Which of the following best describes the concept of "structural sharing" in immutable data structures?
- Sharing the same data between objects.
- Sharing the same metadata between objects.
- Sharing the same methods between objects.
- Sharing the same structure between objects.
"Structural sharing" in immutable data structures refers to sharing the same structure between objects. When you make a change to an immutable data structure, like adding a new element to a list, the new structure shares as much of the original structure as possible, reducing memory usage and improving efficiency. This is a key optimization technique in functional programming and immutable data management.
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