From 4e38ab5331b6cf6f53c0477563ee4a8318ac02b8 Mon Sep 17 00:00:00 2001
From: shahayush480 <shahayush480@gmail.com>
Date: Sat, 30 Sep 2023 14:40:27 +0530
Subject: [PATCH] fix: #758  optimised armstrongNumber code

---
 Maths/ArmstrongNumber.js | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/Maths/ArmstrongNumber.js b/Maths/ArmstrongNumber.js
index a3ab78299f..8f861d8c15 100644
--- a/Maths/ArmstrongNumber.js
+++ b/Maths/ArmstrongNumber.js
@@ -9,16 +9,13 @@
  */
 
 const armstrongNumber = (num) => {
-  if (num < 0 || typeof num !== 'number') return false
-
-  let newSum = 0
-
-  const numArr = num.toString().split('')
-  numArr.forEach((num) => {
-    newSum += parseInt(num) ** numArr.length
-  })
-
-  return newSum === num
+  if (typeof num !== 'number' || num < 0) return false
+  const numStr = num.toString()
+  const sum = [...numStr].reduce(
+    (acc, digit) => acc + parseInt(digit) ** numStr.length,
+    0
+  )
+  return sum === num
 }
 
 export { armstrongNumber }