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())?;

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Solutions

Neel Knight

NeelKnight

3 days ago

5.94ms

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),
    }
}

Kanak Shilledar

kanakshilledar

4 days ago

5.77ms

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 {
        Err(message) => Err(message),
        Ok(number) => {
            if number < &min_value {
                Err("First element is below the minimum allowed value".to_string())
            } else {
                Ok(*number)
            }
        }
    }
}
// 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),
    }
}

Seth Wood

seth-wood

6 days ago

3.54ms

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(n) => {
            if n < &min_value {
                Err("First element is below the minimum allowed value".to_string())
            } else {
                Ok(*n)
            }
        }
        Err(m) => Err(m),
    }
}
// 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),
    }
}

Kanak Shilledar

kanakshilledar

7 days ago

4.94ms

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 {
        Err(message) => Err(message),
        Ok(number) => {
            if number < &min_value {
                Err("First element is below the minimum allowed value".to_string())
            } else {
                Ok(*number)
            }
        }
    }
}
// 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),
    }
}

zazapalm3012

7 days ago

3.97ms

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 {
        Err(message) => Err(message),
        Ok(number) => {
            if number < &min_value{
                Err("First element is below the minimum allowed value".to_string())
            }
            else{
                Ok(*number)
            }
        }
    }
}
// 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),
    }
}

Nicolai

Posmac

8 days ago

4.80ms

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(String::from("First element is below the minimum allowed value"));
    }
    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),
    }
}

Felix Kiprotich

penscola

11 days ago

4.24ms

87.38kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
        numbers
        .first()
        .ok_or("Vector is empty".to_string())
        .and_then(|&num|
            if num>=min_value {
                Ok(num)
            }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),
    }
}

Health-Care-Movie

12 days ago

6.00ms

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("Vector is empty".to_string()).copied()?;
    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),
    }
}

Elizabeth Doughty

Thymelizabeth

12 days ago

5.10ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    match numbers.first().copied() {
        Some(n) if n >= min_value => Ok(n),
        Some(_) => Err("First element is below the minimum allowed value".to_string()),
        None => 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),
    }
}

Splatrac

splatrac

13 days ago

3.97ms

87.38kb

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>
    let result = first_element.copied().and_then(|num| {
        if num >= min_value {
            Ok(num)
        } else {
            Err("First element is below the minimum allowed value".to_string())
        }
    });
    result
}
// 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),
    }
}

Trịnh Chấn Duy

Duyyy123

15 days ago

3.77ms

87.38kb

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>
    first_element
        .ok_or("Vector is empty".to_string())
        .and_then(|&value| {
            if value < min_value {
                Err("First element is below the minimum allowed value".to_string())
            } else {
                Ok(value)
            }
        })
}
// 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),
    }
}

Liyqq

16 days ago

4.36ms

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())?.clone();
    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),
    }
}

agamaontherock

17 days ago

3.81ms

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 {
        None => {
            return first_element.ok_or("Vector is empty".to_string()).copied();
        },
        Some(&val) => {
            if val < min_value {
                return Err("First element is below the minimum allowed value".to_string());
            } else {
                return Ok(val);
            }
        }
    }
}
// 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),
    }
}

Maintain

duonghb53

20 days ago

3.32ms

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 {
        Err(msg) => Err(msg),
        Ok(number) => {
            if *number >= min_value {
                return Ok(*number);
            } 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),
    }
}

Nathan GAUD

Natchica

a month ago

4.10ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    let first_element = numbers.first();
    match first_element {
        Some(num) => if *num >= min_value {
            Ok(*num)
        } else {
            Err("First element is below the minimum allowed value".to_string())
        }
        None => first_element.ok_or("Vector is empty".to_string()).copied()
    }
}
// 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),
    }
}

Nguyen Vo Hoang Son

sonmessia

a month ago

4.10ms

87.38kb

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 result = first_element.ok_or("Vector is empty".to_string()).copied()?;
    if first_element.ok_or("Vector is empty".to_string()).copied()? < min_value {
        return Err("First element is below the minimum allowed value".to_string());
    }
    Ok(result)
}
// 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),
    }
}

Paolo Cancedda

Pac72

a month ago

3.32ms

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),
    }
}

mishbah

a month ago

4.04ms

87.41kb

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

mishbah

a month ago

3.71ms

87.38kb

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

asdfman

a month ago

4.26ms

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),
    }
}

Nhat Vu

NhatTinyVu

a month ago

3.43ms

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),
    }
}

Jakub Wiśniewski

wisniewskij

a month ago

3.94ms

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 {
        Err("First element is below the minimum allowed value".to_string())
    } else {
        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),
    }
}

roboquaternion

a month ago

3.77ms

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(String::from("First element is below the minimum allowed value"))
    }
    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),
    }
}

Jason

Jason-fy-wang

a month ago

3.15ms

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 val = first_element.ok_or(String::from("Vector is empty"));
    let v = val?;
    if *v < min_value {
        return Err(String::from("First element is below the minimum allowed value"));
    }
    Ok(*v)
}
// 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),
    }
}

