Choosing the Right Type

Selecting the right data structure is one of the most important skills in programming. The choice affects code clarity, performance, and correctness. A well-chosen data structure makes code simpler and faster. A poorly chosen one leads to complex workarounds and performance problems. The good news is that choosing becomes intuitive with practice. After working with these four structures for a while, you will instinctively know which one fits each situation. Until then, use a systematic decision framework to guide your choices. The Decision Framework Start by asking these questions about your data: Does order matter? Are duplicates allowed? Do you need to look up items by a key? Should the data be modifiable after creation? Your answers point directly to the right structure. Think about wha