There are a handful of concepts every Go beginner wrestles with. Pointers. Interfaces. Goroutines. And somewhere near the top of that list sits a deceptively simple pair: Arrays and slices. When I first started learning Go, I honestly thought they were the same thing. Both stored multiple values. Both used square brackets. Both let me access elements by index. So naturally, I asked myself: Why does Go have two data structures that seem to do exactly the sa...