ruby cache

cache.rb

# not exactly a pure cache, implements the lookup or expensive operation too
# probably needs to be decoupled

class Cache
  def initialize
    @cache = {}
  end

  def cache(name, values = {})
    if values = {}
      return @cache[name.to_sym]
    else
      @cache[name.to_sym] ||= values
    end
  end

  def search(name)
    if @cache.keys.include?(name.to_sym)
      puts "getting name from cache instead of expensive operation"
      return @cache[name.to_sym]
    else
      self.cache(name, Expensive::Search(name))
      return @cache[name.to_sym]
    end
  end

  def clear
    cache_size = @cache.length
    @cache = {}
    return cache_size
  end

  def to_s
    "#<Cache:#{self.object_id} Cache Size: #{@cache.length}>"
  end

  def size
    @cache.length
  end

end