我的导出代码
//export.js
var express = require('express'),
fs = require('fs'),
request = require('request'),
cheerio = require('cheerio'),
app = express();
var episode = [],
title = [],
synopsis = [],
reviews = [],
date = [];
exports.showGrab = function(url,response){
request(url,response, function(error, response, html){
var $ = cheerio.load(html),
shows = {bitten:['http://www.tv.com/shows/bitten-2013/episodes/']};
$('.no_toggle._clearfix').eq(1).filter(function(){
var data = $(this);
episode = data.children().first().children().last().text();
exports.episode = episode;
})
})
}
console.log(episode); // => defined as [] not the value given in the function
//import.js
var express = require('express'),
fs = require('fs'),
request = require('request'),
cheerio = require('cheerio'),
app = express(),
server = require('./export');
console.log(server.episode);
server.showGrab('http://www.tv.com/shows/bitten-2013/episodes/');
使用函数server.showGrab
在导入脚本中的工作正常但我需要访问导入脚本中show grab函数中的变量。我相信这个问题可以归结为一个范围问题,如果我在一个函数之外导出变量它们工作正常,但我的印象是,按照我的方式声明变量会使它们成为全局变量。如何在导入脚本中运行此功能,同时仍然传递一个网址并返回episode
进行处理?
答案 0 :(得分:0)
@Pointy你是对的,导入脚本在定义之前调用了值
//import.js
if (server.episode === undefined){
var test = setInterval(function(){
if (server.episode != undefined){
clearInterval(test);
}
console.log(server.episode);
}, 1000);
}
这就是诀窍,因为某些原因使用else而不是将if包装在if中不起作用。