标签:Email domain Hash Addresses emails email com leetcode name
Every valid email consists of a local name and a domain name, separated by the '@'
sign. Besides lowercase letters, the email may contain one or more '.'
or '+'
.
- For example, in
"alice@leetcode.com"
,"alice"
is the local name, and"leetcode.com"
is the domain name.
If you add periods '.'
between some characters in the local name part of an email address, mail sent there will be forwarded to the same address without dots in the local name. Note that this rule does not apply to domain names.
- For example,
"alice.z@leetcode.com"
and"alicez@leetcode.com"
forward to the same email address.
If you add a plus '+'
in the local name, everything after the first plus sign will be ignored. This allows certain emails to be filtered. Note that this rule does not apply to domain names.
- For example,
"m.y+name@email.com"
will be forwarded to"my@email.com"
.
It is possible to use both of these rules at the same time.
Given an array of strings emails
where we send one email to each email[i]
, return the number of different addresses that actually receive mails.
Example 1:
Input: emails = ["test.email+alex@leetcode.com","test.e.mail+bob.cathy@leetcode.com","testemail+david@lee.tcode.com"] Output: 2 Explanation: "testemail@leetcode.com" and "testemail@lee.tcode.com" actually receive mails.
Example 2:
Input: emails = ["a@leetcode.com","b@leetcode.com","c@leetcode.com"] Output: 3
Constraints:
1 <= emails.length <= 100
1 <= emails[i].length <= 100
email[i]
consist of lowercase English letters,'+'
,'.'
and'@'
.- Each
emails[i]
contains exactly one'@'
character. - All local and domain names are non-empty.
- Local names do not start with a
'+'
character.
Code:
class Solution: def numUniqueEmails(self, emails: List[str]) -> int: emailSet = set() for email in emails: emailSet.add(self.getEmail(email)) return len(emailSet) def getEmail(self, email): localName, domain = email.split('@', 1) localName = localName.split('+', 1)[0].replace('.', '') return localName + '@' + domain
标签:Email,domain,Hash,Addresses,emails,email,com,leetcode,name 来源: https://www.cnblogs.com/Johnsonxiong/p/15092614.html
本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享; 2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关; 3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关; 4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除; 5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。