Question

How to transform map values to a vector in Rust

Answer 1

use std::collections::HashMap;

fn main() {
    let mut hmp = HashMap::new();
    
    hmp.insert("Red", 30);
    hmp.insert("Green", 57);
    hmp.insert("Blue", 86);
    hmp.insert("Yellow", 102);
    
    let values: Vec<i32> = hmp.values().map(|v| v * v).collect();

    println!("{:?}", values);
}




/*
run:

[3249, 900, 7396, 10404]

*/

 

70+ SQL courses for beginners and professionals