getEmail() {
let emails = [];
let result = new Promise( (resolve, reject) => {
this.start();
this.db.query('SELECT * FROM contacts', (err, res) => {
if (!!err) {
return console.log('Error in the Query');
} else {
res.forEach(function (item, i) {
if ((item.email !== '') && (item.email !== null)) {
emails.push(item.email);
}
});
resolve( emails );
}
});
});
result.then( (result) => {
this.end();
console.log('i Work! And I return Result! But i last.....');
return result;
});
}let promise = new Promise( (resolve,reject) => {
let result = _db.getEmail();
resolve(result);
});
promise.then( (result) => console.log(result) );undefined
i Work! And I return Result! But i last.....
getEmail() {
return new Promise((resolve, reject) => {
this.start();
this.db.query('SELECT * FROM contacts', (err, contacts) => {
if (err) {
reject(err);
return;
}
const emails = contacts
.map(contact => contact.email)
.filter(Boolean);
this.end();
resolve(emails);
});
});
}_db.getEmail()
.then((emails) => {
console.log(emails)
})
.catch((error) => {
console.log('Error in the Query', error);
});_getEmail() {
const emails = [];
return new Promise((resolve, reject) => {
this.start();
this.db.query('SELECT * FROM contacts', (err, res) => {
if (!!err) {
return reject('Error in the Query');
} else {
res.forEach(function (item, i) {
if ((item.email !== '') && (item.email !== null)) {
emails.push(item.email);
}
});
this.end();
return resolve(emails);
}
});
});
}
async getEmail(){
try {
const emails = await this._getEmail();
} catch (error) {
console.log(error);
};
}
Простой
Простой
