Option to Result

In the previous challenge we converted a Result<T, E> to an Option<T> by using the .ok() method, Rust provides us other mechanisms to convert an Option<T> to a Result<T, E> as well. In this challenge, you will learn how to use the .ok_or() method to convert an Option<T> to a Result<T, E>.

Your Task

Implement the function get_first_element:

Takes two parameters:
- A vector of integers (Vec<i32>).
- A minimum allowed value (i32).
Use the .first() method to retrieve the first element of the vector, this returns Option<&T>.
If the value is None, convert it to a Result<T, E> using the .ok_or() method with the error message "Vector is empty".
Then run a validation check to ensure the first element is greater than or equal to the minimum allowed value provided. If not, return an error with message "First element is below the minimum allowed value".
If everything is ok, return a Ok(T) with the first element.

Hints

If you're stuck, here are some hints to help you solve the challenge:

Click here to reveal hints

You can use the .ok_or() method and propagate the error cleanly. e.g.

let first_element = numbers.first().ok_or("Vector is empty".to_string())?;

Editor not available on Mobile!

In order to solve the challenge, please visit this page on a desktop computer.

Solutions

Pranav Garg

PranavGarg01

a day ago

4.90ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string());
    match first_element {
        Ok(value) => {
            if(*value < min_value) {
                return Err("First element is below the minimum allowed value".to_string());
            }
            else {
                return Ok(*value)
            }
        },
        Err(l) => return Err(l)
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Sandeep chauhan

ryzen-xp

2 days ago

3.96ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first(); // <- Returns an Option<&i32>
    match first_element {
        Some( num ) => {
            if *num >= min_value {
                Ok(*num)
            }
            else {
                Err(String::from("First element is below the minimum allowed value"))
            }
        },
        None => Err(String::from("Vector is empty")) 
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

amaneru

7ma8no9

2 days ago

3.67ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty")?; // <- Returns an Option<&i32>
    if *first_element < min_value {
        return Err("First element is below the minimum allowed value".to_string());
    }
    Ok(first_element.clone())
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

AKA.MoneyTaker

M4Bo2

5 days ago

3.74ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function Takes two parameters:
// A vector of integers (Vec<i32>).
// A minimum allowed value (i32).
// Use the .first() method to retrieve the first element of the vector, this returns Option<&T>.
// If the value is None, convert it to a Result<T, E> using the .ok_or() method with the error message "Vector is empty".
// Then run a validation check to ensure the first element is greater than or equal to the minimum allowed value provided. If not, return an error with message "First element is below the minimum allowed value".
// If everything is ok, return a Ok(T) with the first element.?
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?; // <- Returns an Option<&i32>
    if *first_element <min_value{
        return Err("First element is below the minimum allowed value".to_string());
    }
    Ok(*first_element)
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Prafful

iamsahu

5 days ago

4.01ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string()); // <- Returns an Option<&i32>
    match first_element {
        Ok(value) => {
            if *value >= min_value {
                return Ok(*value)
            } else {
                Err("First element is below the minimum allowed value".to_string())
            }
        },
        Err(e) => Err(e)
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Anıl Şenay

anilsenay

6 days ago

3.55ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first(); // <- Returns an Option<&i32>
    let resut = first_element.ok_or("Vector is empty".to_string());
    match resut {
        Ok(value) => {
            if value >= &min_value {
                Ok(*value)
            } else {
                Err("First element is below the minimum allowed value".to_string())
            }
        }
        Err(e) => Err(e),
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Dyaa Adel

dyaa-adel

7 days ago

4.03ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().copied().ok_or("Vector is empty")?; // <- Returns an Option<&i32>
    if first_element < min_value {
        Err("First element is below the minimum allowed value".to_string())
    } else {
        Ok(first_element)
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Yi Hao

leongyihao

8 days ago

3.38ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?;
	match *first_element < min_value {
		true => Err("First element is below the minimum allowed value".to_string()),
		false => Ok(*first_element)
	}
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

TiagONTOP

8 days ago

4.37ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?;
    if *first_element < min_value {
        return Err("First element is below the minimum allowed value".to_string());
    }
    Ok(*first_element)// <- Returns an Option<&i32>
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Lê Minh Quân

aleister1102

8 days ago

3.44ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty")?; // <- Returns an Option<&i32>
    if *first_element < min_value {
        return Err("First element is below the minimum allowed value".to_string());
    }
    Ok(*first_element)
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Guilherme Cesário Strachan

strachan

9 days ago

4.61ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty")?; // <- Returns an Option<&i32>
    if first_element < &min_value {
        return Err("First element is below the minimum allowed value".to_string());
    }
    Ok(*first_element)
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

norabbito

10 days ago

4.05ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    // let first_element = numbers.first(); // <- Returns an Option<&i32>
    let first_element = *numbers.first().ok_or("Vector is empty")?;
    if first_element < min_value {
        return Err("First element is below the minimum allowed value".to_string());
    }
    Ok(first_element)
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

tzmijewski

10 days ago

3.58ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first(); // <- Returns an Option<&i32>
    match first_element.ok_or(0){
        Ok(i32) => {
            if *first_element.unwrap() >= min_value {
                Ok(*first_element.unwrap())
        } else {
            Err("First element is below the minimum allowed value".to_string())
        }},
        Err(e) => Err("Vector is empty".to_string())
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Ayushman Rathore

