group consecutive models

gistfile1.rb

# elements = [{name: "story"}, {name: "social"}, {name: "article"}, {name: "article"}, {name: "story"}, {name: "story"}, {name: "article"}]
# group_consecutive_elements("article", elements)

def group_consecutive_elements(name, elements)
  grouped_elements = []
  elements.chunk{ |e| e.name == name }.each{ |name, ary| grouped_elements.push((name and ary.length > 1) ? [ary] : ary) }
  grouped_elements.flatten!(1)
  grouped_elements
end

# => [{name: "story"}, {name: "social"}, [{name: "article"}, {name: "article"}], {name: "story"}, {name: "story"}, {name: "article"}]