Iterate Over A BTreeMap In Rust Modifying The Items

December 2024

use std::collections::BTreeMap;

fn main() {
  let mut items: BTreeMap<String, String> = BTreeMap::new();
  items.insert("alfa".to_string(), "one".to_string());
  items.insert("bravo".to_string(), "two".to_string());
  items.iter_mut().for_each(|k| {
    if k.0 == "bravo" {
      *k.1 = "CHANGED".to_string();
    }
  });
  dbg!(items);
}

Output:

[_active_nvim_run:13:3] items = {
    "alfa": "one",
    "bravo": "CHANGED",
}

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