Nah, that's the one that's popular ("pleasant") to recognize. If I had to hazard a guess, I'd imagine Dijkstra would have a word or two to say about callbacks,

Nah, that's the one that's popular ("pleasant") to recognize. If I had to hazard a guess, I'd imagine Dijkstra would have a word or two to say about callbacks, given his famously strong beliefs about GOTOs....