solve: valid palindrome

Author: JustHm

valid-palindrome/JustHm.swift

@@ -0,0 +1,11 @@
+class Solution {
+    func isPalindrome(_ s: String) -> Bool {
+        let answer = s.lowercased().filter {
+            if $0.isLetter || $0.isNumber {
+                return true
+            }
+            return false
+        }
+        return answer == String(answer.reversed()) ? true : false
+    }
+}