18.8 Summary
Rust’s rich set of collection types—Vec<T>, String, HashMap<K, V>, and others—enables you to handle dynamic data safely and expressively. Each collection automatically manages its own memory under Rust’s ownership rules, avoiding common C pitfalls such as memory leaks, double frees, and out-of-bounds writes.
By understanding their trade-offs and usage patterns, you can select the right data structure for your task. Whether storing lists of homogeneous data, working with text, or mapping keys to values, Rust’s standard collections help ensure your code is robust, maintainable, and efficient—all without tedious manual memory management.