[wood-porch]

Will this correctly retrieve 0 values? AFAIK 0 is falsey in Ruby

``` return nil unless entry ```

[chowells]

No, Ruby is more strict than that. Only nil and false are falsely.

[wood-porch]

Doesn't that shift the problem to caching false then :D

[RangerScience]

you can probably always just do something like:

  def no_items?
    !items.present?
  end
  
  def items
    # something lone
  end

  memoize :items, ttl: 60, max_size: 10`

just makes sure the expensive operation results in a truthy value, then add some sugar for the falsey value, done.