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570 views

1 answer

请问flutter有类似dlopen动态加载dart库的功能吗？

我的目的就是说通过类似oc中的 dlopen(path) 这样的方法，加载dart的库，做到同等 import x.dart 的效果，请问有这样的方法吗？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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700 views

1 answer

js录屏生成的视频能播放，但下载后播放不了

这个demo的代码来自简书 /* * @Author: Shawbs * @LastEditors: Shawbs * @Date: 2020-07-03 11:01:22 * @LastEditTime: 2020-07-29 17: ... </html> 代码已经发到codepen了 https://codepen.io/shawbs/pen......

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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256 views

1 answer

C++中引用传递和对象传递的区别是什么？

引用传递和对象传递的区别是什么？ void goodGay(Building &building){ } void goodGay(Building building){ }...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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606 views

1 answer

微信支付 + redis + 商品超卖问题

微信小程序中的商品存在超卖问题? 原方案: 用户调起微信支付->输入支付密码->服务器验证支付成功->扣减库存场景1: 用户调起微信支付模态框(长时间停留页面,并不输入支付密码) 场景2: 前面输入支付密码后还未验证支付是否成功,这 ... 有什么更好的方案防止超卖? 交流一下我觉得重点是尽量让用户付款后可以有库存扣减 -> 如果没有实时反馈->阻断支付...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

611 views

1 answer

无法启动gateway模块，报bind(..) failed: Permission denied

问题描述无法启动gateway模块问题出现的环境背景及自己尝试过哪些方法 Ubuntu 20.04 LTS 安装idea最新版，2020.2，JDK使用的是直接在ide里面下载的adopt-openjdk-1. ... :1.8.0_262] at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_262]...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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409 views

1 answer

navcat通过ssh 密钥形式连接不上mysql？

前提条件：本机正常通过ssh key形式连上远程服务器。其他工具也可以通过密钥形式连上，就是navcat不行。 navcat 建立ssh通道，用用户名密码形式可以连接，但是用密钥文件形式连不上远程服务器。...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

384 views

1 answer

关于三次握手的一些问题

在网上看到了一面试题：输入一个网站后发生了什么，想问一下关于传输层的三次握手的问题：（1）浏览器通过HTTP解析URL生成请求报文是在三次握手之后还是在其之前？（2）三次握手里ACK，SYN，序号Seq包的传输也是按照：客户端传输层-> ... 换数据了，这里说的数据是指单单指的是TCP 报文段吗？还是说逐层往下最后封装成的数据帧？还是说是其他的东西？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

278 views

1 answer

sql语句，在TP里不会拼接了。。。LEFT JOIN 加 and

我是需要这样的， SELECT b.NAME province, c.NAME addressCity, d.NAME cityCode, `a`.`realName`, `a`.`address`, `a`.`phone`, `a`.`remark` ... `cityCode` = `d`.`code` and `d`.`type` = 3 tp要怎么写...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

523 views

1 answer

svg图片背景色渐变动画怎么实现？

<?xml version="1.0" standalone="no"?> <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11. ... 片，默认颜色是 #FE6A00，请问怎么修改可以让他背景颜色一闪一闪的效果？谢谢了...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

356 views

1 answer

reactjs - Typescript React Target container is not a DOM element

I have an addin for outlook, which is complaining: Uncaught Invariant Violation: Target container is not a DOM element. ... be rendered? Which DOM element might be the issue?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

435 views

1 answer

Android Studio 4.0 Terminal窗口中文乱码

如图所示（AS 4.0），终端窗口中文显示乱码，（Win10 Pro v1909）只用AS中的终端窗口会有乱码现象，系统默认CMD窗口中文显示正常，电脑上还有IDEA，IDEA中的终端中文显示也是正常的，在网上看到很多都是使用git时 ... 我这个是点击那个Terminal后打开的窗口中的中文直接就是乱码，正常终端窗口的中文显示（IDEA中）（下图）...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

251 views

1 answer

怎样从controller中的入参获取注解所需要的值？

求解答，如何从controller中的入参获取注解所需要的值，例子如下：我的log注解接口参数中有两个方法，需要获取到从controller中穿过来的deviceID和DeviceType这两个值，现在注解中取不到这两个入参值，我应该怎么做？求解...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

