diff --git a/lib/liquid/context.rb b/lib/liquid/context.rb
index 73a6266..307cf2a 100644
--- a/lib/liquid/context.rb
+++ b/lib/liquid/context.rb
@@ -172,6 +172,7 @@ module Liquid
       # Fetches an object starting at the local scope and then moving up the hierachy
       def find_variable(key)
         scope = @scopes.find { |s| s.has_key?(key) }
+        variable = nil
 
         if scope.nil?
           @environments.each do |e|
diff --git a/lib/liquid/htmltags.rb b/lib/liquid/htmltags.rb
index 78424e6..62a5389 100644
--- a/lib/liquid/htmltags.rb
+++ b/lib/liquid/htmltags.rb
@@ -57,7 +57,7 @@ module Liquid
 
           result << "<td class=\"col#{col}\">" << render_all(@nodelist, context) << '</td>'
 
-          if col == cols and not (index == length - 1)
+          if col == cols and (index != length - 1)
             col  = 0
             row += 1
             result << "</tr>\n<tr class=\"row#{row}\">"
diff --git a/lib/liquid/standardfilters.rb b/lib/liquid/standardfilters.rb
index e4d86bb..b189c2b 100644
--- a/lib/liquid/standardfilters.rb
+++ b/lib/liquid/standardfilters.rb
@@ -186,7 +186,7 @@ module Liquid
       else
         input
       end
-    rescue => e
+    rescue
       input
     end
 
diff --git a/lib/liquid/tags/include.rb b/lib/liquid/tags/include.rb
index 3c650f3..e19c373 100644
--- a/lib/liquid/tags/include.rb
+++ b/lib/liquid/tags/include.rb
@@ -48,8 +48,8 @@ module Liquid
         end
 
         if variable.is_a?(Array)
-          variable.collect do |variable|
-            context[@template_name[1..-2]] = variable
+          variable.collect do |var|
+            context[@template_name[1..-2]] = var
             partial.render(context)
           end
         else
diff --git a/lib/liquid/tags/unless.rb b/lib/liquid/tags/unless.rb
index a3d4d08..e561481 100644
--- a/lib/liquid/tags/unless.rb
+++ b/lib/liquid/tags/unless.rb
@@ -9,25 +9,25 @@ module Liquid
   class Unless < If
     def render(context)
       context.stack do
-        
+
         # First condition is interpreted backwards ( if not )
-        block = @blocks.first
-        unless block.evaluate(context)
-          return render_all(block.attachment, context)
+        first_block = @blocks.first
+        unless first_block.evaluate(context)
+          return render_all(first_block.attachment, context)
         end
-        
+
         # After the first condition unless works just like if
         @blocks[1..-1].each do |block|
           if block.evaluate(context)
             return render_all(block.attachment, context)
           end
         end
-        
+
         ''
       end
     end
   end
-  
+
 
   Template.register_tag('unless', Unless)
-end
\ No newline at end of file
+end
diff --git a/lib/liquid/utils.rb b/lib/liquid/utils.rb
index 6058a92..0bf6df2 100644
--- a/lib/liquid/utils.rb
+++ b/lib/liquid/utils.rb
@@ -3,7 +3,6 @@ module Liquid
     def self.slice_collection_using_each(collection, from, to)
       segments = []
       index = 0
-      yielded = 0
 
       # Maintains Ruby 1.8.7 String#each behaviour on 1.9
       return [collection] if non_blank_string?(collection)