Recent questions in Technique[技术]

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I have a dataset named bwght which contains the variable cigs (cigarattes smoked per day) When I calculate the mean of ... But nothing seems to work! Can anyone please help me??...

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

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关于vue配置删除console.log的问题

这个是我的vue.config.js，，为什么配置删除console.log有时候代码报错在浏览器下的提示页面删除了，，请问怎么配置 module.exports = { publicPath: './', lintOnSave: false, ... "@/assets/common.scss"; // ` // } // } // }, };...

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

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sql - How to choose value in key table with multiple choice

I have a table A with the following type for data col1 | col2 -------- e1 | A e2 | A e3 | B e4 | B ... postgresql? I tried using the distinct keyword but they share the same id ......

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

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python - Discarding the initial reports in multiple excel and create one dataframe pandas

In a folder,there is multiple excel files with initial unwanted report and the unwanted footer also. Unwanted number of ... = pd.concat(dfList) Thanks in advance for your help....

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

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filebeat7.9 配置输出到redis问题

最近在windows server上配置filebeat7.9 输出日志到redis，遇到了一些问题，filebeat好像能扫描到文件，但是不能输出到redis，求助是不是配置有问题，filebeat日志中看到这么一条：" ... events":{"active":0}}},"registrar":{"states":{"current":180}}}}}...

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

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javascript - How to use React Navigation universal links with path parameters on Android?

I have the following domain: https://demoproject.com I would like to link all URL-s with /demo path parameter with my ... ideas how to solve this or what am I doing wrong here?...

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

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293 views

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g2开发的饼图，交互问题

图中红框内的文字溢出区域被切割了，有没有解决方案？或是好的交互方式代替？...

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

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Spring-MyBatis - How to achieve transaction Rollback for method having both batch and simple query execution?

I have a Spring Boot application with MyBatis mapper DAO layer. I have a method call (serviceA.insert(records)) which ... as expected. Please help to achieve rollback in this case....

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

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javascript - Chart.js scatter chart plot data joins start and finish points together

I'm currently trying to write a short program that captures data on mouse movements, scrolling and keyboard ... scroll) addDataScatter(keysChart,newData.decTime, newData.keys) })...

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

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555 views

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vue管理系统角色菜单权限控制

各位进来的前端大哥能不能提供下管理系统角色菜单权限实现思路嘛！如果有代码的话也可以发给我这个前端菜鸟参考下 QQ：1262352148 可以加QQ发我一份谢谢了...

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

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138 views

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typescript - Group elements in an array with count

I am tasked with essentially converting an array that follows the format ['A','A','A','A','B','B','C ... wondering if there are any other methods of achieving this without this....

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

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575 views

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如何调出vscode 代码版本冲突选项？

现在拉取代码后vscode没有显示冲突选项如图：应该在哪里配置如下选项呢？...

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

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python - Why fancy indexing is not same as slicing in numpy?

I have been learning Fancy indexing but when I observed the behavior of the following code I got a couple of questions ... ? And how to achieve that? Please enlighten me. Thanks...

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

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407 views

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reactjs - This expression is not callable. Not all constituents of type 'string | ((searchTerm: string) => Promise<void>) | []' are callable

I have my custom useResults hook like this import { useEffect, useState } from 'react'; import yelp from '../api/yelp'; ... ": true, "resolveJsonModule": true, "strict": true } }...

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

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reactjs - history change url does not load

When you click on the button, the url changes but the redirect does not occur. If you reload manually, then it opens the desired page. ... /> </div> </div> </Switch> </Router> ); }...

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

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400 views

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如何基于 Kafka 打造高可靠、高可用消息平台？

Kafka 是当前非常流行的一个消息系统，最初用作 LinkedIn 的活动流式数据和运营数据处理管道的基础活动流式数据主要包括页面访问量PV 访问内容以及检索内容等运营数据指的是服务器的性 ... .cn/article/... *《Kafka（三）Kafka的高可用与生产消费过程解析》 https://www.cnblogs.com/frank......

