var 內的函數作用域

Question

我正在嘗試訪問函數 createLocalAccount 中的變量 email 和 password，我該如何維護代碼結構？

var createLocalAccount = function(response) {
    return localDb.put('login', {
        uid: response.uid,
        email: email,
        password: password
    });
};

this.createAccount = function(firstName, lastName, email, password) {
    var deferred = $q.defer();
    createAccount(email, password)
        .then(createLocalAccount);
    return deferred.promise;
}

Answer 1

將其傳遞給函數：

var createLocalAccount = function(email, password, response) {
    return localDb.put('login', {
        uid: response.uid,
        email: email,
        password: password
    });
};

this.createAccount = function(firstName, lastName, email, password) {
    return createAccount(email, password)
        .then(function(response) {
            return createLocalAccount(email, password, response);
        });
}