[Palindrome] StephenGrider#2 Completed

exercises/palindrome/index.js

@@ -7,6 +7,36 @@
 //   palindrome("abba") === true
 //   palindrome("abcdefg") === false
 
-function palindrome(str) {}
+/**
+ * Given a string, return true if the string is a palindrome
+ * or false if it is not.
+ * @param {string} str 
+ * @returns {boolean}
+ */
+function palindrome(str) {
+
+      /**
+       * Solution #1:
+       *  `Array.prototype.reverse()` === str
+       */
+      const reversed = str
+            .split('')
+            .reverse()
+            .join('');
+      return str === reversed;
+
+      /**
+       * Solution #2: 
+       * `Array.prototype.every()` not ideal because it does twice the work. 
+       * [@link](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/every)
+       */
+
+      return str.split('').every((char, i) => char === str[str.length - i - 1])
+
+
+}
 
 module.exports = palindrome;
+
+
+

exercises/reversestring/index.js

@@ -4,15 +4,20 @@
 // --- Examples
 //   reverse('apple') === 'leppa'
 //   reverse('hello') === 'olleh'
-   reverse('Greetings!') === '!sgniteerG'
-
+//   reverse('Greetings!') === '!sgniteerG'
 
 
+/**
+ * Given a string, return a new string with the reversed 
+ * order of characters
+ * @param {string} str 
+ * @returns {string}
+ */
 function reverse(str) {
       /**
        * Solution #1:
-       * Array.prototype.reverse()
-       * @link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reverse
+       * `Array.prototype.reverse()`
+       * [@link](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reverse)
       */
       return str.split('').reverse().join('');
 
@@ -32,8 +37,8 @@ function reverse(str) {
 
       /**
        * Solution #3:
-       * Array.prototype.reduce()
-       * @link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce
+       * `Array.prototype.reduce()`
+       * [@link](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce)
       */
       return str.split('').reduce((rev, char) => char + rev, '');