Imaginary Numbers

Using the Rules to Bend the Rules

How We Added Time Travel to Paperless Post

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We recently completed a major feature at Paperless Post: a full undo/redo system. The post covers the Command pattern, and how easy it is to implement in both JavaScript and ActionScript… and how hard it is to apply that implementation to a large living application. I’ll be posting some specific war stories in the future, but for now, click through and enjoy.