Articulating the ineffable. Programming language theory 
cognitive psychology. PhD @Stanford
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That's cool! Didn't know about DOTS. I skimmed a few DOTS tutorials but didn't see anything addressing my main gripe: code modularity.
Eg a helper function that computes what entity the player is looking at. It depends on global resources (physics engine, ray caster), but I don't want to make it a separate system. To call `player.looked_entity()` I have to pass through all its dependencies -- leaky abstraction.
