I know just enough to say that APL & J are much more expressive as long as Python doesn't have a fix_problem() method built-in.
This is pretty much the same impression I got, though I came from the other direction. I was kind of surprised how many StackOverflow posts ask about adapting a fix_problem() method to fix some very_similar_problem.
Yep. It's one reason why I prefer to write my own code where possible instead of using 3rd party libraries. When you need to change something, it is nice to not read tons of other code.
