�� �� via FaceBook via twitter I hear you've coined BlockClosure>>#memoized.�� Allow me to beg you to rename it to BlockClosure>>#once.�� There's a preexisting implementation of this in VisualWorks by Travis Griggs called once.�� I hope you agree that it's good to eliminate gratuitous incompatibilities between dialects and that "once" is an elegant name.