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449 views

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class Test{ private static int i = 1; public static void main(String[] args){ Test test = new Test(); System.out.println(test.i); //此处为何能访问到私有的i变量呢？ } } 如果与Test类不同包，调用i变量却报错，为何？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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381 views

1 answer

error while downloading django channels in windows "NO MODULE FOUND"

error: command 'C:Program Files (x86)Microsoft Visual Studio2019BuildToolsVCToolsMSVC14.28.29333inHostX86x64cl.exe' failed with exit ... ' Check the logs for full command output....

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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322 views

1 answer

Using input, type conversion, a list with strings and for loop but cannot print horizontally?

I am trying to take a user input, iterate over each element of the input while converting it into an int, and using those ... ) I'm using could be an issue, please let me know....

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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456 views

1 answer

nvm use node失败

...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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317 views

1 answer

linux关于在命令行模式执行可执行文件的问题

我有个程序，打包出来，在gui模式下面，进入软件的目录，然后执行命令 ./test 可以看到控制台输出一些正常的信息，软件正常工作。但是到了命令行模式，再执行上述命令。控制台没有任何输出，什么事也没发生。这个何解？这种软件，是不是不能运行在命令行模式下面？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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506 views

1 answer

webpack react 热加载失败？

想用react写个小demo，结果webpack-dev-server不能热加载。执行webpack-dev-server后，修改app.js，命令行会变化、打包出来的js文件不会变化，浏览器没有什么反应。这是我的代码，https://github.com/Gema-uestc... 这会是什么原因呢？求告知～...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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373 views

1 answer

java - MVVM - how do I pass context to the repository class?

I'm trying to learn MVVM, and I faced some issue which I don't know how to resolve. I wanted to make a ... , Manifest.permission.ACCESS_COARSE_LOCATION }, 1); } } } } }...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

微信小程序 scroll-view滚动问题

用微信小程序做一个订单页的功能~效果是当用户点击按钮的时候弹出一个遮罩层~同时遮罩层上显示一个订单列表~超过容器部分则垂直滑动~现在遇到个问题是因为还木有appid~只能在开发者工具上测试~发现使用scroll-view时候内容只能通 ... -view内的内容就会动了~不知道是什么原因~还是说这只是开发者工具的问题~到时用真机的时候就不存在这个问题了...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

1 answer

html5 video播放视频卡死

如题，使用video标签播放摄像头的监控视频，过一阵画面就会出现很大的延迟，延迟好长时间或者直接卡住了，有没有大神知道怎么解决呀？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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239 views

1 answer

python - Api calls blocked from laptop to ElasticAppSearch engine

I am trying to make a post api request from my python code to ElasticAppSearch engine. I am using macOS Catalina (version ... known')) "" Any suggestions would be helpful. Thanks!...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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227 views

1 answer

python 3.x - pandas: groupby with multiple conditions

Would you, please help me, to group pandas dataframe by multiple conditions. Here is how I do it in SQL: with a as ( select high ,sum( ... '0','1','0','0','0'] Thank you very much!...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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796 views

1 answer

stream - Flutter streambuilder between screens

I'm new in Flutter and I implemented the bloc architecture with streambuilder. I created 2 pages with just a button which change ... , backgroundColor: Colors.green, )); }, ); } }...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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416 views

1 answer

python - Errno 8 Exec format error on Cloud Run Service with continuous deployment

I get the Exec format error when I set up continuous deployment on Cloud service. It's a Python app that executes binary ... useradd user && mkdir folder CMD ["python", "app.py"]...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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501 views

1 answer

javascript - How to make multiple post requests, that depends on the previous ones

I need to make 5 post request, and each post depends on the id of the previous post request. endpoint4 depends on the ... somedata2, attr4: somedata3, }, attr_5: somedata4, }) })...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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162 views

1 answer

html - how to apply a mask to an item coming from an API with Javascript

I have a basic CRUD situation, where in the form, when I send the data, it inserts the mask normally, and when sending it ... => s.json()) .then((dados) => exibirEmpresas(dados));...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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191 views

1 answer

关于window.onresize+rem布局的问题

1 现在做页面在用rem布局动态获得屏幕宽并根据不同宽度赋值整个页面不同的fontSize值使页面代码如下： 2 document.documentElement.style.fontSize = document.documentElement.clientWidth ... 需要刷新才可以解决现在不知道如何使用onresize 求大神解决横屏的问题 ...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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467 views

1 answer

fullpage.js的easing参数怎样配置自定义动画或者引入插件

...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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360 views

1 answer

jQuery实现多个div实现滚动固定到顶部

有多个div叫gou的当滚动条向下滚动的时候每一个gou依次固定到顶部，但是当向上滚动的时候触发条件判断不对怎么回事？代码： $(document).ready(function(){ //获取定位元素距离浏览器顶部的距离 //var ... z-index","0"); //else if 里面的条件判断不对应该怎么改啊 } }) }); });...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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532 views

1 answer

reactjs - fetch API in react native work fine on localhost but on EC2 instance, it is throws CORS Error

I have set up a proxy for Reactjs, it is working fine on the localhost I have added below in package.json "proxy ... can suggest changes in the Nginx file if any. Thanks in advance...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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420 views

1 answer

请问nodejs中npm start时显示找不到模块是什么原因？

我在node_module下新建了database文件夹，新建了两个文件，setting.js msession.js。然后在app.js中引用了这两个文件，但是npm start启动的时候就报错了，是怎么回事？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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164 views

1 answer

java - Eclipse remove error text from code lines

My Eclipse suddenly started showing error text within the code area as an additional line. I checked under Window ... is an update or me changing appearance settings previously....

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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338 views

1 answer

iconfont的字体为什么会偏下？

在引入了iconfont的图标字体后发现字体不是居中的，为什么会这样，怎样使得它能居中对齐？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

316 views

1 answer

python - combine rows in pandas after explode

I have collected the data from twitter. I have miltiple columns but have an issue with one of them: tweets_data[' ... the usernames or any alternative method o do what I want?...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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431 views

1 answer

javascript中forEach的一个奇怪问题

这是我无意间发现的一个问题，现在把问题简化为以下形式，上代码： <script type="text/javascript"> var person = { name:'Tom', age:24, sex:'man' } ['name','age'] ... ]); }); </script> 控制台居然正常输出了Tom和24：感觉挺奇怪的，谁能解释一下...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

165 views

1 answer

windows - Performance Monitor Graph

I've created an xml-file for the Performance Monitor. There are some Counters and I added an XML-Tag: " ... , counter etc. but no CounterDisplayName. Thanks for the help....

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

944 views

1 answer

weex for ios 图片不能显示，急！！！

帮忙看看是怎么回事！！安卓上没问题！苹果上不显示 http://dotwe.org/vue/5947bea5......

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

309 views

1 answer

liunx 安装mysqlnd扩展

php7.1.2编译安装后，安装mysqlnd扩展 ./configure 后 error：configure: error: Cannot find OpenSSL's <evp.h> openssl.i686 1.0.1e-48.el6_8.4 ... 了openssl openssl-devel 但是依然是报这个错误系统为 centos 6.5...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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249 views

1 answer

javascript - How do i trigger an onPress event on a screen render in react native?

Basically what i'm trying to do is to trigger the onpress event whenever i get on this screen, i know how to do this on ... ref? or props? i don't know, need a example if possible...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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