rustHow to declare a constant HashSet in Rust?

A constant HashSet in Rust can be declared using the const keyword.

const MY_HASH_SET: HashSet<i32> = [1, 2, 3].iter().cloned().collect();

This code creates a constant HashSet called MY_HASH_SET containing the elements 1, 2, and 3. The iter() method creates an iterator over the array, cloned() creates a clone of each element, and collect() collects the elements into a HashSet.

• const: keyword used to declare a constant
• MY_HASH_SET: name of the constant
• HashSet<i32>: type of the constant
• [1, 2, 3]: array of elements to be added to the HashSet
• iter(): creates an iterator over the array
• cloned(): creates a clone of each element
• collect(): collects the elements into a HashSet

Helpful links

• Rust Documentation - Constants
• Rust Documentation - HashSet

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