Question

有没有办法为Promisee.all中的每个结果分配名称？

我们说这是我的代码：

Promise.all([getBalls, getKids, getTeams])
.then(function (results) {
    const new_team = doSomething(results[0], results[1],results[2])
    resolve(new_team);
});

我希望它像：

Promise.all([
    balls: getBalls,
    kids: getKids,
    teams: getTeams
]).then(function (results) {
    const new_team = doSomething(balls,kids,teams)
    resolve(new_team);
});

Answer 1

您可以在function isValid(value) { return value != undefined; } var arr = [12, undefined, "blabla", ,true, 44]; var filtered = arr.filter(isValid); console.log(filtered); // [12, "blabla", true, 44]回调函数中使用ES2015的Array destructuring：

.then

Answer 2

在最近的node.js（＆gt; node v6.x）版本中，您可以使用解构并执行

Promise.all([getBalls, getKids, getTeams])
.then(function ([balls, kids, teams]) {
    const new_team = doSomething(results[0], results[1],results[2])
    resolve(new_team);
});

Answer 3

也许Promise.props看起来更容易使用。 http://bluebirdjs.com/docs/api/promise.props.html

 Promise.props({
   balls: getBalls,
   kids: getKids,
   teams: getTeams
 })
 .then((results) => {
   const new_team = doSomething(results.balls, results.kids, results.teams)
   resolve(new_team);
 });

Node JS Promise.all（）结果命名

3 个答案: