Javascript one-liner
Javascript\n/**\n * @param {string[]} emails\n * @return {number}\n */\nvar numUniqueEmails = emails => new Set(emails.map(email => `${email.split(\'@\')[0].spl
```Javascript\n/**\n * @param {string[]} emails\n * @return {number}\n */\nvar numUniqueEmails = emails => new Set(emails.map(email => `${email.split(\'@\')[0].split(\'+\')[0].split(\'.\').join(\'\')}@${email.split(\'@\')[1]}`)).size\n```
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