valid palindrome

Author: sounmind

valid-palindrome/sounmind.ts

@@ -0,0 +1,16 @@
+function isPalindrome(s: string): boolean {
+  const filteredString = s.replace(/[^a-zA-Z0-9]/g, "").toUpperCase();
+
+  let [left, right] = [0, filteredString.length - 1];
+
+  while (left <= right) {
+    if (filteredString[left] !== filteredString[right]) {
+      return false;
+    }
+
+    left += 1;
+    right -= 1;
+  }
+
+  return true;
+}