I really liked the way Sussman discussed repetition in the SICP lectures. Something like, “If you find yourself repeating the something, that’s often a hint tha

I really liked the way Sussman discussed repetition in the SICP lectures. Something like, “If you find yourself repeating the something, that’s often a hint that there could be a useful abstraction.” It’s a far less prescriptive (and more appropriately flexible) way of expressing the same general idea than DRY.