JavaScript Solution
\nvar numUniqueEmails = function(emails) {\n    const set = new Set()\n    \n    for (let email of emails) {\n        const address = normalizeEmail(email)\n   
```\nvar numUniqueEmails = function(emails) {\n    const set = new Set()\n    \n    for (let email of emails) {\n        const address = normalizeEmail(email)\n        set.add(address)\n    }\n    \n    return set.size\n};\n\nfunction normalizeEmail(email) {\n    let [local, domain] = email.split("@");\n    local = local.replace(/(\\.)|(\\+.*)/g, "")\n    return local + "@" + domain\n}\n```
['JavaScript']