node.js - nodejs怎么同步从一个数据库查询函数中返回一个值？

我想把从数据库中查询得到的值储存到一个变量中然后打印出来，但数据库查询是异步的，打印函数总是先一步调用，查询函数后一步调用，打印出来的值是空的。下面是代码。 {代码...} 下面是输出结果： jjjj 这是@2co...

From [Node.jsdiscussion group] 2017-04-17 11:31:33 0  3  847

node.js - How to best communicate with each other between http service and tcp service?

The project has a web background. The operations in the background issue instructions for the settings of the ...

From [Node.jsdiscussion group] 2017-05-16 13:38:05 0  4  846

node.js - I want to request an interface using superagent

I want to use superagent to request this interface http://hq.sinajs.cn/list=sh600138. How can I output the ret...

From [Node.jsdiscussion group] 2017-06-19 09:07:53 0  1  845

javascript - How to read files in koa

I am new to Koa. I use ctx in app.use to directly return the HTML string and it can be displayed. However, whe...

From [Node.jsdiscussion group] 2017-05-16 13:36:38 0  2  844

node.js - 求问nw.js开发桌面版，其js计算性能如何？

1.现在我需要开发通用平台（mac,windows)的桌面程序，但是程序需要涉及到前端大文件(百兆左右）加密功能。我们知道node.js做计算密集型性能是很差的，那nw.js计算性能是否也很差？

From [Node.jsdiscussion group] 2017-04-17 14:51:41 0  3  844

javascript - Jump between two pages, how to save the logo secretly

The problem is this, page A has a list of items. Page B is the base page of the item list on page A. Now I wan...

From [Node.jsdiscussion group] 2017-06-22 11:54:22 0  3  843

node.js - mongoose如何update某属性的ref

参见mongoose 两集合schema如下： {代码...} 当fans中的一个person取消了对story的喜好（fans的理解不知道对不对）那么story.fans是数组，可以delete掉该person的数据这...

From [Node.jsdiscussion group] 2017-04-17 16:07:58 0  2  843

node.js - 用node开发一电商网站，好不好，和php比较有什么利弊，求解答

用node开发一电商网站，好不好，和php比较有什么利弊，求解答

From [Node.jsdiscussion group] 2017-04-17 11:28:51 0  3  843

javascript - Google Chrome's support for es7's new feature array.prototype.includes

I heard that support has been rolled back, but why can I still execute this feature in the browser Google vers...

From [Node.jsdiscussion group] 2017-05-16 13:32:35 0  3  841

node.js - 前后端分离中避免暴露接口一般有那几种解决办法

来公司以前，项目都是前端写h5页面交给php做渲染的。目前想提高开发效率，想前后端分离，但是要求避免暴露接口或者说避免暴露post请求里的数据和一些关键数据。我不会php，查了几天的资料，找到的途径是用node做...

From [Node.jsdiscussion group] 2017-04-17 16:33:01 0  1  840

node.js - 同一域名下不同端口cookie共享问题

我有一个静态资源服务器(http://localhost:8080/)和一个后台接口服务器(http://localhost:3000/)，登录页面(http://localhost:8080/login.h...下有一...

From [Node.jsdiscussion group] 2017-04-17 15:05:54 0  2  840

node.js - socket.io 搭建了websocket，但是我用原生js却connect不上？

index.js {代码...} 结果： 这是连接代码：

From [Node.jsdiscussion group] 2017-04-17 14:52:22 0  2  840

Node.js爬虫如何处理JS动态生成的网页?

我现在只会处理静态的网页, 不知道JS动态生成的网页该如何处理, 比如用react.js之类生成的网页, 求大神赐教.

From [Node.jsdiscussion group] 2017-04-17 14:45:07 0  2  839

javascript - the most basic form validation in angular

In angular, ng-controller will form a scope. When using form form, it will form a scope of formController. Whe...

From [Node.jsdiscussion group] 2017-06-29 10:09:31 0  1  837

node.js - npm script parameters

{Code...} The above code is just an example. What I want to ask is what does the parameter passed later mean r...

From [Node.jsdiscussion group] 2017-06-08 11:02:34 0  1  837