Spartan09

10 days ago

3.08ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    let first_element = *numbers.first().ok_or("Vector is empty".to_string())?;
    if first_element < min_value {
        return Err("First element is below the minimum allowed value".into());
    }
    Ok(first_element)
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Jordan

Jordan-Haidee

12 days ago

4.68ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first(); // <- Returns an Option<&i32>
    let x = first_element.ok_or("Vector is empty".to_owned())?;
    if *x >= min_value {
        return Ok(*x);
    } else {
        Err("First element is below the minimum allowed value".to_owned())
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Diego Maia

diegocmsantos

13 days ago

5.35ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or(0); // <- Returns an Option<&i32>
    match first_element {
        Ok(a) if *a >= min_value => Ok(*a),
        Ok(_) => Err("First element is below the minimum allowed value".to_string()),
        Err(_) => Err("Vector is empty".to_string()),
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

manuelmj

13 days ago

4.00ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or(String::from("Vector is empty"))?; // <- Returns an Option<&i32>
    
    match *first_element {
        element if element < min_value => Err(String::from("First element is below the minimum allowed value")),
        element => Ok(element),        
    }
    // Ok(first_element.clone())
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Kyle Diaz

kylediaz

14 days ago

4.66ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first = numbers.first().ok_or("Vector is empty".to_string())?;
    if *first >= min_value {
        return Ok(*first);
    } else {
        return Err("First element is below the minimum allowed value".to_string());
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Suraj Vijayan

its-me-sv

14 days ago

3.87ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().copied().ok_or("Vector is empty")?; // <- Returns an Option<&i32>
    (first_element >= min_value)
        .then_some(first_element)
        .ok_or("First element is below the minimum allowed value".into())
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Kenneth Love

kennethlove

16 days ago

3.42ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?; // <- Returns an Option<&i32>
    if *first_element >= min_value {
        Ok(*first_element)
    } else {
        Err("First element is below the minimum allowed value".to_string())
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Kenneth Love

kennethlove

16 days ago

6.18ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first(); // <- Returns an Option<&i32>
    match first_element.ok_or("Vector is empty") {
        Ok(num) => {
            if *num >= min_value {
                Ok(*num)
            } else {
                Err("First element is below the minimum allowed value".to_string())
            }
        },
        Err(e) => Err(e.to_string())
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Jun Huang

leemars

16 days ago

5.87ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?; // <- Returns an Option<&i32>
    if *first_element >= min_value {
        Ok(*first_element)
    } else {
        Err("First element is below the minimum allowed value".to_string())
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Muhammad-Dennis

16 days ago

3.26ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?; // <- Returns an Option<&i32>
    if *first_element < min_value {
        return Err("First element is below the minimum allowed value".to_string())
    } 
    Ok(*first_element)
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

ludovicknecht

17 days ago

4.01ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    let &first_element = numbers.first().ok_or("Vector is empty")?;
    match first_element >= min_value {
        true => Ok(first_element),
        false => Err("First element is below the minimum allowed value".into()),
    }
}

Romain Grimau

Herrgrim0

18 days ago

3.17ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?; // <- Returns an Option<&i32>
    if *first_element < min_value {
        return Err("First element is below the minimum allowed value".to_string());
    }
    Ok(*first_element)
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Viktor Merkurev

fennr

18 days ago

4.56ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first()
        .map(|&num| num)
        .ok_or("Vector is empty".to_string())?; // <- Returns an Option<&i32>
    if first_element < min_value {
        Err("First element is below the minimum allowed value".to_string())
    } else {
        Ok(first_element)
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Kentaro Abe

abekem

19 days ago

5.67ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?;
    if *first_element < min_value {
        return Err("First element is below the minimum allowed value".to_string());
    }
    Ok(*first_element)
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

alemack17

19 days ago

3.69ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty")?; // <- Returns an Option<&i32>
    let n =*first_element;
    if n>=min_value{
        return Ok(n);
    }else{
        return Err("First element is below the minimum allowed value".to_string());
    }
    
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Suresh Prajapati

toddlers

19 days ago

3.29ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?;
    if *first_element >= min_value{
        Ok(*first_element)
    } else {
        Err("First element is below the minimum allowed value".to_string())
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Whisper_icoma

1378046967

19 days ago

3.23ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?;
    if *first_element < min_value {
        Err("First element is below the minimum allowed value".to_string())
    } else {
        Ok(*first_element)
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

