From 1da3271c85161e82e1762c2178be32baa3af5af9 Mon Sep 17 00:00:00 2001
From: Leanne Rivera <rivera.leanne+ada@gmail.com>
Date: Mon, 29 Oct 2018 17:04:49 -0700
Subject: [PATCH] all tests passed, int palindrome = done.

---
 README.md                       |  2 +-
 lib/integer_palindrome_check.rb | 39 ++++++++++++++++++++++++++++++++-
 2 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index ff11a32..5530bb9 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # Integer Palindrome Check
-Check if the digits in a non-negtive integer form a palindrome.
+Check if the digits in a non-negative integer form a palindrome.
 
 ## Exercise
 * Design and implement a method that checks if the digits in the input positive integer forms a palindrome. The method returns true if the digits in the input form a palindrome. The method returns false otherwise.
diff --git a/lib/integer_palindrome_check.rb b/lib/integer_palindrome_check.rb
index dd4deea..bd99404 100644
--- a/lib/integer_palindrome_check.rb
+++ b/lib/integer_palindrome_check.rb
@@ -1,4 +1,41 @@
 # Returns true if the input positive integer number forms a palindrome. Returns false otherwise.
 def is_palindrome(number)
-  raise NotImplementedError
+  # raise NotImplementedError
+  return false if number == nil ||  number < 0 
+  return true if number < 10 || number == 0
+
+  i = number
+  num = []
+  num_reverse = []
+
+  while i > 0 #while it is a pos num
+    digit = i % 10 #digit is the number modulo 10
+    i /= 10 #divide i by 10 to remove or 'pop' last digit
+    num_reverse << digit #push digit to reverse array
+    num << digit #shovel digit to num array (to be reversed below)
+  end
+
+  num = array_reverse(num)
+
+  return num == num_reverse ? true : false
+
 end
+
+#helper method for reversing array
+def array_reverse(array)
+  i = array.length - 1
+  j = 0
+
+  while j < i do
+    temp = array[i]
+    array[i] = array[j]
+    array[j] = temp
+    i -= 1
+    j += 1
+  end
+  return array
+end
+
+is_palindrome(1001)
+
+# [[log-base10(100) = 2] = [10 * 10 = 100]]