New Features in R6DS 1.2.0

• The efficiency of the classes has been improved.
• Bugs fixed.

New Features in R6DS 1.1.1

• Bugs fixed.
• A new vignette was added into the package.
• Every class has the new common method toList.
• Every class has the new common method is_empty.
• The insert function of the RBST class can take more arguments.
• RStack has peek and RQueue has peekleft.

New Features in R6DS 1.1.0

• All the functions
• Documentation including README, LICENSE and etc.