rustHow to create a Rust HashMap from a vec?

Creating a Rust HashMap from a vec is a simple process. The following example code creates a HashMap from a vec of tuples:

let mut map = HashMap::new();
let vec = vec![("key1", "value1"), ("key2", "value2")];

for (key, value) in vec {
    map.insert(key, value);
}

The output of the example code is a HashMap with two entries:

{"key1": "value1", "key2": "value2"}

Code explanation

1. let mut map = HashMap::new(); - creates a new, empty HashMap.
2. let vec = vec![("key1", "value1"), ("key2", "value2")]; - creates a vec of tuples.
3. for (key, value) in vec { - iterates over the vec of tuples.
4. map.insert(key, value); - inserts each tuple into the HashMap.

Helpful links

• Rust HashMap Documentation
• Rust Vec Documentation

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