Jason

Jason-fy-wang

a month ago

3.49ms

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 first_element = numbers.first(); // <- Returns an Option<&i32>
    let val = first_element.ok_or(String::from("Vector is empty"));
    let v = val?;
    if *v < min_value {
        return Err(String::from("First element is below the minimum allowed value"));
    }
    Ok(*v)
}
// 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),
    }
}

shibu-t

a month ago

3.92ms

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")?; // <- Converts Option to Result
    if *first_element < min_value {
        return Err("First element is below the minimum allowed value".to_string());
    }
    Ok(*first_element) // <- Returns Ok with the 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),
    }
}

shibu-t

a month ago

4.51ms

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")?; // <- Converts Option to Result
    if *first_element < min_value {
        return Err("First element is below the minimum allowed value".to_string());
    }
    Ok(*first_element) // <- Returns Ok with the 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),
    }
}

vijayabhaskar badireddi

ptcte

a month ago

3.57ms

87.38kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    numbers.first().ok_or("Vector is empty".to_string()).and_then(|&num| if num >= min_value { Ok(num)} else {Err("First element is below the minimum allowed value".to_string())}) // <- 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),
    }
}

ON-MX

a month ago

3.76ms

87.38kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
        numbers
        .first()
        .ok_or("Vector is empty".to_string())
        .and_then(|&num|
            if num>=min_value {
                Ok(num)
            }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),
    }
}

ON-MX

a month ago

3.80ms

87.38kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
        numbers
        .first()
        .ok_or("Vector is empty".to_string())
        .and_then(|&num|
            if num>=min_value {
                Ok(num)
            }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),
    }
}

Levio-z

a month ago

3.27ms

87.38kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
        numbers
        .first()
        .ok_or("Vector is empty".to_string())
        .and_then(|&num|
            if num>=min_value {
                Ok(num)
            }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),
    }
}

Levio-z

a month ago

4.57ms

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())?;   
    Some(first_element).filter(|&&element|element>=min_value).copied().ok_or("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),
    }
}

Assylbek Razakhbergenov

asylbek27

a month ago

6.17ms

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_owned());
    let value = *first_element?;
    if value < min_value {
        Err("First element is below the minimum allowed value".to_owned())
    } else {
        Ok(value)
    }
}
// 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),
    }
}

hosa200

a month ago

4.76ms

87.38kb

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())
       .and_then(|&num| {
        if num < min_value {
            Err("First element is below the minimum allowed value".to_string())
        }
        else {
            Ok(num)
        }
    });
    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),
    }
}

Kondorok

a month ago

5.71ms

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");
    if *first_element? < min_value {
        return Err("First element is below the minimum allowed value".to_owned());
    } // <- Returns an Option<&i32>
    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),
    }
}

rolan

rolan36

2 months ago

4.16ms

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 {
        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),
    }
}

Jason

chenjie1219

2 months ago

3.39ms

87.38kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    numbers
        .first()
        .ok_or("Vector is empty".to_string())
        .and_then(|&num| {
            if num < min_value {
                Err("First element is below the minimum allowed value".to_string())
            } else {
                Ok(num)
            }
        })
}
// 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),
    }
}

Yixian Du

duyixian1234

2 months ago

4.08ms

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())?;
    }
    return 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),
    }
}

panda wiz

pandamrx

2 months 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())?; // <- Returns an Option<&i32>
    if *first_element < min_value {
        return Err("First element is below the minimum allowed value".to_string())?;
    }
    return 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),
    }
}

VerweyFr

2 months ago

3.43ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first();
    first_element.ok_or(String::from("Vector is empty"))?;
    
    match first_element {
        Some(value) => {
            if *value < min_value {
                return Err(String::from("First element is below the minimum allowed value"))
            } else {
                return Ok(*value)
            }
        },
        None => return 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),
    }
}

chuyuanlinzi

2 months ago

3.63ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    if numbers.is_empty(){
        return Err("Vector is empty".to_string());
    }
    let first_element = numbers.first().ok_or("Vector is empty".to_string())?; // <- Returns an Option<&i32o>
    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),
    }
}

gsspdev

2 months ago

5.03ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    if numbers.is_empty() {
        return Err("Vector is empty".to_string());
    }
    let first = numbers.first().ok_or("Vector is empty".to_string()).copied();
    if *first.as_ref().unwrap() < min_value {
        return Err("First element is below the minimum allowed value".to_string())
    }
    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),
    }
}

Aurimas Kuniutis

auriku

2 months ago

3.43ms

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")?;
    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),
    }
}

Aurimas Kuniutis

auriku

2 months ago

3.68ms

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")?;
    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),
    }
}

lugtester

2 months ago

4.54ms

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>
    first_element.ok_or("Vector is empty".to_string())?;
    match first_element {
        Some(x) if *x >= min_value => Ok(*x),
        _ => Err(String::from("First element is below the minimum allowed value"))
    }
}
// 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),
    }
}

Dhananjay Pandit

djpandit007

2 months ago

35.57ms

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)
}
// 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),
    }
}

linz

hnlinzhi19

2 months ago

5.28ms

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.lt(&min_value){
         Err("First element is below the minimum allowed value".to_string())
            }else{
               Ok(first_element).copied() 
            }
        
}
// 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),
    }
}

JeromeCheze

2 months 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("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),
    }
}

Enriko

rix71

2 months ago

3.99ms

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 {
        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),
    }
}

MonshDI

monshdi

2 months ago

3.85ms

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 {
        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),
    }
}