You ain't gonna need it. The idea is that developers tend to think, "what if they need $x too? I'll just add it." Or, worse, they over gerneralize their solutio

You ain't gonna need it. The idea is that developers tend to think, "what if they need $x too? I'll just add it." Or, worse, they over gerneralize their solution. "I needed to rank 3 cart items by price, so I developed a way to rate an unbounded iterable of any type."