What are the differences between sets and arrays?

What are the differences between sets and arrays?

Sets and arrays are both data structures, but they have key differences. Arrays are ordered collections that can contain duplicates, while sets are unordered collections that do not allow duplicates.

Can you give me an example of when to use a set instead of an array?

Sure! Use a set when you need to ensure all elements are unique, like storing unique user IDs. Use an array when order matters, like a list of tasks.

What about performance? Are there any differences in how they handle data?

Yes, sets generally offer faster lookups for membership tests due to their underlying hash table implementation, while arrays may require linear time to search.

Are there any programming languages where sets and arrays behave differently?

Yes, for example, in Python, sets are built-in and have specific methods for set operations, while arrays are handled through lists. In Java, arrays are fixed-size, while sets can dynamically grow.