[Rust] Ownership(소유권) 기초 예제 : For Loop (35일차)

 

<For Loop Part>

[예제 코드_1]

fn main() {
    let names = vec![
        String::from("John"),
        String::from("Jane"),
    ];
    for name in names {
        println!("{}", name);
    }
}

 

[실행 결과]

John
Jane

 

---

 

[예제 코드_2]

fn main() {
    let names = vec![
        String::from("John"),
        String::from("Jane"),
    ];
  
    for name in names {
        println!("{}", name);
    }
  
    println!("Names: {:?}", names);
}

 

[실행 결과]

error[E0382]: borrow of moved value: `names`
 --> src/main.rs:11:29

 

---

 

[예제 코드_3]

fn main() {
    let names = vec![
        String::from("John"),
        String::from("Jane"),
    ];

    for name in names.into_iter() {
        println!("{}", name);
    }

    println!("Names: {:?}", names);
}

 

[실행 결과]

error[E0382]: borrow of moved value: `names`
 --> src/main.rs:11:29

 

---

 

[예제 코드_4]

fn main() {
    let names = vec![
        String::from("John"),
        String::from("Jane"),
    ];
  
    let names_iter = names.into_iter();
    for name in names_iter {
        println!("{}", name);
    }
    println!("Names: {:?}", names);
}

 

[실행 결과]

error[E0382]: borrow of moved value: `names`
 --> src/main.rs:11:29

 

---

 

[예제 코드_5]

fn main() {
    let names = vec![
        String::from("John"),
        String::from("Jane"),
    ];

    for name in names.iter() {
        println!("{}", name);
    }

    println!("Names: {:?}", names);
}

 

[실행 코드]

John
Jane
Names: ["John", "Jane"]

 

---

 

[예제 코드_6]

fn main() {
    let names = vec![
        String::from("John"),
        String::from("Jane"),
    ];

    for name in &names {
        println!("{}", name);
    }

    println!("Names: {:?}", names);
}

 

[실행 결과]

John
Jane
Names: ["John", "Jane"]

 

---

 

[예제 코드_7]

fn main() {
    let names = vec![
        String::from("John"),
        String::from("Jane"),
    ];

    println!("Names: {:?}", names);

    for name in names {
        println!("{}", name);
    }
}

 

[예제 코드]

Names: ["John", "Jane"]
John
Jane

 

---

 

[예제 코드_8]

fn main() {
    let names = vec![
        String::from("John"),
        String::from("Jane"),
    ];

    for name in names.clone() {
        println!("{}", name);
    }

    println!("Names: {:?}", names);
}

 

[실행 결과]

John
Jane
Names: ["John", "Jane"]

 

---

 

[예제 코드_9]

fn main() {
    let names = vec![
        String::from("John"),
        String::from("Jane"),
    ];
    
    names.for_each(|name|
       println!("{}", name));
    
    println!("{:?}", names);
}

 

[실행 결과]

error[E0599]: `Vec<String>` is not an iterator
 --> src/main.rs:7:11

 

---

 

[예제 코드_10]

fn main() {
    let names = vec![
        String::from("John"),
        String::from("Jane"),
    ];
    
    names
        .iter()
        .for_each(|name|
           println!("{}", name));
    
    println!("{:?}", names);
}

 

[실행 결과]

John
Jane
["John", "Jane"]

 

---

 

[예제 코드_11]

fn main() {
    let names = vec![
        String::from("John"),
        String::from("Jane"),
    ];
  
    names
        .into_iter()
        .for_each(|name|
           println!("{}", name));
  
    println!("{:?}", names); 
}

 

[실행 결과]

error[E0382]: borrow of moved value: `names`
 --> src/main.rs:12:22

 

---

 

[예제 코드_12]

fn main() {
    let names = vec![
        String::from("John"),
        String::from("Jane"),
    ];
    
    println!("{:?}", names); 

    names
        .into_iter()
        .for_each(|name|
           println!("{}", name));
}

 

[실행 결과]

["John", "Jane"]
John
Jane

 

---

 

[예제 코드_13]

fn main() {
    let names = vec![
        String::from("John"),
        String::from("Jane"),
    ];

    names.clone()
        .into_iter()
        .for_each(|name|
           println!("{}", name));
    
    println!("{:?}", names); 
}

 

[실행 결과]

John
Jane
["John", "Jane"]

 

 

 

---

 

<참조 1> https://itnext.io/rust-ownership-50-code-examples-96203fcf79ea