Add palindrome checker certification project

2-javascript-algorithms-datastructures/1-palindrome-checker.js

@@ -0,0 +1,18 @@
+function reverseString(str){
+    return str.split("").reverse().join("")
+}
+
+function cleanUpString(str){
+    return str.replaceAll(/[^a-zA-Z0-9]/g, "").toLowerCase()
+}
+function palindrome(str) {
+    str = cleanUpString(str);
+    let checkstring = reverseString(str);
+    return checkstring === (str);
+}
+
+let test1 = palindrome("eye"); //true
+let test2 = palindrome("A man, a plan, a canal. Panama");//true
+let test3 = palindrome("not a palindrome");//false
+let test4 = palindrome("0_0 (: /-\ :) 0-0")//true
+console.log(test1, test2, test3, test4)