我已经在我的Raspberry Pi 2上安装了Raspbian,现在我正在尝试在其上安装node.js,但是我遇到了一个问题.
我按照说明将这些命令输入终端
wget http://node-arm.herokuapp.com/node_latest_armhf.deb
sudo dpkg -i node_latest_armhf.deb
但是当我检查节点的版本时使用
node -v
我收到此错误:
node: /usr/lib/arm-linux-gnueabihf/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by node)
node: /lib/arm-linus-gnueabihf/libc.so.6: version `GLIBC_2.16' not found (required by node)
我是使用覆盆子pi的新手,所以解决这个问题的任何帮助都会很棒!
我在尝试使用Node.js,Express和angular重定向POST请求时遇到问题.我知道有一种使用表格的标准方法如下:
index.ejs
<!DOCTYPE html>
<html>
<head>
<title>Redirect Example</title>
</head>
<body>
<p>INDEX PAGE</p>
<form action="/redirect" method="post">
<button type="submit">CLICK</button>
</form>
</body>
</html>
test.ejs
<!DOCTYPE html>
<html>
<head>
<title>Redirect Example</title>
</head>
<body>
<p>YAY REDIRECTED</p>
</body>
</html>
app.js
var fs = require('fs');
var https = require('https');
var express = require('express');
var bodyParser = require('body-parser');
var cookieParser = require('cookie-parser');
var app = express();
app.set('view engine', 'ejs');
app.get('/', function(req, res) {
res.render('index');
});
app.post('/redirect', function(req, res){
res.redirect('/test');
});
app.get('/test', function(req, res) {
res.render('test');
});
var port …我在尝试使用 React 渲染 HTMLDivElement 时遇到了这个问题，但是出现以下错误：
Uncaught Invariant Violation: Objects are not valid as a React child (found: [object HTMLDivElement]). If you meant to render a collection of children, use an array instead or wrap the object using createFragment(object) from the React add-ons. Check the render method of `VirtualList`
在我的 React Component 类中，我有这段代码......
import React, { Component } from 'react';
export default class VirtualList extends Component {
constructor(props) {
super(props);
this.container = document.createElement('div');
}
renderList() {
let container = this.container;
// …用例是我想"毫不费力地"将某些prop值传递给所有后代组件.不确定这在React中是否可行.
所以不要这样做:
class Parent extends Component {
constructor() {
super(props);
this.props.componentID = "123456";
}
render() {
return <Child1 componentID={this.props.componentID} />
}
}
class Child1 extends Component {
render() {
return <Child2 componentID={this.props.componentID} />
}
}
class Child2 extends Component {
render() {
return <div>{this.props.componentID}</div>
}
}
做这样的事情:
class Parent extends Component {
constructor() {
this.props.componentID = "123456";
}
passComponentIDToAllDescendantComponents() {
// Some super nifty code
}
render() {
return <Child1 />
}
}
// etc...
谢谢您的帮助