Tweaks to palindrome article. Linked up Palindrome alg on front page

Author: kelvinlauKL

Palindromes/Palindromes.playground/Contents.swift

@@ -2,10 +2,10 @@ import Cocoa
 
 public func palindromeCheck (text: String?) -> Bool {
   if let text = text {
-    let mutableText = text.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceCharacterSet()).lowercaseString
+    let mutableText = text.stringByTrimmingCharactersInSet(.whitespaceCharacterSet()).lowercaseString
     let length: Int = mutableText.characters.count
 
-    if length < 1 {
+    guard length >= 1 else {
       return false
     }
 

Palindromes/Palindromes.playground/playground.xcworkspace/contents.xcworkspacedata

@@ -2,10 +2,10 @@ import Cocoa
 
 public func palindromeCheck (text: String?) -> Bool {
   if let text = text {
-    let mutableText = text.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceCharacterSet()).lowercaseString
+    let mutableText = text.stringByTrimmingCharactersInSet(.whitespaceCharacterSet()).lowercaseString
     let length: Int = mutableText.characters.count
 
-    if length < 1 {
+    guard length >= 1 else {
       return false
     }
 

Palindromes/Palindromes.swift

@@ -28,10 +28,10 @@ Here is a recursive implementation of this in Swift:
 ```swift
 func palindromeCheck (text: String?) -> Bool {
   if let text = text {
-    let mutableText = text.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceCharacterSet()).lowercaseString
+    let mutableText = text.stringByTrimmingCharactersInSet(.whitespaceCharacterSet()).lowercaseString
     let length: Int = mutableText.characters.count
 
-    if length < 1 {
+    guard length >= 1 {
       return false
     }
 

Palindromes/README.markdown

@@ -183,6 +183,7 @@ A lot of software developer interview questions consist of algorithmic puzzles.
 - [Two-Sum Problem](Two-Sum Problem/)
 - [Fizz Buzz](Fizz Buzz/)
 - [Monty Hall Problem](Monty Hall Problem/)
+- [Finding Palindromes](Palindromes/)
 
 ## Learn more!