1 files changed, 16 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/array.rb b/activesupport/lib/active_support/core_ext/array.rb
index ddf2a369c1..897d73866c 100644
--- a/activesupport/lib/active_support/core_ext/array.rb
+++ b/activesupport/lib/active_support/core_ext/array.rb
@@ -2,4 +2,20 @@ require File.dirname(__FILE__) + '/array/conversions'
 
 class Array #:nodoc:
   include ActiveSupport::CoreExtensions::Array::Conversions
+
+  # Iterate over an array in groups of a certain size, padding any remaining 
+  # slots with specified value (<tt>nil</tt> by default).
+  # 
+  # E.g.
+  # 
+  #   %w(1 2 3 4 5 6 7).in_groups_of(3) {|g| p g}
+  #   ["1", "2", "3"]
+  #   ["4", "5", "6"]
+  #   ["7", nil, nil]
+  def in_groups_of(number, fill_with = nil, &block)
+    require 'enumerator'
+    collection = dup
+    collection << fill_with until collection.size.modulo(number).zero?
+    collection.each_slice(number, &block)
+  end
 end