Using Option<T> for Optional Values

Rust's Option<T> is a powerful enum type that represents a value that might or might not be present. It is often used to safely handle cases where a value could be missing or invalid.

The Option<T> enum has two variants:

Some(T) which contains a value of type T.
None which signifies the absence of a value.

Your Task

In this challenge, you will implement a function find_first_even that takes a list of integers and returns the first even number in the list wrapped in Some. If no even number is present, the function should return None.

For example:

If the input list is [1, 3, 5, 8, 10], the function should return Some(8).
If the input list is [1, 3, 5], the function should return None.

Your task is to implement the function so it correctly handles any list of integers.

Editor not available on Mobile!

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

Solutions

Heorhii

Kagev

2 days ago

4.29ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for &number in numbers.iter() {
        if number % 2 == 0 {
            return Some(number);
        }
    } None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

lurah11

2 days ago

3.61ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
     for ele in numbers.iter(){
        if ele % 2 == 0 {
            return Some(*ele)
        }
     }
     None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

lurah11

2 days ago

4.78ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
     numbers.iter().find(|&x|x%2==0).copied()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

lurah11

2 days ago

5.13ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
     numbers.into_iter().find(|&x|x%2==0).copied()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Christophe Mohimont

mohic

2 days ago

3.71ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    numbers.iter().find(|n| **n % 2 == 0).cloned()
}

Christophe Mohimont

mohic

2 days ago

3.75ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    numbers.iter().find(|n| **n % 2 == 0).cloned()
}

P S

psvr

4 days ago

5.24ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
   numbers.iter().find(|number| *number % 2 == 0 ).copied() 
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

firefly

KamisAyaka

6 days ago

3.94ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for i in numbers {
        if i % 2 == 0{
            return Some(*i);
        }
    }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

But a Learner

ButALearner

6 days ago

4.28ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for num in numbers.iter() {
        if num % 2 == 0 {
            return Some(*num)
        }
        
    }
    return None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

amdfxlucas

6 days ago

5.47ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
 numbers.iter().find_map( |x|{ if x%2==0 {Some(*x)} else { None} } )
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

muemart

6 days ago

4.46ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    for i in numbers.iter() {
        if i % 2 == 0 {
            return Some(*i);
        }
    }
    return None;
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Paul-Lucas Mock

mockpa

6 days ago

5.23ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
   for i in numbers{
       if *i%2==0{
           return Some(*i);
       }
   }
    return None;
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Juan Mejia

juan-mejia

7 days ago

4.86ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    return numbers.iter().find(|&num| num % 2 == 0 ).copied();
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

ashishkr2912

8 days ago

4.05ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    // for n in numbers{
    //     if n%2==0{
    //         return Some(*n);
    //     }
    // }
    // None
    numbers.iter()
        .find(|&n| n % 2 == 0)
        .copied()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Bryan

yuyangchen23

9 days ago

3.92ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for i in numbers.iter() {
        if *i % 2 == 0 {
            return Some(*i);
        } 
    }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

achla95

11 days ago

3.91ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
   for &number in numbers {
    if number % 2 == 0 {
        return Some(number);
    }
   }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

johnson

ssebide

12 days ago

5.02ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for &num in numbers{
        if num % 2 == 0{
            return Some(num);
        }
    }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

StevenCanDrink

14 days ago

4.14ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    let even_numbers = numbers
        .into_iter()
        .filter(|&v| (v & 1) == 0)
        .next()
        .copied();
    even_numbers
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Thomas Michiels

mithom

14 days ago

4.20ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    numbers.iter().find(|&&x| x % 2 == 0).map(|x|*x)
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Thomas Michiels

mithom

14 days ago

3.85ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    numbers.iter().find(|&&x| x % 2 == 0).copied()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Fanzzzd

15 days ago

4.64ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    numbers.iter().find( |&&n| n % 2 == 0).copied()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

GunGraveCpp

15 days ago

4.13ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    numbers.iter().find(|&&x| {x % 2 == 0 }).copied()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

