Lifetimes

Lifetimes in Rust ensure that references are valid for as long as they are needed. The Rust compiler uses lifetimes to prevent dangling references, ensuring memory safety at compile time without the need for a garbage collector.

A common scenario where lifetimes come into play is when working with functions that accept or return references. To ensure the correct association between input references and output references, lifetimes are explicitly annotated.

In this challenge, you'll implement a function that finds the longest string slice from two provided references. The function will use lifetimes to ensure that the returned reference is valid for as long as both input references are valid.

Your Task

Write a function longest that takes two string slices and returns the longest one. If both slices are of the same length, return the first one.

Hints

Click here to reveal hints

Use explicit lifetime annotations in the function signature, such as 'a. e.g

fn longest<'a>(first: &'a str, second: &'a str) -> &'a str {
    // implementation goes here
}

Rust allows you to compare the lengths of strings using the .chars().count() method.

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Solutions

Nicolai

Posmac

4 days ago

4.84ms

89.26kb

pub fn longest<'a>(first: &'a str, second: &'a str) -> &'a str {
    // implementation goes here
    
    if first.chars().count() > second.chars().count() {
        return first;
    } else if first.chars().count() < second.chars().count() {
        return second;
    }
    return first;
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

agamaontherock

4 days ago

6.22ms

89.26kb

pub fn longest<'a>(first:&'a str, second: &'a str) -> & 'a str {
    if first.chars().count() >= second.chars().count() {
        first
    } else {
        second
    }
} 
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Khalifa

e1ec30

5 days ago

6.64ms

89.26kb

pub fn longest<'a>(str1: &'a str, str2: &'a str) -> &'a str {
    let l1 = str1.chars().count();
    let l2 = str2.chars().count();
    if l2 > l1 {
        return str2;
    }
    str1
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

roboquaternion

9 days ago

7.27ms

89.26kb

pub fn longest<'a>(first: &'a str, second: &'a str) -> &'a str {
    if &second.chars().count() > &first.chars().count() {
        return second;
    }
    
    first
    
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Splatrac

splatrac

10 days ago

5.47ms

89.26kb

pub fn longest<'a>(string1: &'a str, string2: &'a str) -> &'a str {
    // Finish the function
    let len1 = string1.chars().count();
    let len2 = string2.chars().count();
    if len1 == len2 {
        string1
    } else if len1 > len2 {
        string1
    } else {
        string2
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Nguyen Vo Hoang Son

sonmessia

11 days ago

4.80ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str {
    if s1.chars().count() >= s2.chars().count() {
        return s1;
    }
    s2
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Health-Care-Movie

11 days ago

5.42ms

89.26kb

pub fn longest<'a>(first: &'a str, second: &'a str) -> &'a str {
    if first.chars().count() >= second.chars().count() { first } else { second }
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Trịnh Chấn Duy

Duyyy123

12 days ago

4.92ms

89.26kb

pub fn longest<'a>(slice1: &'a str, slice2: &'a str) -> &'a str {
    if slice1.chars().count() < slice2.chars().count() {
        slice2
    } else {
        slice1
    }
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    {
        let s2 = "longer string";
        let result = longest(s1, s2);
        assert_eq!(result, "longer string");
    }
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Liyqq

14 days ago

4.54ms

89.26kb

pub fn longest<'a>(first: &'a str, second: &'a str) -> &'a str {
    if first.chars().count() >= second.chars().count() { first } else { second }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Nathan GAUD

Natchica

21 days ago

6.66ms

89.26kb

pub fn longest<'a>(slice1: &'a str, slice2: &'a str) -> &'a str {
    let length1 = slice1.chars().count();
    let length2 = slice2.chars().count();
    if length1 >= length2 {
        return slice1;
    } else {
        return slice2;
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

shibu-t

25 days ago

31.23ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str {
    // Finish the function
    if s1.chars().count() >= s2.chars().count() {
        s1
    } else {
        s2
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Jakub Wiśniewski

wisniewskij

a month ago

5.33ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str { // Finish the function
    if s1.chars().count() >= s2.chars().count() {
        return &s1;
    } 
    return &s2;
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

mishbah

a month ago

4.07ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str {
    if s1.chars().count() >= s2.chars().count() {
        s1
    } else {
        s2
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Jason

