You need to design a system to efficiently find whether a value is present in a collection of millions of items. Which data structure in Go would you use and why?
- Array
- Hash Table (using a map)
- Map
- Slice
To efficiently find whether a value is present in a large collection of millions of items, you would use a Hash Table implemented using a map. Hash Tables provide constant-time (O(1)) average case lookup, which makes them highly efficient for this purpose. The hash function helps distribute items evenly across buckets, ensuring that searching for a specific value remains fast even with a large dataset. This is an optimal choice when speed and efficiency are critical.
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