From 9eb942909e9ddbda53e1ea2bfeda162812e2b38b Mon Sep 17 00:00:00 2001
From: Hifilo <92943726+Hifilo@users.noreply.github.com>
Date: Wed, 22 Mar 2023 21:42:17 -0400
Subject: [PATCH] 09 Palindromes: Replace Regex Solution (#319)

* Replaces the original regex method, with more familiar methods
* Add descriptive comments for clarity
---
 palindromes/palindromes.js | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/palindromes/palindromes.js b/palindromes/palindromes.js
index 5c41da4..dd9e277 100644
--- a/palindromes/palindromes.js
+++ b/palindromes/palindromes.js
@@ -1,11 +1,14 @@
-const palindromes = function(string) {
-  const processedString = string.toLowerCase().replace(/[^a-z]/g, "");
-  return (
-    processedString
-      .split("")
-      .reverse()
-      .join("") == processedString
-  );
+// Non regex
+const palindromes = function (string) {
+	let alphabet = 'abcdefghijklmnopqrstuvwxyz'; 				//Create a variable that holds all the letters of the alphabet
+	const cleanedString = string 						// Convert to lowercase, split, & filter only letters, rejoin as new const
+		.toLowerCase()
+		.split('')
+		.filter((letter) => alphabet.includes(letter))
+		.join('');
+	const reversedString = cleanedString.split('').reverse().join(''); 	//Create a new const that holds reversed string
+	return cleanedString === reversedString; 				//Compare cleanedString & reversedString which returns true/false
 };
 
+// Do not edit below this line
 module.exports = palindromes;