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

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不同的项目，前端在请求后端接口的时候想携带同一个cookie ，如何操作呢？

现在有两个项目，两个项目都是请求的一个后端服务。B项目是Vue写的，现在把这个Vue项目打包之后，直接放在A项目之下，并且它的AJAX请求，能直接携带A项目的cookie。请问应该怎么弄呢...

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

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222 views

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ES6 Symbol的使用场景

let s=Symbol(); ，这样s就是一个symbol数据了，它是一个独一无二的值，他不是对象，不能添加属性。也不能和其他类型的值进行运算 symbol这个数据类型，总体来说感觉特别抽象特别缥缈，大家在实际开发中，什么场景下会用到它呢？还有Map 也是同样的疑问。。。。。。。...

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

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AndroidStudio升级4.0后，鼠标移到代码上，相关quick doc弹窗闪了一下就消失了是为什么?

就这种弹窗，鼠标移到代码上之后，会自动出现，但升级到AndroidStudio4.0之后，这个弹窗总是闪一下就消失，是新版本BUG还是有哪里可以设置显示策略/时长之类的？...

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

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javascript - how can I make an array in a mongoose schema and push to it

I'm trying to make a ,setchat command in discord.js. It will basically push a channel ID to my mongoDB database but I cant ... [], }), ); any help would be appreciated. Thank you...

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

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179 views

1 answer

为什么Python的类型标注没有对类型进行检查？

尝试了一下Python的类型标注(Type Hinting)，但是发现Python并没有帮我检查类型 from typing import * L?:?List[Tuple[int, str]] = {x:x+10 for x in range(10)} ... ，但标注之后既没有报错也没有提示我觉得有点奇怪，难道typing只是给开发者当提示的吗？...

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

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467 views

1 answer

vue keep-alive的组件切换时慢和卡顿

问题：当没给vue keep-alive的include没有任何数据的时候,切换route非常的顺畅,但一旦加入几个组件的名称时切换就开始卡顿，甚至移除清空include也不能恢复。有谁遇到过或者有解决方案的可以分享指导下吗?谢谢。...

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

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310 views

1 answer

怎么理解k8s集群？

k8s的集群是什么？比如有1个master， 5个 node，那么集群是指的这6个实体节点吗？还是指的包括所有的k8s相关的服务（比如etcd, controller-manager）等？...

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

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请问actuator监控hikaricp的指标项是什么？

请求接口http://ip:port/actuator/metrics/hikaricp.connections.usage 返回： { "name": "hikaricp.connections.usage", "description": "Connection usage time", ... 连接总使用次数连接总使用时间但MAX猜不出是啥玩意....

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

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251 views

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javascript - Keep param consistent on location change ReactJs

I am using react router v4 to change location in ReactJs. this.props.history.push("/profile"); <Link to="/profile" ... you guys help me to keep source=test consistent even in URL....

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

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531 views

1 answer

pandas - Vlookup/Map value from one dataframe to another dataframe in Python

I want to do something similar to the vlookup in the python. Here is a dataframe I want to lookup for value 'Flow_Rate_Lupa' ... any one to help me to solve how to do this QAQ...

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

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379 views

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React函数式组件，如果是不需要显示在页面的状态，是不是定义在函数外面比较好?

比如test并不需要显示在页面但是在组件App中会用到，是不是定义在App组件外部比较好，这样可以减少App组件渲染次数，而count是状态所以通过useState定义在函数内部？ let test ... > { const [count, setCount] = useState(0) return ( <span>{count}</span> ) }...

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

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422 views

1 answer

stm32cubemx - Creating BSP for Custom STM32 Board with I-CUBE-LRWAN

I have a custom board with STM32 microcontroller and SX1261 Radio Module. I am familiar with I-CUBE-LRWAN from ST ... board including I-CUBE-LRWAN? What files should be added?...

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

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