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

Ayushman Rathore

Spartan09

8 hours 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

8 hours 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

8 hours 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

8 hours 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(())
}

manuelmj

2 days 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

7 days 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

8 days 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

11 days 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

12 days 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

14 days 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

15 days 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

16 days 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

17 days 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

19 days 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(())
}

エヴァンゲリオン

Lu-zihang

22 days ago

4.30ms

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(()),
    }
}

Florian Gaudin-Delrieu

FlorianGD

24 days ago

4.05ms

81.43kb

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

Sthitaprajna Sahu

sthitasahu

25 days 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(())
}

dawwestk

a month ago

3.10ms

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(())
}

PangoSea

kapaseker

a month ago

3.22ms

81.43kb

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

Marco-Normal

a month ago

3.18ms

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());
    }
    return Ok(());
}

matsuyama-k1

a month ago

3.12ms

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(())
}

vikingNR

a month ago

3.36ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    match (age < 0 || age > 120, email.contains("@"), email.is_empty()){
        (true, _,_) => Err("Invalid age".to_string()),
        (_,false,false) => Err("Invalid email".to_string()),
        (_,_,true) =>Err("Name is empty".to_string()),
        _ => Ok(())
    }
    
}

Ahmet Özcan

ahmetoozcan

a month ago

3.01ms

81.43kb

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

Ahmet Özcan

ahmetoozcan

a month ago

5.63ms

81.43kb

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

mm-yyyy

a month ago

3.18ms

81.43kb

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

Mikhail Shutov

mshutov

a month ago

3.68ms

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(())
}

Dominicm99

a month ago

3.49ms

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(())
}

nedrw

a month ago

3.12ms

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(())
}

rawar089

a month ago

3.27ms

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("@") {
      Ok(())    
    } else {
      Err("Invalid email".to_string()) 
    }
    
}

Infinite Time

InfiniteTime3000

a month ago

3.15ms

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());
    }
    Ok(())
}

PavelPerna

a month ago

3.15ms

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(())
}

Stan

i2z4

a month ago

3.02ms

86.72kb

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

L-Super

a month ago

3.52ms

81.43kb

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

zahrajavar

a month ago

3.31ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    // Implement here
    if age < 1 || age > 119{
        return Err ("Invalid age".to_string());
    }
    if !email.contains('@') {
        return Err ("Invalid email".to_string());
    }
    Ok(())
}

Kamuran

karapy

a month ago

3.07ms

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(())
    
}

DerWiesel206

a month ago

3.53ms

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(())
}

Lauri Sarap

LauriSarap

a month ago

7.69ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err("Invalid age".to_string());
    }
    let mut contains_at = false;
    let characters = email.chars();
    for (idx, char) in characters.enumerate() {
        if char == '@' {
            contains_at = true;
        }
    }
    if contains_at == false {
        return Err("Invalid email".to_string());
    }
    Ok(())
}

Larry Oates

Leafmun-certii

a month ago

4.41ms

81.43kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age > 120 || age < 0{
        return Err("Invalid age".to_string())
    }
    if email.find("@") == None {
        return Err("Invalid email".to_string())
    }
    Ok(())
}

Tarokc

a month ago

3.36ms

81.43kb

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

aey4

a month ago

4.71ms

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(())
}

viky

vikyw89

a month ago

4.34ms

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(());
}

chuyuanlinzi

a month ago

2.88ms

81.43kb

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

Caio César

caiocdcs

a month 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(())
}

Casper Bottelet

Bottelet

a month ago

3.03ms

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(())
}

RonaldoArayadev

a month ago

3.01ms

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(())
}

vgpetrov

a month ago

4.61ms

86.72kb

pub fn validate_user(age: i32, email: &str) -> Result<(), String> {
    if age < 0 || age > 120 {
        return Err(String::from("Invalid age"));
    }
    if email.is_empty() {
        return Err(String::from("Invalid email"));
    }
    let mut split = email.split("@");
    split.next().ok_or("Invalid email")?;
    let tail = split.next().ok_or("Invalid email")?;
    let mut x = tail.split(".");
    x.next().ok_or("Invalid email")?;
    x.next().ok_or("Invalid email")?;
    Ok(())
}

Yamami

Yamami1221

a month ago

3.38ms

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(());
}

Denis SOURON

Brack0

a month ago

3.07ms

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(())
}

JeppeFoldberg

a month ago

3.00ms

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(())
}

Chris

chriswmann

a month ago

2.90ms

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(())
}