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

Egu0

egu0

9 hours ago

3.21ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    let first_element: Option<&i32> = numbers.first();
    if first_element.is_none() {
        first_element.ok_or("Vector is empty".to_string()).copied() // mapping Some(v) to Ok(v), or None to Err(m)
    } else {
        let val = first_element.copied().unwrap();
        if val >= min_value {
            Ok(val)
        } else {
            Err("First element is below the minimum allowed value".to_string())
        }
    }
}

Egu0

egu0

9 hours ago

3.74ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    let first_element: Option<&i32> = numbers.first();
    if first_element.is_none() {
        first_element.ok_or("Vector is empty".to_string()).copied() // mapping Some(v) to Ok(v), or None to Err(m)
    } else {
        let val = first_element.copied().unwrap();
        if val >= min_value {
            Ok(val)
        } else {
            Err("First element is below the minimum allowed value".to_string())
        }
    }
}

Özgür

AyikOzgur

10 hours ago

19.71ms

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),
    }
}

Marouan Boulahtouf

MBoulahtouf

a day ago

3.06ms

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)
    }
}
// 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),
    }
}

azmahflameheart

2 days ago

3.18ms

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(|&n| match n {
                n if n >= min_value => Ok(n),
                _ => 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),
    }
}

ffrie

5 days ago

3.68ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().ok_or("Vector is empty".to_string()); // <- Returns an Option<&i32>
    match first_element {
        Ok(x) if *x < min_value => Err("First element is below the minimum allowed value".to_string()),
        Ok(x) => Ok(*x),
        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),
    }
}

LawisChen

5 days ago

3.60ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let num = numbers
        .first()
        .ok_or("Vector is empty".to_string())
        .copied()?;
    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),
    }
}

cmdrtomalak

6 days ago

5.34ms

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(n) if *n >= min_value => return Ok(*n),
        None => return Err("Vector is empty".to_string()),
        _ => 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),
    }
}

gtakacse

7 days ago

3.30ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element: Result<i32, String> = numbers
        .first()
        .cloned()
        .ok_or(String::from("Vector is empty"));
    match first_element {
        Ok(num) => {
            if num >= min_value {
                Ok(num)
            } else {
                Err(String::from(
                    "First element is below the minimum allowed value",
                ))
            }
        }
        err => err,
    }
}
// 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),
    }
}

Ramon Silva

rsilva1

7 days ago

3.13ms

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(String::from("Vector is empty"))
        .and_then(|&v| {
            match v < min_value {
                true => Err(String::from("First element is below the minimum allowed value")),
                false => 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),
    }
}

vqk-2003

7 days ago

3.52ms

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),
    }
}

Amit Patel

amitpatel-wstf

9 days ago

3.21ms

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),
    }
}

makinpaper

9 days 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")?; // <- 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),
    }
}

Snoweuph

snoweuph

10 days ago

5.91ms

87.44kb

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

fasolyee

fasolyeedev

11 days ago

3.64ms

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(Err("Vector is empty".to_string())); // <- Returns an Option<&i32>
    match first_element{
        Ok(val) =>{
            if *val < min_value{
                return Err("First element is below the minimum allowed value".to_string());
            }
            else{
                return Ok(*val);
            }
        }
        Err(e) =>{
            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),
    }
}

<YoungAncient/>

youngancient

11 days ago

3.26ms

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),
    }
}

Dan Wayne

danwayne-me

11 days ago

3.75ms

87.41kb

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

Ignat S.

Igonato

13 days ago

3.60ms

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());
    }
    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),
    }
}

Omar Saber Talaat Abdelrahman

omar-s-ta

13 days ago

3.32ms

87.38kb

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

Omar Saber Talaat Abdelrahman

omar-s-ta

13 days ago

3.51ms

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),
    }
}

SpontaneousOverthrow

14 days ago

3.37ms

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(&value) if value >= min_value => Ok(value),
        Some(_) => Err(format!("First element is below the minimum allowed value")),
        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),
    }
}

MöNir

Monir-Ruet

18 days ago

3.82ms

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(&value) if value >= min_value => Ok(value),
        Some(_) => Err(format!("First element is below the minimum allowed value")),
        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),
    }
}

Dimas Avrian Fachriza

FForFachriza

20 days ago

8.63ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first();
    match first_element {
        None => {
            Result::Err("Vector is empty".to_string())
        }
        Some(t) => {
            if numbers[0] < min_value {
                Result::Err("First element is below the minimum allowed value".to_string())
            } else {
            Result::Ok(*t)
            }
        }
    }
}
// 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),
    }
}

