Question

我正在学习node.js.在cloud9上尝试一些演示。演示很简单，只有2个js文件。我逐行检查，一切似乎都很好。请帮我调试一下。

resource.js文件。

        var util = require('util');
        var EventEmitter = require('events').EventEmitter;

        function Resource(m){

            var maxEvents = m;
            var self = this;

            process.nextTick(function(){
                var count = 0;

                self.emit('start');
                var t = setInterval(function(){
                    self.emit('data', ++count);

                    if(count === maxEvents){
                        self.emit('end', count);
                        clearInterval(t);
                    }
                }, 10);
            });

        };

        util.inherits(Resource, EventEmitter);

7-extEmitter.js

        var Resource = require('./resource');


        var r = new Resource(7);


        r.on('start', function(){
            console.log("I've started!");
        });

        r.on('data', function(d){
            console.log("    I received data -> " + d);
        });

        r.on('end', function(t){
            console.log("I'm done, with " + t + " data events.");
        });

这是我收到的错误消息：

            Your code is running at 'http://node.myw714.c9.io'.
            Important: use 'process.env.PORT' as the port and 'process.env.IP' as the host in your scripts!
            /var/lib/stickshift/511e07b5500446f25c0001bd/app-root/data/407149/7-extEmitter.js:4
            var r = new Resource(7);

              ^
            TypeError: object is not a function
                at Object. (/var/lib/stickshift/511e07b5500446f25c0001bd/app-root/data/407149/7-extEmitter.js:4:9)
                at Module._compile (module.js:449:26)
                at Object.Module._extensions..js (module.js:467:10)
                at Module.load (module.js:356:32)
                at Function.Module._load (module.js:312:12)
                at Module.runMain (module.js:492:10)
                at process.startup.processNextTick.process._tickCallback (node.js:244:9)

Answer 1

您只需要删除该初始化代码。

    var r = require('./resource');


    r.on('start', function(){
        console.log("I've started!");
    });

    r.on('data', function(d){
        console.log("    I received data -> " + d);
    });

    r.on('end', function(t){
        console.log("I'm done, with " + t + " data events.");
    });

并在resource.js中添加此行，如果您希望它更通用，则应更改函数结构以允许设置值m。

module.exports = new Resource(7);

Answer 2

在resource.js文件中的utils.inherit下，您只需要添加：

module.exports = Resource;

剩下的代码很好。

node.js，需要帮助来修复这个bug＆＃34; TypeError：object不是一个函数＆＃34;

2 个答案: