老师，我用的是苹果本，这个文件字节输出流的写法是不是和老师写的喝个不太一样啊

这三个目录是哪来的呀，配置文件里面没有看到啊，还是说没配置的就会按原本的默认

有点不是很理解这两个的区别，在官网上下载解压后的这个nginx-1.20.2不可以直接用吗，为什么要配置参数后重新生成，而且生成的文件只有四个

yum和wget分别用在什么情况呢

老师 ，为啥又换课程了？？

老师 这一小章似乎没有文档

这里面css语法包括子元素选取，兄弟元素选取，父节点选取都可以用吗？

为啥treeset有打印这么多

CSS选择器获取元素是获得一个？？？

const express = require("express")
const router = express.Router()
const sqlFn = require("../mysql")

router.post('/add',function(req,res,next){
    const sql = "incert into menu values (null,?,?,?,?,?,?)"
    const {pid =-1,name,linkUrl,openType,icon,isAdmin} = req.body;
    const arr = [pid,name,linkUrl,openType,icon,isAdmin]
    sqlFn(sql,arr,function(err,data){
        if(err){
            next(err)
            return
        }
        if(data.affectedRows){
            res.send({code:'00000',success:true})
        }
    })
})

module.exports = router

const express = require("express");
const app = express();
const menu = require("./routes/menu")
const bodyParser = require("body-parser")


app.use(bodyParser.json())
app.use("/api/menu",menu)


app.use(function(err,req,res,next){
    console.info(err.stack);
    res.status("500").send("服务端出错了")
})

app.listen("3030",function(){
    console.log("服务器运行在3030端口上");
})

我可以用set嘛，这样直接是不重复的

print("helloworld")

a = 123

print(a)

为什么我点击换页这个下拉菜单就会自动闭合

import React, { Component } from 'react'
import { Modal, Form, Input, Select, Radio, Dropdown, Space,Pagination } from 'antd'
import { icons } from '../../../components'



export default class ModleForm extends Component {
    constructor(props){
        super(props);
        this.state={
            currentIcons:icons.slice(0,10)
        }
    }
    formRef = React.createRef();
    onCancel = () => {
        this.props.dispatch({
            type: "hideModleForm"
        })
    }

    onSave = (values) => {
        console.log(values);
    }
    layout = {
        labelCol: { span: 4 },
        wrapperCol: { span: 20 }
    }
    render() {
        return (
            <Modal visible width={600} title={this.props.title}
                onCancel={this.onCancel}
                onOk={() => this.formRef.current.submit()}
            >
                <Form {...this.layout} ref={this.formRef} onFinish={this.onSave}>
                    <Form.Item label="父菜单">
                        {"无"}
                    </Form.Item>
                    <Form.Item label="菜单名称" name="name" rules={[{ required: true }]}>
                        <Input></Input>
                    </Form.Item>
                    <Form.Item label="访问路径" name="linkUrl" rules={[{ required: true }]}>
                        <Input></Input>
                    </Form.Item>
                    <Form.Item label="打开方式" name="openType" rules={[{ required: true }]}>
                        <Select>
                            <Select.Option value="1">当前窗口</Select.Option>
                            <Select.Option value="2">新窗口</Select.Option>
                        </Select>
                    </Form.Item>
                    <Form.Item label="图标" name="icon" rules={[{ required: true }]}>
                        <Dropdown trigger={['click']}
                            overlayStyle={{background:"#fff",padding:10}}
                            overlay={
                                <>
                                    <Radio.Group>
                                        <Space direction='vertical'>
                                            {this.state.currentIcons.map((ele, index) => {
                                                return (<Radio value={ele.name} >
                                                    {React.createElement(ele.renderFn)}
                                                    <span style={{ margin: 5 }} key={index}>{ele.name}</span>
                                                </Radio>)
                                            })}
                                        </Space>
                                    </Radio.Group>
                                    <div style={{textAlign:"right",padding:10}}>
                                        <Pagination showSizeChanger={false} 
                                        size="small" 
                                        total={icons.length}
                                        onChange={(page,pageSize)=>{
                                            this.setState({
                                                currentIcons:icons.slice(pageSize*(page-1),pageSize*page)
                                            })
                                        }}
                                        ></Pagination>
                                    </div>
                                </>
                            }>
                            <Input></Input>
                        </Dropdown>
                    </Form.Item>
                    <Form.Item label="权限" name="isOfAdmin" rules={[{ required: true }]}>
                        <Radio.Group>
                            <Radio value="1">仅超管可见</Radio>
                            <Radio value="2">不限</Radio>
                        </Radio.Group>
                    </Form.Item>
                    <Form.Item label="菜单名称" name="name" rules={[{ required: true }]}>
                        <Input></Input>
                    </Form.Item>
                </Form>
            </Modal>
        )
    }
}