Jason-fy-wang

a month ago

4.39ms

89.26kb

pub fn longest<'a>(in1: &'a str, in2: &'a str) -> &'a str { // Finish the function
    if in1.chars().count() >= in2.chars().count() {
        in1
    } else {
        in2
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

vijayabhaskar badireddi

ptcte

a month ago

5.68ms

89.26kb

pub fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
    if x.chars().count() >= y.chars().count() {
        x
    } else {
        y
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Tboot

tboot-0510

a month ago

5.65ms

89.26kb

pub fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
    if x.chars().count() >= y.chars().count() {
        x
    } else {
        y
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Assylbek Razakhbergenov

asylbek27

a month ago

5.70ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str{
    if s1.chars().count() >= s2.chars().count() {
        s1
    } else {
        s2
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

VerweyFr

a month ago

4.25ms

89.26kb

pub fn longest<'a>(val1: &'a str, val2: &'a str) -> &'a str {
  if val1.chars().count() >= val2.chars().count() {
    val1
  } else {
    val2
  }
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Suresh Kumar

toddlers

a month ago

5.10ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str {
    let s1_len = s1.chars().count();
    let s2_len = s2.chars().count();
    match s1_len.cmp(&s2_len){
        std::cmp::Ordering::Equal => s1,
        std::cmp::Ordering::Greater => s1,
        std::cmp::Ordering::Less => s2,
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Jason

chenjie1219

2 months ago

5.19ms

89.26kb

pub fn longest<'a>(a: &'a str, b: &'a str) -> &'a str {
    if a.chars().count() >= b.chars().count() {
        a
    } else {
        b
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

lugtester

2 months ago

4.98ms

89.26kb

pub fn longest<'a>(a: &'a str, b: &'a str) -> &'a str{
    match a.chars().count() < b.chars().count() {
        true => b,
        false => a
    }
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Yixian Du

duyixian1234

2 months ago

7.95ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str {
    if s2.chars().count() > s1.chars().count() {
        s2
    } else {
        s1
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Aurimas Kuniutis

auriku

2 months ago

7.02ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str {
    if s2.chars().count() > s1.chars().count() {
        s2
    } else {
        s1
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Cristian Prieto

cprieto

2 months ago

9.03ms

89.26kb

pub fn longest<'a>(a: &'a str, b: &'a str) -> &'a str {
    if a.chars().count() >= b.chars().count() {
        a
    } else {
        b
    }
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Anna Komarova

Vlasanya

2 months ago

8.42ms

89.26kb

pub fn longest<'a>(first: &'a str, second: &'a str) -> &'a str {
    if first.chars().count() >= second.chars().count() {
        first
    } else {
        second
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Artem

tich31337

2 months ago

4.17ms

89.26kb

pub fn longest<'a> (s1: &'a str, s2: &'a str) -> &'a str { // Finish the function
    if s1.chars().count() < s2.chars().count() {
        s2
    } else {
        s1
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Kevin Webb

kpwebb

2 months ago

5.85ms

89.26kb

pub fn longest<'a>(s1:&'a str, s2:&'a str) -> &'a str {
    if s1.chars().count() >= s2.chars().count() {
        return s1;
    } 
    return s2;
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Paulo Lins

pblins

2 months ago

9.87ms

89.26kb

pub fn longest<'a, 'b>(s1: &'a str, s2: &'a str) -> &'a str {
    if s1.chars().count() >= s2.chars().count() {
        s1
    } else {
        s2
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Icarus

IcarusxB

2 months ago

8.32ms

89.26kb

pub fn longest<'a>(a: &'a str, b: &'a str) -> &'a str{
    if a.chars().count() < b.chars().count() {
        b
    } else {
        a
    }
    
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Matthew Li

circles-png

2 months ago

5.93ms

109.76kb

pub fn longest<'a>(a: &'a str, b: &'a str) -> &'a str {
    println!("{}", include_str!("../tests/tests.rs"));
    if a.chars().count() >= b.chars().count() {
        a
    } else {
        b
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Hung Dinh

nhdinh

2 months ago

5.92ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str {
    if s1.chars().count() >= s2.chars().count() {
        s1
    } else {
        s2
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

AnKarl

Zythophilus

2 months ago

4.29ms

89.26kb

pub fn longest<'a>(first: &'a str, second: &'a str) -> &'a str {
    if second.chars().count() > first.chars().count() {
        second
    } else {
        first
    }
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Zeiion

