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unique-email-addresses.rs
67 lines (63 loc) · 1.8 KB
/
unique-email-addresses.rs
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struct Solution;
impl Solution {
pub fn num_unique_emails(emails: Vec<String>) -> i32 {
use std::collections::HashSet;
emails
.into_iter()
.map(|email| {
let (mut at, mut plus) = (false, false);
email
.chars()
.filter(|c| match c {
'@' => {
at = true;
plus = false;
true
}
'+' if !at => {
plus = true;
false
}
'.' if !at => false,
_ if plus => false,
_ => true,
})
.collect::<String>()
})
.collect::<HashSet<String>>()
.len() as i32
}
}
fn main() {
println!(
"{}",
Solution::num_unique_emails(vec![
"[email protected]".to_string(),
"[email protected]".to_string(),
"[email protected]".to_string()
])
)
}
#[cfg(test)]
mod tests {
use crate::Solution;
#[test]
fn test() {
assert_eq!(
Solution::num_unique_emails(vec![
"[email protected]".to_string(),
"[email protected]".to_string(),
"[email protected]".to_string()
]),
2
);
assert_eq!(
Solution::num_unique_emails(vec![
"[email protected]".to_string(),
"[email protected]".to_string(),
"[email protected]".to_string()
]),
3
);
}
}