794 views

1 answer

如何在web端录制系统音频（扬声器音频）。

需求获取到系统当前正在播放的声音限制 web端，而非electron（electron提供了解决方案）；跨浏览器，不能是某浏览器独有的；有别于直接访问麦克风，麦克风收录的音频不一定是系统播放的音 ... 着耳机呢；目前想到的思路卡在了getUserMedia，getUserMedia的audio不能直接访问系统音频求教大家，一起讨论，THX ...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

170 views

1 answer

How to do load testing for a flutter based application hosted on firebase which is not using API

My application uses flutter and firebase The app directly communicate with the DB , there is no api involved How do i do ... 1000 users using app and doing some action in the app...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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131 views

1 answer

java - How To Separate Class Holding Records from Classes That Use It?

I'm creating a console-based game and I'm having trouble deciding on how to properly structure my classes. Say I have the ... matter). Any advice on a better way to go about this?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

171 views

1 answer

请问js怎么去除name中，头和尾的[]

var name ="[2,3,4,5,6,7,8]";...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

515 views

1 answer

vue项目启动后，localhost这个页面加载了很长时间

此项目做了ssr，用的是Vapper 之前一直好好的，隔了几个月后，今天本地运行发现了此问题几番搜索后无果。。。...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

593 views

1 answer

electron-vue，启动之后没了样式和图片是什么原因呢，请大佬帮忙康康

ui用的iview， import Vue from 'vue' import axios from 'axios' import App from './App' import router from './router' import store from './ ... ": "^2.22.2", "webpack-merge": "^5.0.9",...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

414 views

1 answer

Vue $emit 定义事件什么时候失效？

比如我在A组件中$emit("a")声明事件a 然后再 B组件中监听这个事件名 created() { $bus.$on("a",function{ this.findAll(); }); }, 如果我在 C 组件中又监听了这个事件，是否能监听得到这个 "a" 事件？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

372 views

1 answer

Typescript 类型检查的问题

相关链接：https://www.typescriptlang.org/play?#code/ ... -UGwxgK3GSBmtE+VyWtw+n2eIjg70eXx+-32ayAA...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

313 views

1 answer

jquery - sweetalert2 failed to call Confirm POST submit button in Laravel

In my Laravel-5.8, I have this post request which I want to confirm using Sweetalert2 < script type = "text/javascript ... ... did not appear. How do I resolve this? Thanks...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

347 views

1 answer

networking - Resolve Hostnames across networks

I have two networks running. One network is 192.168.0.0 the other is 192.168.1.0. In the 0.0 network I have ... to do in oder to be able to resolve hostnames from another network?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

536 views

1 answer

kubernetes - Namespace “stuck” as Terminating

I am getting issue while terminating the namesapce in the cluster, It's showing many parameters inside the namespace JSON. I followed ... " } ], "phase": "Terminating" } }```...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

290 views

1 answer

thinkphp无法使用UNIX_TIMESTAMP进行更新吗？

报错是这样的，如下图：【图片已删除】图中的打印出来的【SQL语句】在mysql直接执行是可以的，但是在thinkphp 控制器中通过query()执行这条语句就报上图的错，这是为啥呢？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

135 views

1 answer

NGINX automatically redirects subdomain to domain

So I know this seems like a question many people have asked before but I wasn't able to find an answer yet so I'll ... to my DNS settings and set the website to those it works too....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.2k views

1 answer

如何在 package.json scripts 里使用 .env 的环境变量？

有多个fork的项目，只是 --port 不一样，如： "scripts": { // 项目1 "android": "react-native run-android --port=8081", // 项目2 // "android": " ... .env port = 8082 项目3： // .env port = 8083 请问如何做到这种效果呢？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

223 views

1 answer

Transferring Google Charts Data to PostgreSQL via script

Hello I am trying to think of/find a way to transfer data from a Google chart to a PostgreSQL database. The way ... this? And is this even achievable with the script editor alone?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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278 views

1 answer

python - Strange result when removing item from a list while iterating over it

I've got this piece of code: numbers = range(1, 50) for i in numbers: if i < 20: numbers.remove(i) print( ... in the results. Looks like I'm doing something wrong with the remove....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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