use static resourceL: const express = require('express'); const app = express(); app.use(express.static('public')); app.listen(, () => console.log('Example app listening on port 3000!')); result :…

概述 这是我安装并运行express的三个坑,应该是比较常见的,在此记录一下. 内容 express不是内部或外部命令 输入命令:express -V 报错:'express' 不是内部或外部命令,也不是可运行的程序或批处理文件. 解决方法: 最新express4.0版本中将命令工具分家出来了,所以我们还需要安装一个命令工具,命令是:npm install -g express-generator.如果在AppData\Roaming\npm目录下生成了express.express.cmd两个…

Java Learning Path(三)过程篇 每个人的学习方法是不同的,一个人的方法不见得适合另一个人,我只能是谈自己的学习方法.因为我学习Java是完全自学的,从来没有问过别人,所以学习的过程基本上完全是自己摸索出来的.我也不知道这种方法是否是比较好的方法,只能给大家提供一点参考了. 学习Java的第一步是安装好JDK,写一个Hello World,? 其实JDK的学习没有那么简单,关于JDK有两个问题是很容易一直困扰Java程序员的地方:一个是CLASSPATH的问题,其实从原理上来说,…

learning express error handle code: const express = require('express'); const app = express(); const fs = require('fs'); app.get('/', function (req, res, next){ fs.readFile('file', function (err, data) { if(err){ next(err) }else{ res.send(data); } })…

learning express error handle code: const express = require('express'); const app = express(); app.get('/', function (req, res){ throw new Error("BROKEN"); }); app.listen(); result:…

learning express view engine function const express = require('express'); const app = express(); app.set('views','./views'); app.set('view engine', 'pug'); app.get('/', function(req, res){ res.render('index',{title: 'hey', message: 'hello panzidong u…

learning express.Router() code: const express = require('express'); const app = express(); var router = express.Router(); var cookieParser = require('cookie-parser'); app.use(cookieParser()); router.use(function (req, res, next) { //if (!req.headers[…

learning  express  middleware var express = require('express'); var app = express(); var myLogger = function (req, res, next) { log++; console.log('var log =', log); next(); }; app.use(myLogger); app.get('/', function(req, res){ res.send("hello world…

learning express route function const express = require('express'); const app = express(); app.get('/', function (req, res) { res.send('root'); }); app.get('/about', function (req, res) { res.send('about'); }); app.get('/random.txt',function (req, re…

Planar data classification with a hidden layer Welcome to the second programming exercise of the deep learning specialization. In this notebook you will generate red and blue points to form a flower. You will then fit a neural network to correctly cl…