David Rasch

dcrasch

15 days ago

3.92ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    numbers.iter().find(|&&x|x%2==0).copied()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

undefeated_

boyboi86

15 days ago

4.74ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for &n in numbers.iter() {
        if n % 2 == 0 {
            return Some(n);
            }
    }
    None
    
    
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Lvfalue

16 days ago

4.45ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for &n in numbers {
        if n % 2 == 0 {
            return Some(n);
        }
    }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

jovarmath

17 days ago

3.84ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for &number in numbers {
        if number % 2 == 0 {
            return Some(number);
        }
    }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

yaniel-dr

18 days ago

4.86ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    numbers.iter().find(|number| *number % 2 == 0 ).copied()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

guinrt

18 days ago

4.07ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for i in numbers {
        if i % 2 == 0 {
            return Some(*i);
        }
    }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

guinrt

18 days ago

4.36ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for i in numbers {
        if i % 2 == 0 {
            return Some(*i);
        }
    }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

wytsier

18 days ago

4.02ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for number in numbers {
        if number % 2 == 0 {
            return Some(*number);
        }
    }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Jean-baptiste JOFFRE

Indy79

19 days ago

4.01ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    numbers.iter().filter(|&n| n % 2 == 0).next().map(|n| *n)
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

visanr

21 days ago

4.78ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    numbers.iter().find(|num| { *num % 2 == 0}).copied()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Walter White

durgaprasad118

21 days ago

4.01ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
  for i in numbers{
    if i%2==0{
        return Some(*i);
    }
  }
  None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

toto

21 days ago

4.73ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    numbers.iter().find(|number| *number & 1 == 0).copied()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Lucas Watkins

lucas-watkins

22 days ago

4.35ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    for i in numbers.iter() {
        if *i % 2 == 0 {
            return Some(*i); 
        }
    }
    return None; 
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Luka Bračun

lbracun

23 days ago

4.17ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    numbers.iter().find(|&n| n % 2 == 0).cloned()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

bzdula

24 days ago

4.13ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    numbers.into_iter().find(|item| *item % 2 == 0).copied()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Ranjith Thangavel

RanjithECE24

25 days ago

3.76ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for value in numbers {
        if *value % 2 == 0 {
            return Some(*value);
        }
    }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Christopher Deutsch

chrisdeutsch

a month ago

3.96ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    numbers.iter().find(|&p| p % 2 == 0).copied()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Dimas Avrian Fachriza.

FForFachriza

a month ago

5.15ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    for n in numbers {
        if n % 2 == 0 {
           return Some(*n);
        }
    }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

drauch

a month ago

4.78ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    numbers.iter().find(|n| *n%2 == 0).cloned()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Wouter

WouterMartens

a month ago

4.09ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    numbers.iter().find(|&&n| &n % 2 == 0).copied()
}
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

whhc

a month ago

3.63ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    numbers.iter().filter(|x| *x % 2 == 0).next().cloned()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

YVV

yvv4git

a month ago

4.14ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    for num in numbers {
        if num % 2 == 0 {
            return Some(*num)
        }
    }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Andy Randrianirina

andyslash

a month ago

3.71ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for item in numbers.iter() {
        if item%2 == 0 {
            return Some(*item);
        }
    }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

shahab-tplus

a month ago

5.97ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for n in numbers {
        if n % 2 == 0 {
            return Some(*n);
        }
    }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

noomcreator

a month ago

4.00ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for number in numbers {
        if number % 2 == 0 {
            return Some(*number);
        }
    }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

Daniel Mestas

miel-codeai

a month ago

4.56ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    numbers.iter().find(|&number| number % 2 == 0).copied()
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

aey4

a month ago

3.93ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
   for number in numbers{
        if number % 2 == 0{
            return Some(*number);
        }
   }
   None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}

yba01

a month ago

4.03ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for &i in numbers {
        if i%2==0{
            return Some(i)
        }
    }
    None
}
// Example usage
pub fn main() {
    let nums1 = vec![1, 3, 5, 8];
    let nums2 = vec![1, 3, 5];
    println!("{:?}", find_first_even(&nums1)); // Output: Some(8)
    println!("{:?}", find_first_even(&nums2)); // Output: None
}