category breakdown

require 'rubygems'
require 'rspec'

def split(original)
  original.split("/").inject([]) do |result, element|
    result + [(result.last||[]) + [element]]
  end.reverse.map{ |variation| variation.join("/") }
end




describe "#category" do
  it "should split the categories out" do
    split("bc6/energy/fuel/organic").should == ["bc6/energy/fuel/organic", "bc6/energy/fuel", "bc6/energy", "bc6"]
  end
end



  def category=(cat)
    temp_cat = cat.clone
    self.categories = 3.upto(temp_cat.split("/").length).collect do |variable|
      temp_cat = temp_cat.split("/").tap(&:pop).join("/")
    end.insert(0,cat)
  end