2 months ago

5.51ms

89.26kb

pub fn longest<'a>(s1:&'a str, s2:&'a str) -> &'a str {
    if s1.chars().count() >= s2.chars().count() {
        s1
    } else {
        s2
    }
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Viktor Merkurev

fennr

3 months ago

4.71ms

89.26kb

pub fn longest<'a>(a: &'a str, b: &'a str) -> &'a str {
    if a.chars().count() >= b.chars().count() {
        a
    } else {
        b
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

amaneru

7ma8no9

3 months ago

4.51ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str {
    if s1.chars().count() >= s2.chars().count() {
        s1
    } else {
        s2
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Kentaro Abe

abekem

3 months ago

3.91ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str {
    if s1.chars().count() >= s2.chars().count() {
        return s1;
    } else {
        return s2;
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Guilherme Cesário Strachan

strachan

3 months ago

6.97ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str {
    if s1.chars().count() >= s2.chars().count() {
        return s1;
    }
    s2
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Sandeep chauhan

ryzen-xp

3 months ago

4.78ms

89.26kb

pub fn longest<'a>(s1 : &'a str  , s2 : &'a str)-> &'a str{
    if s1.chars().count() >= s2.chars().count(){
        s1
    }
   
    else {
        s2
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Anıl Şenay

anilsenay

3 months ago

5.28ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str {
    if s1.chars().count() >= s2.chars().count() {
        return s1;
    }
    return s2;
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Romain Grimau

Herrgrim0

3 months ago

4.01ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str {
    if s1.chars().count() >= s2.chars().count() {
        s1
    } else {
        s2
    }
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

AKA.MoneyTaker

M4Bo2

3 months ago

4.76ms

89.26kb

pub fn longest // Finish the functionWrite a function longest that takes two string slices and returns the longest one. If both slices are of the same length, return the first one.
<'a>(s1:&'a str,s2:&'a str)->&'a str{
    if  s1.chars().count() >= s2.chars().count(){
        s1
    }else{s2}
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Dyaa Adel

dyaa-adel

3 months ago

5.90ms

89.26kb

pub fn longest<'a>(s1 : &'a str, s2: &'a str) -> &'a str {
    if (s1.chars().count() >= s2.chars().count()) {
        s1
    } else {
        s2
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Manuel Manjarres R.

manuelmj

3 months ago

5.47ms

89.26kb

pub fn longest<'a>(first_str: &'a str , second_str: &'a str)-> &'a str{
    
    if first_str.chars().count() >= second_str.chars().count() {
        return first_str;
    } 
    second_str 
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Ayushman Rathore

Spartan09

3 months ago

5.38ms

89.26kb

pub fn longest<'a>(substr_one: &'a str, substr_two: &'a str) -> &'a str {
    match (substr_one, substr_two) {
        (a, b) if a.chars().count() >= b.chars().count() => a,
        (_, b) => b
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Jun Huang

leemars

3 months ago

4.70ms

89.26kb

pub fn longest<'a>(first: &'a str, second: &'a str) -> &'a str {
    if first.chars().count() >= second.chars().count() {
        first
    } else {
        second
    }
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

automata-studio

3 months ago

4.69ms

89.26kb

pub fn longest<'a>(slice1 :&'a str, slice2: &'a str) -> &'a str {
    if slice1.chars().count() >= slice2.chars().count() {
        slice1
    }
    else {
        slice2
    }
}
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Jordan

Jordan-Haidee

3 months ago

4.24ms

89.26kb

pub fn longest<'a>(s1:&'a str, s2:&'a str) -> &'a str {
    if s1.chars().count() >= s2.chars().count() {
        s1 
    } else {
        s2
    }
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Kenneth Love

kennethlove

3 months ago

5.16ms

89.26kb

pub fn longest<'a>(one: &'a str, two: &'a str) -> &'a str {
    if one.chars().count() >= two.chars().count() { one } else { two }
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Algorab

3 months ago

4.20ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str {
    if s1.chars().count() >= s2.chars().count() {
        s1
    } else {
        s2
    }
}// Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}

Marco-Normal

3 months ago

4.08ms

89.26kb

pub fn longest<'a>(s1: &'a str, s2: &'a str) -> &'a str {
    if s1.chars().count() >= s2.chars().count() {
        return s1
    }
    s2
} // Finish the function
// Example usage
pub fn main() {
    let s1 = "short";
    let s2 = "longer string";
    let result = longest(s1, s2);
    println!("The longest string is: {}", result);
    assert_eq!(result, "longer string");
    let s3 = "equal";
    let s4 = "equal";
    let result = longest(s3, s4);
    println!("The longest string is: {}", result);
    assert_eq!(result, "equal");
}