Actually, I think an interesting exercise for evaluating a language could be determining "how much code change do small semantic changes require". For instance,

Actually, I think an interesting exercise for evaluating a language could be determining "how much code change do small semantic changes require". For instance, if we were to start with passing a generator (in the "generates a value" sense of the word, not the other one), and try to convert it to passing a counter, how would that look? JS: foo(x => () => x) bar(x => () => x++) Py: foo(lambda x: lambda: x) def countUpFromN(n): def add(): nonlocal n n += 1 return n-1 return add bar(countUpFromN) Fairly damning to python IMO. I'd be interested to see examples of where small changes in Python require large changes in JS.