How do I create a HashMap literal?

Question

How I can create a HashMap literal in Rust? In Python I can do it so:

hashmap = {
   \'element0\': {
       \'name\': \'My New Element\',
       \'childs\':          


        

Answer 1

As noted by @Johannes in the comments, it's possible to use vec![] because:

• Vec implements the IntoIterator trait
• HashMap implements FromIterator

which means you can do this:

let map: HashMap = vec![("key".to_string(), "value".to_string())]
    .into_iter()
    .collect();

You can use &str but you might need to annotate lifetimes if it's not 'static:

let map: HashMap<&str, usize> = vec![("one", 1), ("two", 2)].into_iter().collect();