lib/nanoc/helpers/blogging.rb in nanoc-3.6.11 vs lib/nanoc/helpers/blogging.rb in nanoc-3.7.0

@@ -26,21 +26,32 @@
     # Returns an unsorted list of articles, i.e. items where the `kind`
     # attribute is set to `"article"`.
     #
     # @return [Array] An array containing all articles
     def articles
-      @items.select { |item| item[:kind] == 'article' }
+      blk = lambda { @items.select { |item| item[:kind] == 'article' } }
+      if @items.frozen?
+        @article_items ||= blk.call
+      else
+        blk.call
+      end
     end
 
     # Returns a sorted list of articles, i.e. items where the `kind`
     # attribute is set to `"article"`. Articles are sorted by descending
     # creation date, so newer articles appear before older articles.
     #
     # @return [Array] A sorted array containing all articles
     def sorted_articles
-      articles.sort_by do |a|
-        attribute_to_time(a[:created_at])
-      end.reverse
+      blk = lambda do
+        articles.sort_by { |a| attribute_to_time(a[:created_at]) }.reverse
+      end
+
+      if @items.frozen?
+        @sorted_article_items ||= blk.call
+      else
+        blk.call
+      end
     end
 
     class AtomFeedBuilder
 
       include Nanoc::Helpers::Blogging