From d520c64b645824d9dea7117c2409ee180bb4edff Mon Sep 17 00:00:00 2001
From: koronya <koronya@hanmail.net>
Date: Sat, 18 Apr 2026 03:36:46 +0900
Subject: [PATCH] [JS][6kyu] Function Composition

---
 codewars/6kyu/function-composition/koronya.js | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 codewars/6kyu/function-composition/koronya.js

diff --git a/codewars/6kyu/function-composition/koronya.js b/codewars/6kyu/function-composition/koronya.js
new file mode 100644
index 000000000..ea1e1fb22
--- /dev/null
+++ b/codewars/6kyu/function-composition/koronya.js
@@ -0,0 +1,30 @@
+// [JS][6kyu] Function Composition
+// function-composition
+// https://www.codewars.com/kata/5421c6a2dda52688f6000af8/train/javascript
+
+// prettier-ignore
+const compose = (f, g) => (...args) => f(g(...args))
+
+function compose2(f, g) {
+  return function () {
+    return f(g(...arguments))
+  }
+}
+
+const add = function (a) {
+  return a + 1
+}
+const id = function (a) {
+  return a
+}
+
+compose(add, id)(0)
+
+const add1 = function (a) {
+  return a + 1
+}
+const addAll3 = function (a, b, c) {
+  return a + b + c
+}
+
+compose(add1, addAll3)(1, 2, 3)