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可以先跳过struts2、hibernate即ssh，直接学spring、spring-mvc、mybatis（ssm）吗

学完javaweb基础学习阶段（javase、servlet、jsp等等），现在学框架，可以先跳过struts2、hibernate即ssh，直接学spring、spring-mvc、mybatis（ssm）吗？？？...

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

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shell - Sorting by two substrings of the same column with only one reversed

I have a file that looks like this: 2836344588 ... ... N fs1q 2836344589 ... ... N fp2q 2836374222 ... ... N fp3q ... ... N fp6q 2836374224 ... ... N fp7q Many thanks in advance....

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

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angular - How to focus on mat-input on new row added in mat-table

I am stuck on the project and want some help. I have a mat-table and one button. On pressing that button one new row ... }) } this.answerOptions.filter = ''; this.spanDisplay(); }...

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

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visual studio code - Prevent VSCode from saving GIT commands in PowerShell history

My PowerShell history gets polluted with GIT commands from VSCode or its GitLens extension (not sure which one actually does it ... as git branch --delete. Any way to avoid it?...

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

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ionic应用打包部署了，但是连接不上服务器，就连写一个a标签链接到百度都不可以

ionic的应用安装好在Android手机里了，进入应用也没有问题，但是登录不了，发现无法连接服务器，于是我再写一个链接指向百度，就连百度都访问不了（但是我的手机是有网的！！）求解...

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

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firebase console - Read-only and non-realtime mode activated in the data viewer to improve browser performance || Now Database is Very slow working

Suddenly I am facing this issue, They show message on Real Time Database that define in title. after that database performance ... this topic, but I can't go back back completely....

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

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reactjs - Textfield material ui in 24 hours format

Does anyone know what is the props to make a textfield in material ui to be 24 hour format? I cant seem to ... ="startTime" value={this.state.startTime} onChange={handleChange} />...

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

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html - How to break word in list item of bootstrap 4?

I'm having a list using bootstrap 4, but some item inside contain long text, it causes problem on small screen device. I tried to use ... long textt...........</a> </li> </ul>...

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

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很急，bootstrap里form样式的div里的按钮，为什么不能跳转？

<div id="loginModal" class="modal show"> <div style="height: 50px;"></div> <div class="modal-dialog"> <div class="modal-content"> <div ... div可以直接跳转了可是这样页面样式不太对劲了毕竟用的bootstrap的样式...

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

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vue.js - How to get vue slot property in JSX?

I write a child component used template syntax, child component has a slot that transmits 'item' property to parent component, but ... is not defined </template> </Child> ) } }...

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

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block - CORDA Development

I need to implement CORDA Block Chain in our performance appraisal application which is developed in .Net Core and ... it. Your reply is really appreciated. Thanks, Kopal Rajpoot...

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

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如何查找目录下所需的文件

目录下有按日期生成的文件: AA_20170101_0001_SHEETS.xml AA_20170101_0002_SHEETS.xml ... AA_20170102_0001_SHEETS.xml ... AA_20170301_0099_SHEETS.xml ... ，使用其他的一些函数也行，望指点，谢谢...

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

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perfect编译入门项目使用swift build编译不成功

按照perfect的配置页面（https://www.perfect.org/docs/...）克隆编译入门项目在mac 本地上然后使用swift 进行编译报错 swift编译不通过不知具体的问题终端代 ... 需要按照perfect 软件接口库，比如OpenSSL libssl-dev和uuid-dev么 mac 上使用brew配置 openssl...

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

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关于几个移动端问题的探索3.1

在唯品会看到这几个css属性，transform但是这个属性在这边完全没有必要吧在图片加上 transform-origin: 0px 0px 0px; opacity: 1; transform: scale(1, 1); 算是什么 ... 吗？图片外层包裹的a标签声明block，但是为什么还需要给a标签加入? background: none;...

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

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vs code编辑器又没哟像sublime一样，右侧有代码区块总览的插件？

如下图 sublime右侧有代码缩略图，但现在想问问，vs code里有类似的插件吗？可以用来显示该文件所有代码的缩略样子。另外想问问这个右侧代码缩略图的专业术语叫什么呢？...

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

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win10选定文本颜色有时会产生变化是怎么回事？

如下图，这个蓝颜色有时会比平时的深蓝色要淡不少，是怎么回事呢？今天就变回原样了。...

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

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python - Converting the Numbers into equivalent Roman Numerals

I have tried the Number Conversion into its equivalent Roman numerals. Please suggest me to reduce the implementation of the ... Numbers into Roman: Enter the number :199 CXCIX**...

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

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unity3d - my box collider turning on and off loop Unity 2d

im pretty new at programming and im working on a little game i am working right know on a crouch function and + my ... theScale.x *= -1; transform.localScale = theScale; } }...

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

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大家来说说js如何判断对象为空？

这个是我的判断方法，大家还有别的判断方法吗？...

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

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python - #quickfix import failed in windows10

system: windows 10, language: python 3.6.5 I installed the quickfix 1.15.1 by pip install quickfix-1.15.1-cp36-cp36m- ... finished with exit code 1* And I had installed .Net 5.0...

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

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TypeError: printBB() takes 0 positional arguments but

class BB: def printBB(): print('no zuo no die') BB.printBB() bb=BB() bb.printBB() no zuo no die TypeError: printBB() takes 0 ... 身对象不加self相当于没调用本身对象，所以bb=BB（）旗下没printBB方法？...

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

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350 views

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Integrating the firebase into the mobile app

Can any one help me in integrating firebase into the mobile app. Problem is happening when we sync gradle file. Thanks in advance,...

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

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sql - Update null values when we use Addition assignment (+=)

declare @temp table ( Id int, Qty int ) insert into @temp values(1,null) update @temp set Qty+=2 select * from @temp I am ... update I am getting a null value I need Qty to be 2....

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

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typescript - Web3.js extending the window interface type definitions

Web3.js web3 into the window object. Browser Wallets like MetaMask inject ethereum into the window object. ... Window type interface issues and intellisense suggestions in VSCode?...

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

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我的 session.cookie_lifetime 命名设置的0 ，然而这个cookie的过期时间却是一年后？什么情况

...

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

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293 views

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bash - How to have a part of `~/.bash_profile execute only on shell open?

I have been searching high and low for this answer, maybe it is a dead-end road I don't know. I am running ... to env or to hold some secrets, as this bash_profile is versioned...

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

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javascript - toDate is not a function error in React using Firebase

I'm trying to fetch a date object stored in a Firebase Firestore collection I've linked as a DB to the app I'm ... some error. Any help would be appreciate to fix this anamoly....

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

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806 views

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pagespeed insights 指出的图片压缩对比，是基于什么算法？

pagespeed insights 测试自己的网站，网页的图片已经压缩过了，但是谷歌提醒还可以节省大概 50%体积。个人感觉Google的压缩算法有点狠，我已经无损然后有损压缩了，还是达不到Google的标准，请问Google的压缩算法是怎样的，有公开资料么？...

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

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