Recent questions in Technique[技术]

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关于硬币找零的问题？

场景给定硬币种类为1,5,11 求找零32共有多少种情况？感觉应该是f(n) = f(n-1) + f(n-5) + f(n-11) 不知道这么用代码实现原来这个题这么复杂美团校招在线考试笔试题：钱币面值组合...

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

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264 views

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c - SAL annotations for returning reference counted objects

I'm trying to use SAL annotations to guard against certain possible errors when using reference counted objects. Annotations ... or is this something that SAL can not express?...

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

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networking - Python Script to ping a list of specified hosts in a .txt file

I am working on a script that would allow me to ping multiple hosts to check their status. Currently I am getting 2 errors ... the workers to terminate. for w in workers: w.join()...

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

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javascript - (SOLVED) REST API (http and https) Ajax Call is not working in Latest Cordova Ver 10.0.0

I have developed an application by using Cordova 9.0.0 and it's in production for more than years. Recently a few days ... ionic 5 EDIT: Below error response is log on API call....

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

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Axios使用代理IP请求

问题描述使用vue想要实现爬虫，需要通过代理ip来访问到目标网站，根据文档使用了axios的proxy配置却无效果问题出现的环境背景及自己尝试过哪些方法网上搜索全部是关于proxyTable解决跨域的，没有有用信息 ... }).then(res => { console.log(res) }) 你期待的结果是什么？实际看到的错误信息又是什么？...

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

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java中接收到了串口的数据怎么根据通讯协议进行解码。

通过串口读取到了一段数据如何通过设备通讯协议进行解码操作...

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

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gulp - update to glup 4 with node 12

i'm trying to update a projecjt with gulp 3 to gulp 4 (node 12) i've got this error ... file .. srcvalidation.cc) C:PROGETTIAcmeGitFrontend_Angular ode_modulesutf-8-validate ode_mo...

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

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element select下拉框异常

在线demo： https://codepen.io/Swarz/pen/RwaPaOO github问题：https://github.com/ElemeFE/element/issues/20025 select①输入无法匹配的值，比如 sdasd ,等待无匹配数据出 ... 选择一个值后重复1 2 动作 select②下拉框最下面多了无匹配数据 ...

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

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427 views

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How to input discrete heat coefficients into the function 'thermalProperties' in MATLAB using PDE Toolbox?

I am solving a 2-D transient heat transfer equation. The thermal conductivity coefficient is dependent on space location ... have discrete coefficients, how can I use PDE Toolbox?...

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

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738 views

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ant design vue中表格组件的数据全部默认选中

一进来到这个表格,里面的的数据要全部默认选中,而且新添加的内容,也要全部选中...

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

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python - tkinter returning all database columns in one column

I am trying to use tkinter to display information from a MongoDB database. However all of the different db columns are being ... in rows: tree.insert('', tk.END, values=row)...

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

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java - How can I convert each integer/double value to String from JSON data containing nested objects and arrays?

I want to convert each integer/double value to String present in json request before storing in MongoDB database. ... store documents in mongodb with attribute type as String ?...

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

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350 views

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math - Is it possible to calculate bitwise OR just by looking decimal numbers?

Is it possible to calculate the BITWISE OR value for two numbers just by looking the decimal numbers ( or without converting them to binary form)?...

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

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463 views

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iview复选框设置选中也不勾选

<Checkbox checked.sync="true" @on-change='anonymous'>匿名</Checkbox> 设置选中也不勾选，求教...

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

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183 views

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关于jQuery.createOptions中的正则

var rnothtmlwhite=/[^x20 f]+/g; function createOptions(options){ var option={}; jQuery.each(options.match(rnothtmlwhite)||[],function(_, ... }); return option; } /[^x20 f]+/g啥意思呀...

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

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478 views

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Confluent Kafka Azure blob source storage connector error_code": 500, Failed to find any class that implements Connector

I have two queries - 1- I'm trying to send data from Azure Blob to Kafka with Azure blob source confluent connector. ... Also, please let me know pipeline how I can configure this....

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

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求助 xpath如何匹配多个标签类似或语法

目标网站： https://mp.weixin.qq.com/s/ECFS_A5JTMB_TvS8AB836Q 网站的文字内容在section 和 p 两种标签下匹配结果如下求助我想同时匹配这2个标签应该怎么写匹配规则目前已知string(.) 可以匹配标签下所有文字但实际场景需要用同时匹配2个的匹配规则...

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

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a href 打开就是403，复制到浏览器打开就正常，这个怎么回事，改怎么解决

` 下载 ` <a class="aspan" href="https://st2.thefront.com.cn/2020/pm/1598108627312.xlsx" target="_blank">下载</a>...

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

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171 views

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c# - How to add files into List based on filename

I have files in a directory. I want to add each file to the list based on the filename in the loop. first need ... file in files) { Console.WriteLine(Path.GetFileName(file)); } }...

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

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reactjs - React function displayBanner compile issue

I am currently working on a project and trying to hide a banner by changing the state of a className like the ... dismissed. Can anyone assist in explaining what I?am missing?...

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

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Find if 2 polygons have an intersection (Geoserver)

I need to check if 2 polygons have at least one common point. What should be a proper CQL syntax for WFS ... at least one common point or intersection with the source polygon?...

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

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NIO 中的 Channel 与 Selector，与 Golang 中的 channel 与 select 比较？

Java 的 nio 中的 Channel 与 Selector 是为了实现 io 的多路复用和异步，是否可以像 Golang 中的 channel 一样，用于并发实体之间的通信？...

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

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240 views

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python - Can I add multiple images as canvas items and rotate them simultaneously?

I am trying to rotate images using canvas items. I was successful in doing it with one image. But if I want to perform ... Tk() app = SimpleApp(root, 'cat.jpg') root.mainloop()...

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

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Vue可否在render函数操作VNode，怎么操作？

我尝试做一个高亮关键字的公共模块；这个模块会接收一个模板（传入模板的结构是不固定的）和一个关键字，然后把模板中存在关键字用class="high-light"包裹起来如传入模板 <div ... parent: item, element: _item }); }); } list.shift(); } return component; } });...

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

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有哪些WebScoket测试软件助手？

想测试webscoket开发，对开发的带有webscoket的服务端和客户端程序进行测试，不知道有没有现成的webscoket测试工具，能模拟客户端和服务端。有很多原生socket测试助手，那有没有WebSocket的测试助手呢？...

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

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xslt - Hide a topic from PDF output at xsl level

I have a topic, which only contains some metadata (childs of prolog and some custom elements too) of the ... Bookmap spec.; XSL FO based transformations; Thanks in advance!...

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

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226 views

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关于windows下py --version与python --version的问题

在Windows下，为什么使用python --version显示的版本是2.7的，而使用py --version则显示3.8...

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

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173 views

1 answer

vue表单重置无效

<el-dialog v-if="formOpen" :visible.sync="formOpen" center :close-on-click-modal="false" :close-on-press-escape="false" :title="(form ... }).catch(() => { this.msgError('修改失败！') })...

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

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