> To me it's a way of retaining some programming knowledge - but to retain something you need to understand it beforehand A critical factor here, though, is th

> To me it's a way of retaining some programming knowledge - but to retain something you need to understand it beforehand A critical factor here, though, is that it's very clear from the spaced repetition/testing literature that the way you learn beforehand affects retention. (e.g. Karpicke and Roediger 2008).