programming in the twenty-first centuryIt's not about technology for its own sake. It's about being able to implement your ideas. The IO List is a handy data type in Erlang, but not one that's often discussed in tutorials. It's any binary. Or any list containing integers between 0 and 255. Or any arbitrarily nested list containing either of those two things. Like this: [10, 20, "hello", <<"hello",