So, data structures are important—but like most aspects of programming they are hard to get right. I do make an initial analysis to figure out the best data structures, and I’ve found that experience and techniques like domain-driven design have improved my ability to do that. But despite all my skill and experience, I still find that I frequently make mistakes in that initial design. In the process of programming, I learn more about the problem domain and my data structures. A design decision that is reasonable and correct one week can become wrong in another.
