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Comment by vilcxjo on Roles are Martial Arts for Agency · 2014-09-09T17:03:14.082Z · score: 4 (6 votes) · LW · GW

This is why musicians play scales and arpeggios. Nobody really cares about scales or arpeggios. But when you run into a long sequence of them in some piece you are studying, it makes the difference between sight reading it and spending a week learning it.

FWIW, I think this is also why Design Patterns in SW Engineering is important. They are roles for programs.