That’s the challenge.Sit down with someone you’ve never met and try to work out if they are a coder or a clown.I don’t mean to insult anyone, of course, and I’m the first to acknowledge the years of training and effort that goes into being a professional clown.But some coders, oh boy.Like the time I interviewed a recent graduate. I’ll call her Ada. Full of sympathy for the novice programmer I started with a gentle warm-up, a soft-ball question to break the ice.I asked Ada to write some code, on paper, that would print the word “hello” ten times. A...