Validate User Input

In many programs, validating user input is a common and crucial task. Ensuring that input data adheres to expected formats and constraints can prevent bugs, enhance security, and improve user experience. In this challenge, you will create a function that validates a user's age and email, returning early if any conditions are not met.

Your task

Your task is to implement a function validate_user(age: i32, email: &str) -> Result<(), String> that validates the user's age and email. The function should follow these rules:

If the age is less than 0 or greater than 120, return an error with the message "Invalid age".
If the email does not contain an '@' symbol, return an error with the message "Invalid email".
If both the age and email are valid, return Ok(()).

Here's an example of how to use the early return technique:

fn early_return(name: &str, age: i32) -> Result<(), String> {
    if name.is_empty() {
        return Err("Name is empty".to_string());
    }
 
    if age < 0 {
        return Err("Invalid age".to_string());
    }
 
    Ok(())
}

Example

let result = validate_user(25, "[email protected]");
assert_eq!(result, Ok(()));
 
let result = validate_user(-1, "[email protected]");
assert_eq!(result, Err("Invalid age".to_string()));
 
let result = validate_user(25, "userexample.com");
assert_eq!(result, Err("Invalid email".to_string()));

Hints

Use the return keyword to exit the function early when an invalid condition is encountered.
Consider using the contains method to check if the email contains an '@' symbol.

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Solutions

ikatlinsky

18 hours ago

3.01ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err(String::from("Invalid age"));
    }
    if !email.contains("@") {
        return Err(String::from("Invalid email"))
    }
    Ok(())
}

Aztra Corporation Inc.

AZTRA2022

2 days ago

7.79ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 { return Err("Invalid age".to_string()); }
    if !email.contains('@') { return Err("Invalid email".to_string()); }
    Ok(())
}

Aztra Corporation Inc.

AZTRA2022

2 days ago

3.70ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 { return Err("Invalid age".to_string()); }
    if !email.contains('@') { return Err("Invalid email".to_string()); }
    Ok(())
}

LeonardoPinheiro23

9 days ago

3.88ms

86.72kb

const INVALID_AGE_ERROR_STR: &'static str = "Invalid age";
const INVALID_EMAIL_ERROR_STR: &'static str = "Invalid email";
fn validate_age(age: i32) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err(INVALID_AGE_ERROR_STR.into());
    }
    Ok(())
}
fn validate_email(email: &str) -> Result<(), String> {
    if email.contains('@') {
        return Ok(());
    }
    Err(INVALID_EMAIL_ERROR_STR.into())
}
pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    validate_age(age)?;
    validate_email(email)?;
    Ok(())
}

annececiledunand

13 days ago

3.11ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 { return Err("Invalid age".to_string()); }
    if !email.contains('@') { return Err("Invalid email".to_string()); }
    Ok(())
}

ggnne

17 days ago

3.36ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Tommytto

20 days ago

4.51ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Viktor Merkurev

fennr

22 days ago

3.04ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string())
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string())
    }
    Ok(())
}

Anatma2

23 days ago

3.98ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {return Err("Invalid age".to_string())}
    for i in email.chars()
    {if i == '@' {return Ok(())}}
    return Err("Invalid email".to_string())
}

Anatma2

23 days ago

5.11ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {return Err("Invalid age".to_string())} //error check
    for i in email.chars()
    {
        if i == '@' {return Ok(())}
    }
    return Err("Invalid email".to_string())
}

Liyqq

a month ago

3.44ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    
    Ok(())
}

wertion555

2 months ago

3.23ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if 0 > age || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@"){
        return Err("Invalid email".to_string());
    }
    return Ok(());
}

Hung Dinh

nhdinh

2 months ago

3.20ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

roboquaternion

2 months ago

4.37ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains('@') {
        return Err("Invalid email".to_string())
    }
    Ok(())
}

endrin

2 months ago

3.03ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err(String::from("Invalid age"));
    }
    if !email.contains('@') {
        return Err(String::from("Invalid email"));
    }
    Ok(())
}

Jakub Wiśniewski

wisniewskij

2 months ago

3.40ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    return Ok(());
}

Jason

Jason-fy-wang

2 months ago

3.35ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age <0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains('@') {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

mhd242006

2 months ago

3.30ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    };
    if !email.contains('@') {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

vijayabhaskar badireddi

ptcte

2 months ago

3.93ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    };
    if !email.contains('@') {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Aurimas Kuniutis

auriku

2 months ago

3.21ms

81.43kb

    pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
        if !(0..=120).contains(&age) {
            return Err("Invalid age".to_string());
        }
        if !email.contains("@") {
            return Err("Invalid email".to_string());
        }
        Ok(())
    }

Jason

chenjie1219

2 months ago

3.63ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Marcel Schiffel

mschiffel

3 months ago

3.59ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".into());
    }
    if !email.contains("@") {
        return Err("Invalid email".into());
    }
    Ok(())
}

