lib/ImmutableStack.rb in maroon-0.7.1 vs lib/ImmutableStack.rb in maroon-0.8.0

@@ -1,35 +1,21 @@
 class ImmutableStack
-  def pop()
-    [@head, @tail]
-  end
+      def pop() [@head, @tail] end
+ def push(element) ImmutableStack.new(element, self) end
+ def self.empty() @empty ||= self.new(nil, nil) end
+ def each() yield(head)
+t = tail
+while t.!=(ImmutableStack.empty) do
+  h, t = t.pop
+  yield(h)
+end
+ end
+ def initialize(h,t) @head = h
+@tail = t
+self.freeze
+ end
+     private
 
-  def push(element)
-    ImmutableStack.new(element, self)
-  end
 
-  def self.empty()
-    @@empty ||= self.new(nil, nil)
-  end
+attr_reader :head, :tail
 
-  def each()
-    yield(head)
-    t = tail
-    while t.!=(ImmutableStack.empty) do
-      h, t = t.pop
-      yield(h)
-    end
-  end
-
-  def initialize(h, t)
-    @head = h
-    @tail = t
-    self.freeze
-  end
-
-  private
-
-
-  attr_reader :head
-  attr_reader :tail
-
-end
+           end
\ No newline at end of file