Rust Collections

playground.rs

fn main() {
    //The vec! macro is sugar for inline Vec<T> building
    let vec1 = vec!["a", "b", "c"];
    let vec2 = vec![1, 2, 3];
 
    //Rust has iterators, which are usually cheaper than looping
    for (&x, &y) in vec1.iter().zip(vec2.iter()) {
        println!("{}, {}", x, y);
    }
    
    println!("");
    
    //You can iterate over more than just vectors
    for i in 0..10 {
      println!("{}", i);
    }
    
    println!("");
    
    //You can filter and map too (could use filter_map)
    //Those '|'s are a closure. Rust functions have their own types; Fn, FnOnce and FnMut
    for i in (0..10)
      .filter(|i| i % 2 == 0)
      .map(|i| i * 2) {
      println!("{}", i);  
    }
    
    //Other collection types include: 
    // - arrays (the size is part of the type)
    // - BTreeSet / BTreeMap for ordered collections
}