Recent questions in Technique[技术]

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Hello vue报错Property or method "message" is not defined

报错信息 instance but referenced during render. Make sure to declare reactive data properties in the data option. (found in <App> ... files will be auto injected --> </body> </html>...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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background process - How to take action based on detection of locked or off screen in flutter app

By using a flutter package from pub.dev named "torch_compat 1.0.2" for turning on/off flashlight in android app, how to ... Colors.deepOrangeAccent : Colors.white10, ), ), ); } }...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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354 views

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Resolving this issue with Passenger

http://nodejs-resume.developmentserver.me/ When the site loads, /usr/local/dh/passenger/helper-scripts/node-loader.js:37 GLOBAL. ... node 15.5.0 I am hosting with Dream Host VPS...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - how to import variable from a different js file?

I've been looking into the ES6 docs about import and export. It's pretty straightforward yet I can't get it to ... mapboxtoken;//use mapboxtoken variable here //rest of code... }...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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639 views

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为什么ORM框架(JAVA的Hibernate和Node.js的Sequelize) 都要有关係才能做join查询呢?

在使用Node.js的Sequelize ORM框架时，如果在查询时加上included表示要做join查询例如 db.User.findAll({ include: [{ model: db.Message, required: true }] }) .then(( ... 请问他们这样设计的原因为何? 有什麽替代方桉可以做无关係的join查询吗?...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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greenplum 给数据创建索引报错 invalid memory alloc request xxx

greenplum中给27亿条结构化数据创建索引，create index idx_gp1C1 on gp_1(C1); 报错如下：ERROR： invalid memory alloc request 1182583872 (context 'TupleSort') (mcxt.c: ... 多，尝试过修改不同参数了，请问这个问题有没有什么解决方法？...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Restoring sqlite.db file after downloading it from gmail

I need some help i am working on backup and restoring sqlite.db file , In this process i store a copy of db file in ... file please help me out i am stuck here ,Thanks in advance...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Graphviz: create non overlapping edges from a struct to itself

I am trying to recreate in graphviz a diagram similar to the one taken from the CLR book: I am using the ... SVG myself, of course) or use a different approach altogether?...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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205 views

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计算密集型和IO密集型

请问为什么到底什么样的业务是计算密集型，什么样的业务是IO密集型？为什么说PHP最初设计是针对计算机密集型的，node.js是针对IO密集型的？...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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282 views

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scichart - flippedCoordinates rotated chart pointMarker showing wrong place

enter image description here Points are not plotted correct on the scichart xAxis.axisAlignment = EAxisAlignment.Left; xAxis. ... "blue", strokeThickness: 1, }); });...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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php - Assemble menu (tree of nodes), where only parent is known

I have a menu navigation, like this: - Page 1 - Page 2 - Subpage A - Subpage B - Subpage C - Page 3 - Subpage D - ... code die(); } return $final_tree; } This works, but it's ugly....

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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后端渲染和前端渲染哪个快？

感觉是后端吧？...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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399 views

1 answer

python怎么捕捉日志文件里面的UA

日志格式如下 `61.182.137.6 - - [21/Apr/2017:00:00:37 +0800] 0 "HEAD / HTTP/1.1" 200 - "-" "Baidu-YunGuanCe-SLABot(ce.baidu ... .com)"` python3.5用什么方式可以捕捉到UA里面的蜘蛛类型Baiduspider和DotBot 要怎么写...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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582 views

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js为什么不是按着载入的顺序依次执行

我用的 code prettify 源码高亮. 必须写在<pre>中才能高亮,而且<pre>必须要加入class="prettify" 于是我就用$("pre").attr("class","prettify");一次性在js中全部加了. 就不需要手写了. ... 和ie下都是先执行jq,第二步执行源码高亮的js.第三部执行我手写的js 不知道为什么会这样....

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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390 views

1 answer

为什么图片加载到浏览器端像素周围都模糊了呢？

做了一个图片 1000px*1000px，第一个像素有填充颜色，windows下放大后看正常前端请求到这个图片后，设置style：width:40000px;height:40000px;放大很多倍之后，像素周围很模糊我觉得无论怎么放大，呈现的应该始终是一个均匀有明显边界的颜色块啊有没有办法让图片在浏览器端放大后，也能完美的呈现每一个像素的内容呢？...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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579 views

1 answer

webpack-dev-server --port 现在不能直接运行了吗

以前直接到projectX目录运行 X:project> webpack-dev-server --port 8080 --host 127.0.0.1 这样可以很方便就打开服务器了:127.0.0.1:8080，并且列出了该目录下的所有文件现在却提示需要配 ... 配置文件然后打开服务器呢？或者配置文件应该怎么写呢？（并能把根目录下的目录和文件列出来）...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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199 views

1 answer

函数getByName()中如何使得co执行完后才return

express中判断用户登录（使用了sequelize和co）但是是return res之后才看到console.log中的信息。如何使得执行完co中的函数才return？...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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395 views

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react-router路由问题？

配置了webpack热更新，今天想实现路由功能，但是确报错了，说路由位置的哈希找不到。下面贴出我的配置和错误，望能解答！这是路由部分，然后调用了三个组件。这是热更新的部分。整体的流程如上图所示。但是确报错了。...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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解释一下vertical-align出现以下现象的原因吗？

<div class="coder"> <img src="images/code2.png" style="vertical-align:middle;"> <span>打开微信，扫描二维码,<br>用手机观看视频</span> </div> .coder{ width: ... 的解释，但是还是不理解，也百度过，还是不懂，可能需要一些通俗的解释才理解吧...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Spring WebFlux - Why I have to wait for WebClient response?

I have a my WebClient class as per below: public class WebClientSample { public static void main(String[] args) throws ... response. Why do I need to wait for the response?...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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216 views

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Can I update Google Form questions with a spreadsheet?

I have tons of Google Forms for a project and each one has the same sections and questions, just different choices ... spreadsheet and it'll update in every single form connected....

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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191 views

1 answer

node.js - How to check if Image file is really included in Request in expressjs

I am building an API using ExpressJS.In one of the endpoints I need to create an account with an optional avatar. So, I want to ... ; } else { console.log("No Avatar Found"); } },...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dataframe - R: Imputing NAs with random choice of female or male

I am working in R. I have a data frame column with female or male and some NAs. Now, I want to randomly ... randomly assigned either or. How do I do that? Best, corkinabottle...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Solving Buster captcha

I'm using a extension called Buster: Captcha Solver for Humans, and i need a script to use in ... captcha-solver-for/mpbjkejclgfgadiemmefgebjfooflfhl Thanks if you help me. image...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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259 views

1 answer

node.js - Webpack keeps on creating dist folder?

I'm working on server side coding using Node.js. I've noticed Webpack (I think) is randomly creating dist folder ... dist folders are auto generated and the purpose of it? Thanks....

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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462 views

1 answer

webpack异步加载scss文件无效

1.require.ensure([],function(){ require(./a.js); }); 2.a.js require(./a.scss);...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Hiding a particular error message from query results in google cloud logging

How to hide the repetitive log message ("Got more than one input Future failure. Logging failures after the first) as in ... image. Because i want to see the other error messages....

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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358 views

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jquery - Save variables globally from radio input

Having the following htmt and function. I can't get var skinColor to save "light" or "dark" after i click my button. How do ... ("You must select a skin to continue."); break; } }...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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