Asrul Firdaus

AsrulF

20 days ago

3.27ms

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(num) if *num < min_value => Err("First element is below the minimum allowed value".to_string()),
        Ok(num) => Ok(*num),
        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),
    }
}

Dharm Singh

dharmvr1

21 days ago

4.09ms

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 {
        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),
    }
}

kasaxpong

21 days ago

3.86ms

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(&v) if v >= min_value => Ok(v),
        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),
    }
}

noname

random1106

22 days ago

4.31ms

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(&v) if v >= min_value => Ok(v),
        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),
    }
}

Mykhailo Huzhvii

Ymkavi

24 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())?;
    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),
    }
}

yrd241

24 days ago

3.85ms

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)
    }
}
// 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),
    }
}

Bastien VINH

bastienvinh

a month ago

3.35ms

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());
        // Return the first element if it is greater than or equal to the minimum value
        // Return an error if the first element is less than the minimum value
        // Return an error if the vector is empty
    }
    // Return the first element if it is greater than or equal to the minimum 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),
    }
}

银雀Sparrxw

Sparr0www820

a month ago

3.31ms

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".into())
    } 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),
    }
}

0xdangit

a month ago

4.11ms

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");
    // match first_element {
    //     Ok(num) => {
    //         if *num < min_value {
    //             return Err("First element is below the minimum allowed value".to_string());
    //         }
    //         Ok(*num)
    //     },
    //     Err(e) => Err(e.to_string())
    // }
    let first_element = numbers.first()
                                .ok_or("Vector is empty".to_string())
                                .and_then(|num| {
                                    if *num < min_value {
                                        return Err("First element is below the minimum allowed value".to_string());
                                    }
                                    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),
    }
}

0xdangit

a month ago

3.48ms

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");
    match first_element {
        Ok(num) => {
            if *num < min_value {
                return Err("First element is below the minimum allowed value".to_string());
            }
            Ok(*num)
        },
        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),
    }
}

Kishan

wdcs-kishansudani

a month ago

4.26ms

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(|value| {
            if *value >= min_value {
                Ok(*value)
            } else {
                Err(format!("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),
    }
}

/sam

samging

a month ago

6.62ms

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

Dr. Frederik Lauber

FrederikLauber

a month ago

3.54ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    let first_element = numbers.first(); // <- Returns an Option<&i32>
    let number = first_element.ok_or("Vector is empty".to_owned())?;
    if *number >= min_value {
        Ok(*number)
    } 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),
    }
}

Ari Karim

arikarim

a month ago

4.34ms

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("Vector is empty".to_string()).copied()?;
    if val < min_value {
        Err("First element is below the minimum allowed value".to_string())
    } else {
        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),
    }
}

Yummy-Yums

a month ago

3.50ms

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

SubZ69

a month ago

3.74ms

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 {
        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),
    }
}

Zisraw

a month 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 = numbers.first().ok_or("Vector is empty".to_string())?; // <- Returns an Option<&i32>
    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),
    }
}

Vincent SAMY

vsamy

a month ago

3.91ms

87.38kb

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

Vincent SAMY

vsamy

a month ago

3.40ms

87.44kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    let first_element = numbers.first().copied().ok_or("Vector is empty")?;
    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),
    }
}

Yashwanth

Yash981

a month ago

3.36ms

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())?; // <- 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),
    }
}

danyaffe63

a month ago

3.99ms

87.41kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element: &i32 = 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),
    }
}

Kangyan-Zhou

a month ago

4.14ms

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());
    }
    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),
    }
}

jfloresremar

a month ago

3.74ms

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 {
        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),
    }
}

Abhishek Sharma

0xAbhiDev

2 months ago

3.96ms

87.38kb

pub fn get_first_element(numbers: Vec<i32>, min_value: i32) -> Result<i32, String> {
    // Finish the function
    let first_element = numbers.first().clone(); // <- Returns an Option<&i32>
    let value = first_element.ok_or(format!("Vector is empty"));
    match value {
        Ok(v)=> if *v>=min_value {
            Ok(*v)
        }
        else {
            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),
    }
}

nojae15

2 months ago

3.35ms

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),
    }
}

nojae15

2 months ago

3.27ms

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),
    }
}

reborn3d

2 months 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 &res = first_element.ok_or(String::from("Vector is empty"))?;
    if res >= min_value {
        Ok(res)
    } else {
        Err(String::from("First element is below the minimum allowed value"))
    }
    /*match first_element.ok_or(""){
        Ok(&value) => {
            if value < min_value{
                return Err(String::from("First element is below the minimum allowed value"));
            }
            else {
                return Ok(value);
            }
        },
        Err(_) => return 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),
    }
}