewars/7kyu/all-star-code-challenge-16/koronya.js b/codewars/7kyu/all-star-code-challenge-16/koronya.js
new file mode 100644
index 000000000..f9fd6c635
--- /dev/null
+++ b/codewars/7kyu/all-star-code-challenge-16/koronya.js
@@ -0,0 +1,25 @@
+// [JS][7kyu] All Star Code Challenge #16
+// all-star-code-challenge-16
+// https://www.codewars.com/kata/586566b773bd9cbe2b000013/train/javascript
+
+const noRepeat = (str) => {
+  let index = 0
+  const strMap = new Map()
+  str.split('').forEach((char) => {
+    strMap.set(char, (strMap.get(char) || 0) + 1)
+  })
+  let result = ''
+  ;[...strMap].some(([char, count]) => {
+    if (count === 1) {
+      result = char
+      return true
+    }
+    return false
+  })
+  return result
+}
+
+noRepeat('aabbccdde') === 'e'
+noRepeat('wxyz') === 'w'
+noRepeat('testing') === 'e'
+