use std::collections::HashMap; fn main() { let mut state_codes: HashMap<&str, &str> = HashMap::new(); state_codes.insert("NV", "Nevada"); state_codes.insert("NY", "New York"); }

https://www.koderhq.com/tutorial/rust/hashmap/

nesed hasmap let mut cat: HashMap<String, HashMap<String,String>> = HashMap::new(); let mut subcat: HashMap<String,String> = HashMap::new(); subcat.insert("Hello".to_string(), "Rust!".to_string()); cat.insert("Hello".to_string(), subcat); 17.03.21

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