palindrome finished

lib/palindrome_check.rb

@@ -1,5 +1,72 @@
 # A method to check if the input string is a palindrome.
 # Return true if the string is a palindrome. Return false otherwise.
+
+###all spaces must be ignored!!!
+
 def palindrome_check(my_phrase)
-  raise NotImplementedError
+  # raise NotImplementedError
+  return false if my_phrase == nil
+  return true if my_phrase.length == 1
+
+  i = 0
+  j = my_phrase.length - 1
+
+  # puts palindrome_check("han nah  ")
+
+  while i < j do
+    if my_phrase[i] == my_phrase[j]
+      i += 1
+
+      until my_phrase[i] != " " do
+        i += 1
+      end
+
+      j -= 1
+
+      until my_phrase[j] != " " do
+        j -= 1
+      end
+
+    else
+      return false
+    end
+
+  end
+    return true
+
+  # --> check to see if my_phrase[i] is equal to my-phrase[j] x
+  #   --> return false when no match x
+  #     --> if [i] or [j] is a space,
+  #        increment
+  #       --> if i is greater than j, return true x
+#   check = ""
+#
+#   puts check += my_phrase
+#
+#   return check == string_reverse(my_phrase) ? true : false
 end
+#
+# ##string reverse helper method
+# def string_reverse(my_string)
+#   # my_string << "not implemented"
+#   return nil if my_string == nil
+#   return "" if my_string == ""
+#
+#   i = my_string.length - 1
+#   j = 0
+#
+#   while j < i do
+#     temp = my_string[i]
+#     my_string[i] = my_string[j]
+#     my_string[j] = temp
+#     i -= 1
+#     j += 1
+#   end
+#   return my_string
+# end
+
+
+
+puts palindrome_check(" pull   up ") #=> true
+puts palindrome_check("hannah")
+puts palindrome_check("leanne")