move to lib and test folder and add rakefile.

2 files changed, 23 insertions, 0 deletions

diff --git a/lib/book.rb b/lib/book.rb
new file mode 100644
index 0000000..56f9c5a
--- /dev/null
+++ b/lib/book.rb
@@ -0,0 +1,9 @@
+class Book
+  attr_reader :title
+  def initialize(title)
+    @title=title
+  end
+  def ==(other)
+    other.kind_of?( Book ) && @title == other.title
+  end
+end
diff --git a/lib/stack.rb b/lib/stack.rb
new file mode 100644
index 0000000..a2b8c04
--- /dev/null
+++ b/lib/stack.rb
@@ -0,0 +1,14 @@
+class Stack
+  def initialize
+    @items = []
+  end
+  def push(item)
+    @items << item
+  end
+  def pop
+    @items.delete_at(-1)
+  end
+  def total_items
+    @items.length
+  end
+end