chore: update comment

fahimfaisaal · fahimfaisaal · commit 8c54c744a48a · 2022-05-07T17:57:27.000+06:00
diff --git a/String/AlphaNumericPalindrome.js b/String/AlphaNumericPalindrome.js
@@ -21,7 +21,7 @@ const alphaNumericPalindrome = (str) => {
 
   // removing all the special characters and turning everything to lowercase
   const newStr = str.replace(/[^a-z0-9]+/ig, '').toLowerCase()
-  const midIndex = newStr.length >> 1 // x >> y = |x| / 2^y
+  const midIndex = newStr.length >> 1 // x >> y = floor(|x| / 2^y)
 
   for (let i = 0; i < midIndex; i++) {
     if (newStr.at(i) !== newStr.at(~i)) { // ~n = -(n + 1)
