marijnh
commented
6 years ago Thanks for reaching out. But with that added closing parenthesis, there are now more closing than opening parentheses and the code causes an error when you try to run it. So no, I don't think it should be there.
The function 'average' in chapter 5 is missing a closing bracket. It should be:
function average(array) { return array.reduce((a, b) => a + b) / array.length); }