Question_3059.md

LeetCode Records - Question 3059 Find All Unique Email Domains

Attempt 1: Use apply() and size()

import pandas as pd

def getEmailDomain(email):
    email_domain = email.rsplit('@')[-1]
    if email_domain[-4:] == '.com':
        return email_domain
    else:
        return None

def find_unique_email_domains(emails: pd.DataFrame) -> pd.DataFrame:
    emails['email_domain'] = emails['email'].apply(getEmailDomain)
    return emails.groupby('email_domain').size().rename('count').reset_index().sort_values('email_domain')

• Runtime: 370 ms (Beats: 100.00%)
• Memory: 66.02 MB (Beats: 62.50%)