Mongoose functions

examples-naive.js

User.find({
    verified: false
}).exec(function (err, users) {
    var n = users.length;
    for (var i = 0; i < n; i++) {
        var user = users[i];
        sendEmail(user.email);
    }
})

examples-wise.js

User.find({
    verified: false
}).stream().on('data', function (user) {
    sendMail(user.email)
}).on('end', function () {
    console.log("sent mail to all users")
});