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Virtualbox 6.1.10, Ubuntu 20.04 bad return status build on kernel 5.8.0, package virtualbox-dkms error

Not so much as a question as a documentation. This is regarding a failing apt-get install or update related to ... directly from their website to get virtualbox ^v6.1.16....

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

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requestImageDataAndOrientationForAsset 内存泄露崩溃

IOS 相册里图片很多比如2000多张内存飙升到1g多崩溃了 There are a lot of pictures in the IOS photo album. ... weakSelf dealImageWithIndex:index exactImage:result originImageData:imageData]; }]; } }];...

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

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json - Kibana7 -Visualize - divide aggregated metrics to a new custom metric

I'm looking for a way to divide aggregated metrics to a new custom metric. An example for a table I want to have ... columns from the example) and show it on the Visualize page....

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

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android - Bluetooth BLE can't connect and don't know if i'm on the wrong way to do it

I'm a begginner on Bluetooth LE, I can scan all Bluetooth Device but I can't connect to the device. I got ... :513) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1101)...

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

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java - How to tell SonarQube not to apply a certain rule if the affected code satisfies some regex rule

There is a SonarQube rule named The diamond operator ("<>") should be used. The codebase I'm working on is ... such reports, other than marking everyone of them as false positive?...

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

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element el-tree 设置动态禁用延迟生效问题

发现出现不能及时更新禁用状态要点击才能更新而且是更新单个是什么原因 <el-tree ref="menuTree" v-model="roleActionVo.menuIds" :data="menuTree" show-checkbox ... i, bool) }) } // 调用 R(Data, true) / R(Data, false)...

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

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请问Ant design pro中页面不停地在发送umi请求是怎么回事?

如图所示...

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

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java - How to get data where time column (LocalDateTime) has 00 minutes?

I need query to retrieve all entities from database who has 00 minutes in TIME column which is represented as LocalDateTime? ... ://i.stack.imgur.com/22Ufc.png Thanks in advance....

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

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3.0k views

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python - How to convert API sourced String Unicode to UTF-8

I'm having trouble converting data from the following list into UTF-8, I have to convert it in order to insert ... ]) # contador countador += 1 except ValueError: return lista...

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

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2.8k views

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python - How can I use custom filters in the Stack Exchange API?

I am trying to get the questions and answers from StackApi to train a deep learning model. I have the problem that I ... the withbody filter with a custom one and if so which one?...

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

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asp.net mvc - MVC Form DropDownListFor

In my view I am building a form where the user select a country from a list of Countries.I get this error about ... catch (Exception e) { } return View(TemplateName, result); }...

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

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1.5k views

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微信小程序的事件在哪里查

像bindtap,bindchange 都不知道干啥的,文档也不是特别系统...

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

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1.3k views

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请问如何将从嵌套型接口返回数据中挑选出需要的内容

定义变量result，类型为any(为了防止提示类型未定义),将接口返回的内容赋给result,result打印结果如图所示我想要从这些数据中挑出一部分内容用于前端显示，使用result.apiVersion能够正确取出对应的值， ... undefined，可是result不是已经设置为any了吗？请问这个要如何解决呢，我应该如何写才能正确取出值呢？...

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

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1.3k views

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mysql小白-添加复杂约束的语法

需求：往 student表中添加邮政编码postcode列要求：字符型，长度为6，可以为空，若不为空则要求postcode只能为数字，不能为其他字符...

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

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2.8k views

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用node写后台的接口到底是怎么回事？

我一直有个疑问就是用node写接口到底是怎么去写，然后怎么跟前台去使用的？我现在有个模糊的概念：现在普遍都是用的node的一些框架（不知道是不是称之为框架）koa egg express 这些这些其实大部分都是做了一件事我感觉，起一 ... ，我现在想用node去写一个接口，尝试下有没有大佬们有node写的一些后台项目，跟前端是分开的项目，我研究研究...

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

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1.4k views

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DolphinDB中有什么工具可以监测使用情况？

DolphinDB除了java客户端的GUI，还有其它工具可以监测DolphinDB的使用情况吗？比如有多少客户端链接上来了；比如内存、cpu使用情况等等。...

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

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3.8k views

1 answer

react 通过Context将state传递下去了，子组件可以更新该state么？有什么比较好的方式？

子组件可以很方便的是用传递过来的值，但是想要在组件键更新该值。原先是传递一个{}但是这样虽然可以修改，但是没有进过setState不会出发重洗渲染。...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.6k views

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组件依赖包，引用后regeneratorRuntime is not defined报错

自己尝试写了个npm依赖包，组件用了async/await,引用到测试项目中使用时报ReferenceError: regeneratorRuntime is not defined。测试项目中已经配置了"babel-plugin-transform-runtime"。请问，是依赖包中要对async/await做什么处理吗？...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.7k views

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怎么能让几个img在div里排列在一行，div有水平滚动条

html的问题...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.6k views

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excel - Unable to display all the table fields from XML in Report Builder

I am having a hard time display all the table fields in Report Builder especially the table that had a NULL or ... display all table fields from XML files in the Report Builder?...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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4.6k views

1 answer

python - Multiple integral using scipy.integrate.nquad - errors on lambda function

I attempt the following multiple integral in the code below for a higher-than-bivariate version (n=2) of a ... integrate.nquad? The documentation does not give a matching example....

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.6k views

1 answer

spring boot的状态机StateMachine有啥用？

用于什么场景下啊...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.6k views

1 answer

配置了webpack别名编译器还是识别不了

如上图，webpack和tsconfig都已经配置，编译也可以通过，但是编辑器上还是报红线，是什么原因？...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.7k views

1 answer

Flutter有哪些好用的插件？

各种功能类的...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.5k views

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求助关于模型部件隐藏

NOP_VIEWER.model.visibilityManager.setNodeOff(NOP_VIEWER.getSelection()[0],true) 上面的命令可以隐藏一个部件，我想请问这个隐藏之后可以加快渲染么？进一步我能设定模型渐进式渲染的部件顺序么？通过什么设定这个渲染顺序...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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4.0k views

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pyspark - Null value for column when selecting using dot or bracket notation but not when using UDF

I'm trying to clean up some nested data and extract the fields I care about. My schema for the nested value is: | ... list<text>, id text, coding list<frozen<coding>> );...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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4.4k views

1 answer

使用typescript的react项目中，如何声明antd的formRef的类型？

代码如下： class App extends Component<Tprops, Tstate>{ formRef: React.RefObject<unknown> ...... this.formRef = React.createRef(); dosth = () ... .. </Form> } } 我应该如何声明formRef这个属性的类型呢？...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.6k views

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为什么springboot中线程类获取组件失败

//线程类 public class EmailTask implements Runnable { //这个组件无法获取到 @Autowired private MailUtil mailUtil; private void register() { ... //发送邮件 try { ... （请勿用截图）你期待的结果是什么？实际看到的错误信息又是什么？...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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