[Reverse Int] StephenGrider#3 Completed

exercises/palindrome/index.js

@@ -36,7 +36,4 @@ function palindrome(str) {
 
 }
 
-module.exports = palindrome;
-
-
-
+module.exports = palindrome;

exercises/reverseint/index.js

@@ -8,6 +8,47 @@
 //   reverseInt(-15) === -51
 //   reverseInt(-90) === -9
 
-function reverseInt(n) {}
+function reverseInt(n) {
+
+      // #1
+
+      // 1.1 Number to String
+      // 1.2 Splits String char into Array items
+      // 1.3 Reverse items in the Array
+      // 1.4 Join/Adds items on Array back into String
+      const rev = n
+            .toString()
+            .split('')
+            .reverse()
+            .join('');
+
+      // Parse String into Number them multiples by 1 or -1 depending on
+      // if the orginal number was postive or negative
+      return parseInt(rev) * Math.sign(n);
+
+
+      // # 2
+      // Uses Array prototypes to solve this problem
+      // This approach is a lot easier to follow / read
+
+      // Determine if the entry is negative or postive
+      const isNeg = Math.sign(n) < 0 ? true : false;
+
+      // Converts Number to String then splits char into Array items 
+      const beginArr = n.toString().split('');
+
+      // Removes '-' neg sign from begining of Array
+      if (isNeg) beginArr.shift();
+
+      // Reverses items in the Array
+      const reverseArr = beginArr.reverse();
+
+      // Inserts '-' neg sign to the begining Array 
+      if (isNeg) reverseArr.unshift('-');
+
+      // Converst String/Array back to Number
+      // Note: Removes 0s in the begining
+      return parseInt(reverseArr.join(''));
+}
 
 module.exports = reverseInt;