RiyadDz22

19 days ago

4.24ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?;
    if *first_element < min_value {
        Err("First element is below the minimum allowed value".to_string())
    } else {
        Ok(*first_element)
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

kosay

sarub0b0

20 days ago

3.46ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    let first_element = numbers.first().ok_or("Vector is empty")?;
    if min_value <= *first_element {
        Ok(*first_element)
    } else {
        Err("First element is below the minimum allowed value".to_string())
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

automata-studio

20 days ago

3.72ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?;
    if *first_element >= min_value {
        Ok(*first_element)
    }
    else {
        Err("First element is below the minimum allowed value".into())
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Denis SOURON

Brack0

20 days ago

3.25ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?;
    if *first_element < min_value {
        Err("First element is below the minimum allowed value".to_string())
    } else {
        Ok(*first_element)
    }
}

TeDeMos

21 days ago

5.97ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    match numbers.first() {
        Some(&n) if n >= min_value => Ok(n),
        Some(_) => Err("First element is below the minimum allowed value".into()),
        None => Err("Vector is empty".into()),
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

iamforgettable

21 days ago

3.61ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or(String::from("Vector is empty"))?;
    if *first_element < min_value {
        Err(String::from("First element is below the minimum allowed value"))
    } else {
        Ok(*first_element)
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Nikita Smirnov

Nismirno

22 days ago

3.73ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?;
    if *first_element < min_value {
        Err("First element is below the minimum allowed value".to_string())
    } else {
        Ok(*first_element)
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

rawar089

22 days ago

11.25ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?; // <- Returns an Option<&i32>
    if *first_element >= min_value {
        Ok(*first_element)
    } else {
        Err("First element is below the minimum allowed value".to_string())
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

rawar089

22 days ago

7.29ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?; // <- Returns an Option<&i32>
    if *first_element >= min_value {
        Ok(*first_element)
    } else {
        Err("First element is below the minimum allowed value".to_string())
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Algorab

22 days ago

3.81ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?; // <- Returns an Option<&i32>
    if first_element >= &min_value {
        Ok(*first_element)
    } else {
        Err("First element is below the minimum allowed value".to_string())
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Elliott Draper

ejdraper

23 days ago

5.58ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty")?; // <- Returns an Option<&i32>
    if first_element >= &min_value {
        return Ok(*first_element);
    } else {
        return Err("First element is below the minimum allowed value".to_string());
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Marco-Normal

23 days ago

4.06ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = match numbers.first().ok_or("Vector is empty".to_string()) {
        Ok(el) => el,
        Err(e) => return Err(e),
    };
    if *first_element >= min_value {
        return Ok(*first_element);
    } else {
        return Err("First element is below the minimum allowed value".to_string());
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Simon Noetzlin

sainoe

23 days ago

3.30ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    let first_element = numbers.first().ok_or("Vector is empty")?; 
    if *first_element < min_value {
        return Err("First element is below the minimum allowed value".to_string())
    }
    Ok(*first_element)  
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Jim Lawton

jimlawton

24 days ago

4.96ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?;
    if *first_element >= min_value {
        Ok(*first_element)
    } else {
        Err("First element is below the minimum allowed value".to_string())
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Stefan Roas

sroas

24 days ago

3.23ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?; // <- Returns an Option<&i32>
    match *first_element >= min_value {
        true => Ok(*first_element),
        false => Err("First element is below the minimum allowed value".to_string()),
    }
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Oebelus

oebelus

25 days ago

3.49ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    let first_element = numbers.first().ok_or("Vector is empty")?;
    if *first_element < min_value {
        return Err("First element is below the minimum allowed value".to_string());
    }
    Ok(*first_element)
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

rado31

25 days ago

3.50ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?;
    if *first_element >= min_value {
        return Ok(*first_element);
    }
    Err("First element is below the minimum allowed value".to_string())
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

delxs

a month ago

3.47ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?; // <- Returns an Option<&i32>
    if *first_element < min_value {
        return Err("First element is below the minimum allowed value".to_string());
    }
    Ok(*first_element)
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Jonathan Voss

jvoss

a month ago

4.60ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    // let first_element = numbers.first(); // <- Returns an Option<&i32>
    let first_element = numbers.first().ok_or("Vector is empty")?;
    if *first_element < min_value {
        return Err("First element is below the minimum allowed value".to_string())
    }
    Ok(*first_element)
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}

Shafer Hess

shafer-hess

a month ago

5.05ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first: &i32 = numbers.first().ok_or("Vector is empty")?;
    if *first < min_value {
        return Err("First element is below the minimum allowed value".to_string());
    }
    Ok(*first)
}
// Example usage
pub fn main() {
    let numbers = vec![10, 20, 30, 40, 50];
    match get_first_element(numbers.clone(), 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
    let empty_numbers: Vec<i32> = vec![];
    match get_first_element(empty_numbers, 15) {
        Ok(value) => println!("First valid value: {}", value),
        Err(e) => println!("Error: {}", e),
    }
}