async和nodes js函數console.log接收NaN，NaN，Nan需要幫助將字符串輸出爲字符串而不是數字

Question

完整的代碼和錯誤我得到下面我真的很想讓輸出正常工作所以我可以在我的代碼在移動

var app = require('express')() 
      , server = require('http').createServer(app) 
      , fs = require('fs') 
      , exec = require('child_process').exec 
      , io = require('socket.io').listen(server); 

var async = require('async'); 

server.listen(process.env.PORT); 

app.get('/', function (req, res) { 
    res.sendfile(__dirname + '/client/index.html'); 
    // console.log(async); 
}); 

io.sockets.on('connection', function (socket) { 
    //socket.emit('dinpu', { hello: 'world' }); 
    // myModule('fam@btin.com:asdfef'); 
    socket.on('dout', function (data) { 
    //module2(data); 
    //console.log(JSON.parse(data.message)); 
    for(i = 0; i < data.message.length; i++) { 
     //data.message[i] = data.message[i].replace(/"/g, ""); 
    } 
    module1(data.message); 
    module2(data.message); 

    function module1(data) { 
     console.log(data); 
    } 


    function async(arg, callback) { 
     console.log('do something with \''+arg+'\', return 1 sec later'); 
     setTimeout(function() { callback(arg * 2); }, 1000); 
    } 

    function module2(data) { 
     function final() { console.log('Done', results); } 
     var items = data; 
     var results = []; 
     function series(item) { 
      if(item) { 
       async(item, function(result) { 
        results.push(result); 
        return series(items.shift()); 
       }); 
      } else { 
       return final(); 
      } 
     } 
     series(items.shift()); 
    } 


}); 
}); 

一切工作正常，除了這部分

function final() { console.log('Done', results); } 

我得到的結果

do something with 'dfhfgh', return 1 sec later 
do something with 'gfhjghj', return 1 sec later 
do something with 'gfhjghj', return 1 sec later 
do something with 'fghjgh', return 1 sec later 
do something with 'ghjfhj', return 1 sec later 
Done [ NaN, NaN, NaN, NaN, NaN ]<<< this is the error I need it to output the strings 

任何幫助修復我的代碼我真的很感激它:)。

我已經在這之後沒有了許多有益的意見已經得到解決我仔細一看後，我設法得到這個工作

所以糾正我的節點服務器之後，我現在得到繼承人正確的結果正確的代碼和結果如下

var app = require('express')() 
, server = require('http').createServer(app) 
, fs = require('fs') 
, exec = require('child_process').exec 
, io = require('socket.io').listen(server); 
var async = require('async'); 
server.listen(process.env.PORT); 

app.get('/', function (req, res) { 
res.sendfile(__dirname + '/client/index.html'); 
// console.log(async); 
}); 

io.sockets.on('connection', function (socket) { 
    //socket.emit('dinpu', { hello: 'world' }); 
// myModule('fam@btin.com:asdfef'); 
socket.on('dout', function (data) { 
//module2(data); 
//console.log(JSON.parse(data.message)); 
for(i = 0; i < data.message.length; i++) { 
//data.message[i] = data.message[i].replace(/"/g, ""); 

} 
module1(data.message); 
module2(data.message); 

function module1(data) { 
    console.log(data); 
} 


function async(arg, callback) { 
    console.log('do something with \''+arg+'\' return 1 sec later'); 
    setTimeout(function() { callback('\''+arg+'\''); }, 1000); 
} 

    function module2(data) { 
    function final() { console.log('Done', '\''+results+'\''); } 
    var items = data; 
    var results = []; 
    function series(item) { 
         if(item) { 
     async(item, function(result) { 
       results.push(result); 
       return series(items.shift()); 
      }); 
     } else { 
      return final(); 
     } 
    } 
    series(items.shift()); 
} 


}); 
}); 

結果

do something with 'sdfg' return 1 sec later 
do something with 'srg' return 1 sec later 
do something with 'sdf' return 1 sec later 
Done ''sdfg','srg','sdf'' 

Answer 1

setTimeout(function() { callback(arg * 2); }, 1000);

這一行，arg不是一個數字，你不能使用* 2