<p><em>GK (0:03:23)</em>: I really remember like the first exercise was that we had to define a tree data structure. And by then, I knew Modula-2, I knew a little of assembly, and I had no idea how to do that in Pascal. And then I was really frustrated. I asked a friend, and he showed me basically this one line, and I thought, yeah, well, that’s basically what I need to do, but that’s not an implementation because I was thinking about what you had to do, what has to happen in memory to define a tree. And I think that was a really wake up, that it’s possible to program without describing in detail what has to happen at the machine level. I mean, that was really well before Haskell yet. </p>
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