你这代码里面大量语法错误，很多变量没有var ，而且没用；用的，

最下面一部分 promise.all 不是promise.call额。。。。

var http = require('http');
var cheerio = require('cheerio');
var Promise = require('bluebird');
var baseUrl = 'http://www.imooc.com/learn/';
var url = 'http://www.imooc.com/learn/348';
var videIds = [728, 637, 348, 259, 197, 134, 75];

function filterChapters(html) {
 var $ = cheerio.load(html),
  chapters = $('.chapter'),
        title = $('.hd .cleadrfix h2').text();
        number = $('.meta-value .js-learn-num').text();
 
  courseData = {
            title: title,
            number: number,
            videos : []
        }
 
 chapters.each(function (item) {
  var chapter = $(this),
   chapterTitle = chapter.find('strong').text(),
   videos = chapter.find('.video').children('li'),
   chapterData = {
    chapterTitle: chapterTitle,
    videos: []
   };
  videos.each(function (item) {
   var video = $(this).find('.J-media-item'),
    videoTitle = video.text(),
    id = video.attr('href').split('video/')[1];
   
   chapterData.videos.push({
    title: videoTitle,
    id: id
   });
  });
  
  courseData.videos.push(chapterData);
 });
 
 return courseData;
}

function printCourseInfo(coursesData) {
    coursesData.forEach(function(courseData)  {
        console.log(courseData.number + '人学过' + couresData.title + '\n');
    })
   
 coursesData.forEach(function (coursesData) {
        console.log('****' + courseData.title + '\n');
        courseData.videos.forEach(function(item) {
            var chapterTitle = item.chapterTitle;

            console.log(chapterTitle + '\n');
            item.videos.forEach(function (video) {
                console.log('   [' + video.id + ']' + video.title + '\n');
            });
        })
  
 });
}

function getPageAsync(url) {
    return new Promise(function(resolve,reject) {
        console.log('正在爬取' + url);
       
        http.get(url, function (res) {
            var html = '';
            res.on('data', function (data) {
                html += data;
            });
           
            res.on('end', function () {
               
                resolve(html);

               
            });
        }).on('error', function (e) {
           
            reject(e)
            console.log('获取课程数据出错');
        });
    })
}

var fetchCourseArray = [];
videIds.forEach(function(id) {
    fetchCourseArray.push(getPageAsync(baseUrl + id))
})

Promise
    .call(fetchCourseArray)
    .then(function(pages) {
        var coursesData = [];
   
   
        pages.forEach(function(html) {
            var courses = filterChapters(html);
            coursesData.push(courses);
        })
        coursesData.sort(function(a, b) {
            return a.number < b.number;
        })
       
        printCourseInfo(courseData);
    })