58 lines
1.3 KiB
Rust
58 lines
1.3 KiB
Rust
use std::collections::HashSet;
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fn process_local_part(s: &str) -> String {
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match s.find('+') {
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Some(plus_index) => &s[0..plus_index],
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None => s,
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}
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.replace('.', "")
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}
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#[cfg(test)]
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mod process_local_part_tests {
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use super::process_local_part;
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#[test]
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fn processing_works() {
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let result = process_local_part("a.b+c");
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assert_eq!(result, "ab");
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}
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#[test]
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fn processing_without_plus_works() {
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let result = process_local_part("a.b");
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assert_eq!(result, "ab");
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}
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}
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pub fn num_unique_emails(emails: Vec<String>) -> i32 {
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let mut unique_emails = HashSet::new();
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for email in emails.iter() {
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let parts: Vec<&str> = email.split('@').collect();
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unique_emails.insert(format!("{}@{}", process_local_part(parts[0]), parts[1]));
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}
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unique_emails.len() as i32
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}
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#[cfg(test)]
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mod num_unique_emails_tests {
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use super::num_unique_emails;
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#[test]
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fn num_unique_emails_is_correct() {
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let result = num_unique_emails(
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[
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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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.iter()
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.map(|s| s.to_string())
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.collect(),
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);
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assert_eq!(result, 2)
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}
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}
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