Dhananjay Pandit

djpandit007

3 months ago

13.10ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    } else if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

syberianbull

3 months ago

4.03ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        Err("Invalid age".to_string())
    } else if !email.contains("@") {
        Err("Invalid email".to_string())
    } else {
        Ok(())
    }
}

VerweyFr

3 months ago

4.05ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
   if age < 1 || age > 120 {
    return Err("Invalid age".to_string());    
   }
   if !String::from(email).contains("@") {
      return Err("Invalid email".to_string()); 
   }
   Ok(())
}

VerweyFr

3 months ago

3.95ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
   if age < 1 || age > 120 {
    return Err("Invalid age".to_string());    
   }
   if !String::from(email).contains("@") {
      return Err("Invalid email".to_string()); 
   }
   Ok(())
}

Yixian Du

duyixian1234

3 months ago

4.07ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.to_string().contains("@") {
        return Err("Invalid email".to_string())
    }
    Ok(())
}

Artem

tich31337

3 months ago

3.70ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.to_string().contains("@") {
        return Err("Invalid email".to_string())
    }
    Ok(())
}

opendatas2017

3 months ago

3.93ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    return Ok(())
}

lugtester

3 months ago

3.03ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    /*
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string())
    }
    if !email.contains('@') {
        return Err("Invalid email".to_string())
    }
    Ok(())
    */
    match (age, email) {
        (age, _) if age < 0 || age > 120 => Err("Invalid age".to_string()),
        (_, email) if !email.contains('@') => Err("Invalid email".to_string()),
        (_, _) => Ok(())
    }
}

panda wiz

pandamrx

3 months ago

4.25ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if email.is_empty() || !email.contains("@") {
        return Err("Invalid email".to_string());
    }
 
    Ok(())
}

hex-order

idan-KH

3 months ago

9.01ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || 120 < age {
        return Err("Invalid age".to_string());
    }
 
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
 
    Ok(())
}

Anna Komarova

Vlasanya

3 months ago

2.95ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
     if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains('@') {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Icarus

IcarusxB

3 months ago

3.44ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains('@') {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

no-yan

3 months ago

4.68ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age <0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

AnKarl

Zythophilus

3 months ago

4.77ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        Err(String::from("Invalid age"))
    } else if !email.contains('@') {
        Err(String::from("Invalid email"))
    } else {
        Ok(())
    }
}

Ayushman Rathore

Spartan09

4 months ago

3.11ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    match (age, email) {
        (age, _) if age < 0 || age > 120 => Err("Invalid age".to_string()),
        (_, email) if !email.contains('@') => Err("Invalid email".to_string()),
        _ => Ok(())
    }
}

Lucas Deprit

lucasdeprit

4 months ago

3.24ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err(String::from("Invalid age"));
    }  
    if !email.contains("@") {
        return Err(String::from("Invalid email"));
    }
    Ok(())
}

Lucas Deprit

lucasdeprit

4 months ago

3.14ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err(String::from("Invalid age"));
    }  
    if !email.contains("@") {
        return Err(String::from("Invalid email"));
    }
    Ok(())
}

Lucas Deprit

lucasdeprit

4 months ago

5.48ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }  
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Manuel Manjarres R.

manuelmj

4 months ago

3.06ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err(String::from("Invalid age"));
    }
    if !email.contains("@"){
        return Err(String::from("Invalid email"));
    }
    Ok(())
}

Éric Villani

TheTrueCaligari

4 months ago

4.18ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age >120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains('@') {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Yi Hao

leongyihao

4 months ago

3.10ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
	if !(0..=120).contains(&age) {
		return Err("Invalid age".to_string())
	}
	if !email.contains("@") {
		return Err("Invalid email".to_string())
	}
	Ok(())
}

Jordan

Jordan-Haidee

4 months ago

3.77ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".into());
    }
    if !email.contains("@") {
        return Err("Invalid email".into());
    }
    Ok(())
}

Nikita Smirnov

Nismirno

4 months ago

3.82ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if !(0..=120).contains(&age) {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

dlloyd1

4 months ago

2.96ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    return Ok(())
}

Christopher Nielson

c-nielson

4 months ago

3.12ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains('@') {
        return Err("Invalid email".to_string());
    }
    return Ok(());
}

SeinPierre

4 months ago

2.91ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if (age < 0) | (age > 120) {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@"){
        return Err("Invalid email".to_string())
    }
    Ok(()
)}

Donald Huber-Youmans

dHuberYoumans

4 months ago

4.85ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if (age < 0) | (age > 120) {
        return Err("Invalid age".to_string());
    }
    if let None = email.chars().find(|c| *c == '@') {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Elliott Draper

ejdraper

4 months ago

2.86ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    if !email.contains("@") {
        return Err("Invalid email".to_string());
    }
    Ok(())
}