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Commit 02c20ee

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Add num_unique_emails
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‎README.md

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@@ -32,6 +32,7 @@ LeetCode is a website that has programming-related questions that are designed t
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| 713 | Subarray Product Less Than K | [Rust](https://github.com/martinxxd/leetcode-rust/tree/master/./src/leetcode/problem/num_subarray_product_less_than_k.rs) | [Leetcode](https://leetcode.com/problems/subarray-product-less-than-k/) | Medium |
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| 774 | Minimize Max Distance to Gas Station | [Rust](https://github.com/martinxxd/leetcode-rust/tree/master/./src/leetcode/challenge/minmax_gas_dist.rs) | [Leetcode](https://leetcode.com/problems/minimize-max-distance-to-gas-station/) | Medium |
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| 875 | Koko Eating Bananas | [Rust](https://github.com/martinxxd/leetcode-rust/tree/master/./src/leetcode/problem/min_eating_speed.rs) | [Leetcode](https://leetcode.com/problems/koko-eating-bananas/) | Medium |
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| 929 | Unique Email Addresses | [Rust](https://github.com/martinxxd/leetcode-rust/tree/master/./src/leetcode/challenge/num_unique_emails.rs) | [Leetcode](https://leetcode.com/problems/unique-email-addresses/) | Easy |
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| 1035 | Uncrossed Lines | [Rust](https://github.com/martinxxd/leetcode-rust/tree/master/./src/leetcode/problem/max_uncrossed_lines.rs) | [Leetcode](https://leetcode.com/problems/uncrossed-lines/) | Medium |
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| 1134 | Armstrong Number | [Rust](https://github.com/martinxxd/leetcode-rust/tree/master/./src/leetcode/problem/is_good_array.rs) | [Leetcode](https://leetcode.com/problems/armstrong-number/) | Easy |
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| 1137 | N-th Tribonacci Number | [Rust](https://github.com/martinxxd/leetcode-rust/tree/master/./src/leetcode/challenge/tribonacci.rs) | [Leetcode](https://leetcode.com/problems/n-th-tribonacci-number/) | Easy |

‎src/leetcode/challenge/mod.rs

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@@ -5,6 +5,7 @@ mod max_length;
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mod minmax_gas_dist;
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mod moves_to_chessboard;
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mod num_distinct;
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mod num_unique_emails;
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mod shortest_distance;
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mod shortest_path;
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mod spiral_order;
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use std::collections::HashSet;
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// 929. Unique Email Addresses, Easy
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// https://leetcode.com/problems/unique-email-addresses/
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impl Solution {
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pub fn num_unique_emails(emails: Vec<String>) -> i32 {
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let mut set = HashSet::new();
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for email in emails {
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let email: Vec<_> = email.split('@').collect();
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let mut vhost: String = email[0].to_string().replace(".", "");
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if vhost.contains("+") {
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vhost = vhost.split('+').next().unwrap().to_string();
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}
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let domain: String = email[1].to_string();
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set.insert(format!("{}@{}", vhost, domain));
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}
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return set.len() as i32;
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}
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}
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struct Solution {}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::vec_string;
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#[test]
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fn test_num_unique_emails() {
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assert_eq!(
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Solution::num_unique_emails(vec_string![
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"test.email+alex@leetcode.com",
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"test.e.mail+bob.cathy@leetcode.com",
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"testemail+david@lee.tcode.com"
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]),
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2
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);
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}
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#[test]
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fn test_num_unique_emails2() {
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assert_eq!(Solution::num_unique_emails(vec_string!["a@leetcode.com", "b@leetcode.com", "c@leetcode.com"]), 3);
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}
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#[test]
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fn test_num_unique_emails3() {
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assert_eq!(Solution::num_unique_emails(vec_string!["a@leetcode.com", "a@leetcode.com"]), 1);
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}
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#[test]
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fn test_num_unique_emails4() {
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assert_eq!(Solution::num_unique_emails(vec_string![]), 0);
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}
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}

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