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.

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Solutions

Pranav Garg

PranavGarg01

a day ago

4.63ms

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);
        }
    }
    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
}

amaneru

7ma8no9

3 days ago

3.83ms

89.25kb

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
}

zawwwu

3 days ago

5.69ms

89.23kb

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

Éric Villani

TheTrueCaligari

4 days ago

4.56ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    for x in numbers {
        if x % 2 == 0 {
            return Some(*x);
        }
    }
    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
}

AKA.MoneyTaker

M4Bo2

5 days ago

6.19ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...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 &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
}

Dyaa Adel

dyaa-adel

7 days ago

4.58ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for val in numbers {
        if (val % 2) == 0 {
            return Option::Some(*val);
        }
    }
    return Option::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
}

Lê Minh Quân

aleister1102

8 days ago

4.84ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    numbers.iter().find(|number| *number % 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
}

Anıl Şenay

anilsenay

9 days ago

5.25ms

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
}

Benjamin Falk

lumio

9 days ago

4.38ms

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
}

Yi Hao

leongyihao

10 days ago

4.75ms

89.25kb

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

Guilherme Cesário Strachan

strachan

10 days ago

4.99ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    for x in numbers {
        if x % 2 == 0 {
            return Some(*x);
        }
    }
    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
}

TiagONTOP

10 days ago

3.99ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    if numbers.len() == 0 {
        return None;
    }
    for (index, value) in numbers.iter().enumerate() {
        if value % 2 == 0 {
            return Some(numbers[index]);
        }
        if index == numbers.len()-1 {
            return None;
        }
    }
    
    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
}

Ayushman Rathore

Spartan09

11 days ago

5.63ms

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
}

norabbito

11 days ago

5.16ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    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
}

McToady.eth

McCoady

12 days ago

3.64ms

89.25kb

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
}

Jordan

Jordan-Haidee

13 days ago

5.32ms

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
}

Kyle Diaz

kylediaz

14 days ago

3.66ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    for v in numbers.iter().filter(|n| *n % 2 == 0) {
        return Some(*v);
    }
    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
}

Diego Maia

diegocmsantos

14 days ago

4.05ms

89.25kb

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
}

Kenneth Love

kennethlove

16 days ago

4.26ms

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
}

tzmijewski

16 days ago

3.89ms

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
}

Prafful

iamsahu

16 days ago

3.83ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    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
}

Donald Huber-Youmans

dHuberYoumans

17 days ago

4.33ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    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
}

Suraj Vijayan

its-me-sv

18 days ago

9.44ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    numbers.iter().find(|&&no| no % 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
}

Muhammad-Dennis

18 days ago

4.14ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    numbers.iter().find(|&num| num % 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
}

ludovicknecht

18 days ago

4.09ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    for &number in numbers {
        if number % 2 == 0 {
            return Some(number);
        }
    }
    None
}

Whisper_icoma

1378046967

19 days ago

4.04ms

89.25kb

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
}

manuelmj

19 days ago

5.56ms

89.25kb

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
}

manuelmj

19 days ago

7.42ms

89.25kb

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
}

manuelmj

19 days ago

7.95ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    if let Some(number) = numbers.iter().position(|&element| element % 2 == 0 ){
        return Some(numbers[number]);
    }else{
        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
}

kosay

sarub0b0

20 days ago

6.39ms

89.25kb

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

alemack17

20 days ago

4.36ms

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
}

automata-studio

20 days ago

4.36ms

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
}

Denis SOURON

Brack0

20 days ago

3.72ms

89.25kb

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

TeDeMos

21 days ago

3.88ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    numbers.iter().find(|&i| i % 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
}

Romain Grimau

Herrgrim0

21 days ago

3.73ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    match numbers.iter().filter(|i| *i % 2 == 0).next() {
        Some(i) => 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
}

RiyadDz22

21 days ago

3.63ms

89.25kb

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
}

iamforgettable

22 days ago

7.61ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    for val in numbers.iter() {
        if val % 2 == 0 {
            return Some(*val);
        }
    }
    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
}

Jun Huang

leemars

22 days ago

4.25ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    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
}

roux g. buciu

adudenamedruby

22 days ago

5.50ms

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
}

Nikita Smirnov

Nismirno

22 days ago

34.98ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    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
}

Viktor Merkurev

fennr

22 days ago

4.29ms

89.25kb

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
}

Elliott Draper

ejdraper

23 days ago

4.78ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    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
}

Algorab

23 days ago

3.58ms

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
}

Kentaro Abe

abekem

23 days ago

6.02ms

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
}

Illus1on

hjklchan

24 days ago

5.86ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    numbers.iter().find(|n| **n % 2 == 0).map(|ref_n| *ref_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
}

Illus1on

hjklchan

24 days ago

4.63ms

89.23kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    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
}

Suresh Prajapati

toddlers

24 days ago

4.08ms

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
}

エヴァンゲリオン

Lu-zihang

24 days ago

3.63ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    numbers.iter().find(|it| *it % 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
}

Simon Noetzlin

sainoe

24 days ago

4.04ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
   for &num in numbers.iter(){
        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
}

Stefan Roas

sroas

25 days ago

5.69ms

89.25kb

pub fn find_first_even(numbers: &[i32]) -> Option<i32> {
    // Your code here...
    numbers.iter().find(|it| *it % 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
}