rustHow to clear a Rust HashMap?

To clear a Rust HashMap, use the clear() method. This method will remove all elements from the HashMap.

Example

use std::collections::HashMap;

let mut map = HashMap::new();
map.insert("a", 1);
map.insert("b", 2);

map.clear();

assert!(map.is_empty());

Output example

The clear() method takes no arguments and returns nothing. It simply removes all elements from the HashMap.

Helpful links

• Rust Documentation - HashMap

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