Javascript（节点）错误：意外的令牌功能

Question

I am trying the learn younode workshop, the make it modular step to be precise. I wrote the code in the link and am getting the "error in the title". I have checked brackets and parenthesis but can not seem to find where i got it wrong. Any help would be appreciated (i just started with node). My code is this and you can find it also at this link: http://pastebin.com/G8x2GH7h

module.exports = function (directoryPath, extention, function(error, arrayOfNames) {
        var fs = require('fs');
        var path = require('path');
        var FileNamesArray = [];
        fs.readdir(directoryPath,function (error,list){
                list.forEach(function (file) {
                        if (path.extname(file) === '.' + extention) {
                                FileNamesArray.push(file);
                        }
                });
        });
        return FileNamesArray;
        }){
        return ArrayOfNames;
}

Answer 1

您的问题是您要在函数声明中声明函数。

Answer 2

It should be like this

exports.functionName = function() {
  // your code
};

And then In you app.js you can use

var abc = require('path to file name');
abc.functionName();

example

// square.js
var PI = Math.PI;

exports.area = function (r) {
  return PI * r * r;
};

exports.circumference = function (r) {
  return 2 * PI * r;
};

// app.js
 var square = require("./square.js");

var mySquare = square(2);
console.log('The area of my square is ' + mySquare.area());

Remove the anonymous function inside your function and hopefully it should work for you.

Answer 3

You are missing the title of you function in the export section, should be in this way:

module.exports = {
getFileNamesList : function (directoryPath, extention, function(error, arrayOfNames) {
            var fs = require('fs');
            var path = require('path');
            var FileNamesArray = [];
            fs.readdir(directoryPath,function (error,list){
                    list.forEach(function (file) {
                            if (path.extname(file) === '.' + extention) {
                                    FileNamesArray.push(file);
                            }
                    });
            });
            return FileNamesArray;
            }){
            return ArrayOfNames;

        }
    }