Weak references for Ruby

Add to your Gemfile and bundle

gem "wref"

str = "Test"
weak_ref = Wref.new(str)

weak_ref.alive? #=> true | false

weak_map = Wref::Map.new

str = "Test"
map[1] = str
map.set(1, str)

map.get(1) #=> "Test" | nil
map.get!(1) #=> "Test" | Wref::Recycled error

map.each do |key, value|
  puts "Valid pair: #{key}: #{value}"
end

map.valid?(1) #=> true | false

map.length #=> 1

map.length_valid #=> 0

map.get(1) #=> "Test" | nil
map.get!(1) #=> "Test" | Error - Wref::Recycled

map.delete(1) #=> "Test" | nil if recycled

map.clean

• Check out the latest master to make sure the feature hasn't been implemented or the bug hasn't been fixed yet.
• Check out the issue tracker to make sure someone already hasn't requested it and/or contributed it.
• Fork the project.
• Start a feature/bugfix branch.
• Commit and push until you are happy with your contribution.
• Make sure to add tests for it. This is important so I don't break it in a future version unintentionally.
• Please try not to mess with the Rakefile, version, or history. If you want to have your own version, or is otherwise necessary, that is fine, but please isolate to its own commit so I can cherry-pick around it.

Copyright (c) 2012 Kasper Johansen. See LICENSE.txt for further details.