Rust examples that are familiar to Object Pascal programmers

Rust_familiar.rs

// Source: Hands-on Rust. 
​use​ ​std​::​io​::stdin;

fn​ ​main​() {
      let​ MYLIST = [ ​"One"​, ​"Two"​, ​"Three"​ ];
​    ​for​ i in 0..3 {
​ 	        println!(​"{}"​, MYLIST[i]);
​ 	    }
}


fn​ ​main1​() {
      let​ my_list = [ ​"One"​, ​"Two"​, ​"Three"​ ];
​     for​ num in &my_list {
​ 	        println!(​"{}"​, num);
​ 	   }
}

​
​fn​ ​main2​() {
​    println!(​"Hello, what's your name?"​);

​    let​ ​mut​ your_name = ​String​::​new​();
​    stdin​()
​        ​.read_line​(&​mut​ your_name)
​        ​.expect​(​"Failed to read line"​);

​    your_name
​        ​.trim​()
​        ​.to_lowercase​()

​    println!(​"Hello, {}"​, your_name)
​}


​struct​ Visitor {
​    name: String,
​    greeting: String,
​}

impl​ Visitor {    
    ​fn​ ​new​(name: &str, greeting: &str) ​->​ Self {    
        Self {  
            name: name​.to_lowercase​(),
            greeting: greeting​.to_string​(),
        }
     }
}

fn​ ​greet_visitor​(&​self​) { 
​        println!(​"{}"​, ​self​.greeting);
​    }
​}


let​ visitor_list = [
    ​   Visitor​::​new​(​"bert"​ , ​"Hello Bert, enjoy your treehouse."​),
    ​   Visitor​::​new​(​"steve"​, ​"Hi Steve. Your milk is in the fridge."​),
    ​   Visitor​::​new​(​"fred"​ , ​"Wow, who invited Fred?"​),
    ];

let​ known_visitor = visitor_list
​​              	    ​.iter​()
​​              	    ​.find​(|visitor| visitor.name == name);


fn​ ​check_visitor_name​(visitor: &Visitor, name: &String) ​->​ bool {
​    ​return​ visitor.name == name;
​}


​match​ known_visitor {
​​​       ​Some​(visitor) ​=>​ visitor​.greet_visitor​(),
​​​       None ​         =>​ println!(​"You are not on the visitor list. Please leave."​)
}


​let​ ​mut​ visitor_list2 = vec! [
​    ​   Visitor​::​new​(​"Bert"​, ​"Hello Bert, enjoy your treehouse."​),
​    ​   Visitor​::​new​(​"Steve"​, ​"Hi Steve. Your milk is in the fridge."​),
​    ​   Visitor​::​new​(​"Fred"​, ​"Wow, who invited Fred?"​),
​    ];

​match​ known_visitor {
​    Some​(visitor) ​=>​ visitor​.greet_visitor​(),
​    None          ​=>​ {
				​​​        ​if​ name​.is_empty​() {    
				​​​            ​break​;  
				​        } ​else​ {
				​            println!(​"{} is not on the visitor list."​, name);
							visitor_list2​.push​(​Visitor​::​new​(&name, ​"New friend"​));
				​        }
				​     }
​}