As feedback on the article itself, I kept getting confused. The author describes a wish: > If I write a function to sum a list of numbers, it would be nice if

As feedback on the article itself, I kept getting confused. The author describes a wish: > If I write a function to sum a list of numbers, it would be nice if I could use it on lists of floats, lists of ints, and lists of anything else that can be summed. I agree with the author and continue reading, expecting to see an implementation of that function in each language. I keep reading and re-reading to try to figure out how the first two code samples (Rust and Haskell) are summing a list. I feel like an idiot, because I can't figure out how that code is possibly summing a list. Thankfully, the next paragraph explains it, but a heads up would have made it more clear. The article continues with pairs of Rust and Haskell -- as a reader, I'm thinking, "Yes, yes, but show me how this compares to Go." Finally, when I get to `Go's Solution: interface{}` I feel like I'll be able to compare the languages... but instead of implementing an already-mentioned problem, a new problem is introduced: > Let's say you wanted to write a function that printed a hash code for objects that could be hashed. As a reader, I have too many things in my head now. I think the author probably has valid points to make, and I will now finish reading the article. Hopefully some of this feedback is helpful (I'm not trying to be a jerk).