Merge pull request kodecocodes#221 from aliHafizji/palindrome_bug_fix

Palindromes now work with strings with even length

Author: kelvinlauKL

Palindromes/Palindromes.playground/Contents.swift

@@ -5,11 +5,7 @@ public func palindromeCheck(text: String?) -> Bool {
     let mutableText = text.trimmingCharacters(in: NSCharacterSet.whitespaces).lowercased()
     let length: Int = mutableText.characters.count
 
-    guard length >= 1 else {
-      return false
-    }
-    
-    if length == 1 {
+    if length == 1 || length == 0 {
       return true
     } else if mutableText[mutableText.startIndex] == mutableText[mutableText.index(mutableText.endIndex, offsetBy: -1)] {
       let range = Range<String.Index>(mutableText.index(mutableText.startIndex, offsetBy: 1)..<mutableText.index(mutableText.endIndex, offsetBy: -1))
@@ -31,6 +27,8 @@ palindromeCheck(text: "Race fast Safe car")
 // Test to check that palindromes are found regardless of case:
 palindromeCheck(text: "HelloLLEH")
 
+palindromeCheck(text: "moom")
+
 // Test that nil and empty Strings return false:
 palindromeCheck(text: "")
 palindromeCheck(text: nil)

Palindromes/Palindromes.swift

@@ -5,11 +5,7 @@ public func palindromeCheck(text: String?) -> Bool {
     let mutableText = text.trimmingCharacters(in: NSCharacterSet.whitespaces).lowercased()
     let length: Int = mutableText.characters.count
 
-    guard length >= 1 else {
-      return false
-    }
-    
-    if length == 1 {
+    if length == 1 || length == 0 {
       return true
     } else if mutableText[mutableText.startIndex] == mutableText[mutableText.index(mutableText.endIndex, offsetBy: -1)] {
       let range = Range<String.Index>(mutableText.index(mutableText.startIndex, offsetBy: 1)..<mutableText.index(mutableText.endIndex, offsetBy: -1))