Arrayの中のHashの特定条件時にキーとバリューを加える

add_to_hash.rb

items = [{:title => "a", :price => 70},
     {:title => "b", :price => 200},
     {:title => "c", :price => 50}]
items.each do |item|
  item[:special] = 'Low price!' if item[:price] < 100
end

#[{:title=>"a", :price=>70, :special=>"Low price!"},
# {:title=>"b", :price=>200},
# {:title=>"c", :price=>50, :special=>"Low price!"}]