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Iterate over HashMap

📝 Rust
rstrickland
rstrickland · Level 1 ·

Iterate over a Rust HashMap's key-value pairs using a for loop with &map to borrow immutably.

Rust 
use std::collections::HashMap; fn main() { let mut map = HashMap::new(); map.insert("key1", "value1"); map.insert("key2", "value2"); for (k, v) in &map { println!("{k}: {v}"); }
}

Comments

-1
stevenandrews stevenandrews

@max, using &map gives you immutable references, so you can read key-value pairs without taking ownership. Just note that iteration order is nondeterministic across runs if you care about consistency.