公司放映系统最近要上线一个『预定随机推荐电影』功能，每天用户_网易笔试题

小野市

若传递给 Promise.all() 的任意 Promise 被拒绝了，那么方法所返回的 Promise 就会立刻被拒绝，而不必等待其他的 Promise 结束。

Spread operator 将数组转为用逗号分隔的参数序列，Rest操作符和Spread操作都是用三个点（...）表示，但作用整好相反

发表于 2018-07-07 17:29:07 回复(0)

waitforuwen

function bookTodayMovieForTodayUser() {
    let u = new Promise((resolve, reject) => {
        getTodyUsers(userIds => {
            resolve(userIds)
        })
    })
    let m = new Promise((resolve, reject) => {
        getTodayMovie(movieId => {
            resolve(movieId)
        })
    })
    return Promise.all([u, p]).then((result) => {
        bookMovieForUsers(...result, resolve);
    })
}

编辑于 2018-07-07 00:52:20 回复(0)

菏妹

function bookMovieForUsers() {

var a = new Promise((resolve, reject) => {

getTodayUsers(userId => {

resolve(userId);

})

});

var b = new Promise((resolve, reject) => {

getTodayMovie(movieId => {

resolve(movieId);

})

});

Promise.all([a, b]).then(function(res) {

bookMovieForUsers(res[0], res[1], resolve);

})

}

发表于 2018-09-11 16:41:26 回复(0)

找呀找朋友

function bookTodayMovieForTodayUser(){
    return new Promise((resolve, reject) => {
        getTodayUsers(userIds => {
            resolve(userIds)
        })
    }).then(values => {
        return new Promise((resolve, reject) => {
            getTodayMovie(movieId => {
                resolve({userIds: values,movieId: movieId})
            })
        })
    }).then(values =>{
        return new Promise((resolve, reject) => {
            bookMovieForUsers(values.userIds, values.movieId, () => {
                              resolve("ok")
        })
    })
})
}

发表于 2020-08-07 11:48:43 回复(0)

你把你offer给我交了

function bookTodayMovieForTodayUser() {
  // step1
  let userIds = new Promise(function (resolve, reject) {
    getTodyUsers(userIds => {
      resolve(userIds)
    }
    )
  })
  //step2
  let movieIds = new Promise(function (resolve, reject) {
    getTodayMovie(movieId => {
      resolve(userIds)
    })
  })
  // step3——Promise.all()
  new Promise.all([userIds, movieIds]).then(function (results) {
    return new Promise(function (resolve, reject) {
      //  bookMovieForUsers(...results, function () {
      bookMovieForUsers(results[0], results[1], function () {
        resolve()
      })
    })
  })
}

发表于 2018-07-17 15:52:53 回复(0)

zanjsjfld

function bookTodayMovieForTodayUser() {
    return new Promise.all([
        new Promise(function(resolve, reject){
            getTodyUsers(userIds=>{ 
                if (userIds) {
                    console.log(userIds )
                    resolve(userIds)
                }}
            )
        }),
        new Promise(function(resolve, reject){
            getTodayMovie(movieId=>{ 
                if (userIds) {
                    console.log(userIds )
                    resolve(userIds)
                }
            })
        })
    ]).then(function(results){
        return new Promise(function(resolve, reject){
            bookMovieForUsers(results[0], results[1], function(){
                resolve()
            })
        })
    })
}

编辑于 2018-06-25 20:17:24 回复(0)

青柚_

请教各位，这样写可行吗，代码运行了不会输出“预定成功”

function bookTodayMovieForTodayUser() {

    let u = new Promise((resolve, reject) => {
                function getTodayUsers(userIds){
                    console.log(userIds);
                }
            });

    let m = new Promise((resolve, reject) => {
                function getTodayMovie(movieId){
                    console.log(movieId);
                }
            });

    Promise.all([u, m]).then(
        function bookMovieForUsers(result, resolve){
            console.log("预定成功");
        }
    );
}

发表于 2018-08-28 21:55:55 回复(0)

是函数不是方法

function bookTodayMovieForTodayUser() {
  let promise1 = new Promise(resolve => {
    resolve(getTodayUsers())
  })
  let promise2 = new Promise(resolve => {
    resolve(getTodayMovie())
  })
  return Promise.all([promise1,promise2]).then(results => {
    bookMovieForUsers(results, () => {
     resolve()
    })
  })
}
function getTodayUsers() {
  return [1,2,3]
}
function getTodayMovie(){
  return 1000
}
function bookMovieForUsers(results,callback){
  console.log(results[0],results[1],"预定成功了")
}
bookTodayMovieForTodayUser().then(() => console.log('预定成功'));

发表于 2018-06-21 15:38:17 回复(0)

北冥一鲲

function bookTodayMovieForTodayUser() { getTodayUsers(userIds => { getTodayMovie( movieId => {
      return new Promise((resolve, reject) => { bookMovieForUsers(userIds, movieId, () => {
            resolve();
         }) });
    }) }) }

发表于 2018-06-11 23:54:58 回复(0)

其实向宇自己一个桌

function bookTodayMovieForTodayUser() {

let promise1 = new Promise(resolve => {

getTodayMovie((movieId) => {

resolve(movieId);

})

});

let promise2 = new Promise(resolve => {

getTodayUsers((userIds) => {

resolve(userIds);

})

});

return Promise.all([p1, p2], (movieId, userIds) => {

bookMovieForUsers(userIds, movieId, () => {

resolve();

})

}

bookTodayMovieForTodayUser().then(() => console.log('预定成功'));

编辑于 2018-06-07 17:52:57 回复(0)

公司放映系统最近要上线一个『预定随机推荐电影』功能，每天用户

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