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336 views

1 answer

android - What is the meaning of "ClassInstance.[Someclass::class.java]" in Kotlin?

I've seen people using ViewModelProvider[Someclass::class.java] instead of ViewModelProvider.get(Someclass::class.java), ... couldn't find any documentation of such usage online....

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

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569 views

1 answer

vue router.beforeEach登录拦截怎么用window.location.href跳转

怎么用next()去跳转...

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

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372 views

1 answer

把窗口width显示在页面上，如下代码怎么不行?谢谢

<!DOCTYPE html> <html> <head> <style> </style> </head> <body> <div class="hh">111</div> </body> <script ... ("hh") m.innerHTML=window.screen.width } </script> </html>...

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

0 votes

468 views

1 answer

Group by and take count of first occurrence Pandas Dataframe

A pandas dataframe has 2 columns. Number Character 111 a 111 a 111 b 111 b 111 c 222 b 222 a 222 c 222 b 222 a 222 c 333 c 333 a 333 a 333 b 333 c 333 c...

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

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172 views

1 answer

Elementui table el-table-column 单独赋值

现在有个问题，table表格在赋值时是根据data中数组的字段通过props进行赋值的，现在我不想从data中取地址了我想自定义一个地址，比如北京，然后手动赋给地址这一列的每个值，应该怎么写...

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

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285 views

1 answer

如何快速将 userModel 的值覆盖到 UserData里

class UserData :ObservableObject { @Published var id :Int = 0 @Published var nickName :String = "0" @Published var exp:Int = 0 ... .data.nickName = n.nickName 这样赋值太慢了而且不好维护...

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

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199 views

1 answer

Solution for email signature - random video from a repository

I am looking for ideas on creating a random video in an HTML email signature. The plan is to take a video ... random video that I linked in an email. Any better solutions?...

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

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164 views

1 answer

关于highcharts的问题？

如何才能在饼状图每一项的内部设置如下图的这种百分比解决方案设置distance...

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

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387 views

1 answer

Qt Installer Framework. How to enable overwrite installation

The last post about overwriting existing installation was 3 years ago on QtIFW 2, 3, so I hope this won't count ... will only delete what is in TargetDir. Any suggestion please?...

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

0 votes

190 views

1 answer

jQuery中的Callbacks传入的options是如何处理的

为啥要jQuery.extend来处理一下options而不是直接options呢...

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

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521 views

1 answer

vue使用layer弹窗被遮挡

如图，在vue中使用layer弹窗内容是一段元素，放在vue页面中，打开以后被遮罩挡住 layer.open({ type: 1, title:"会员详情", content: $('#detail-box'), }); 官方是说最好放在body最外层，但是vue不可能随便去修改index.html的，所以该怎么解决。元素没放在body最外层，又能正常弹出...

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

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176 views

1 answer

reactjs - React, load main scripts dynamically depending on the domain

We have more than 5 domains and use one server. And we need to load scripts using CDN. For example, site1.com ... reactjs generate files and URLs in building How can I solve it?...

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

0 votes

510 views

1 answer

python - Automatically generating ExternalTaskSensor where execution date depends only on DAG id

Help me crack this one. I am looking for an elegant solution for dynamically generating ExternalTaskSensor tasks ... aesthetically pleasing and I am looking for something better...

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

0 votes

332 views

1 answer

node.js - Create mongoose schema methods using TypeScript

I try to create method hashPassword for user schema. schema.method("hashPassword", function (): void { const salt = bcrypt. ... = mongoose.model<IUser>("User", schema, "users");...

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

0 votes

112 views

1 answer

How to load javascript files using event listeners

This question is not duplicate of Conditionally load JavaScript file and nor this How to include an external javascript file ... page again and again to load the correct script....

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

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462 views

1 answer

为什么我在文件中只用导入子类，而不用导入它的父类和它的实例属性？

题目来源这个题目来自：《Python编程：从入门到实践》第1版,习题9-12：多个模块相关代码 user.py class User(): def __init__(self, first_name, last_name, sex, age): ... 都应该会报错啊但是，书中的答案就是这样写的，运行也出现了想要的结果 ...

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

0 votes

118 views

1 answer

php - Fetch returns nothing to <Text> after getting info from page 1 to Query API

This code works for php and returns the json Data, tested on my browser and postman <?php $host = 'localhost'; $db_user = ' ... }); I need a guide as to what i am doing wrong...

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

0 votes

280 views

1 answer

javascript - React Native Firebase Get Document by Field Value (Wildcard) (doc path) Works in React but Not in React Native

I will explain the issue below, but can say I think this line works for me in React but does not in ... = firebase.firestore().collection('posts').doc('qRHqV8w6iyx4yHWg76tN');...

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

0 votes

525 views

1 answer

使用VS时，为什么关于el的代码都不能折叠了？

RT，昨天还可以折叠，今天打开就不能折叠了，代码多了看起来有点花。。其他的代码都还可以折叠，就关于el的代码不能折叠了，如：el-card或者el-tabs之类的，一大串o(╥﹏╥)o...

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

0 votes

253 views

1 answer

element中如何给table中悬停行时添加提示文字？

比如说，鼠标移动到其中一行，该行上边显示双击打开详细内容。这该怎么做呢？...

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

0 votes

891 views

1 answer

ethereum - Execute TX specific block.timestamp

I'm looking for a quick help, I have a smart contract with a function including "require (block.timestamp > ... or pointers where I need to search for more information :)...

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

0 votes

261 views

1 answer

linux - No video output on OSX KVM, CPUID error? "host doesn't support requested feature"

I am trying to make an OSX (high sierra) KVM following this guide : https://passthroughpo.st/new-and-improved-mac-os- ... please tell me and I'll try to. Thanks in advance!...

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

0 votes

265 views

1 answer

Calculate difference between two sets of dates and divide the results in Flutter

I have four dates (date1, date2, date3 and date4). I have a script that works out the number of days between date1 and ... the 'best' way of doing this, but it worked for me....

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

0 votes

380 views

1 answer

javascript - React Native Navigation Listener. How to stop page refresh when coming back from certain pages

I have logic that makes my home page refresh every time the component is mounted. I do want it to refresh every time I go from the home ... }) }} /> )} /> </View> </View> ) }...

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

0 votes

790 views

1 answer

accessibility - TalkBack announces "Double tap and hold to long press" on WebView

Background: When focused on a WebView control, TalkBack announces something to the effect of "Bing. WebView. ... just completely ignores those properties on a WebView control)....

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

0 votes

260 views

1 answer

puppeteer如何打包分发？

一个nodejs项目依赖了puppeteer，如何将其打包成exe安装包，在没有node环境的机器上安装使用？...

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

0 votes

459 views

1 answer

javascript - Beautify only selected code in ace editor

I'm using the ace editor in javascript and I want to make a shortcut that beautifies the selected code (and ONLY the selected code). Are there any ways to do this?...

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

0 votes

500 views

1 answer

python - TypeError: 'NoneType' object is not subscriptable on Heroku

my code running as well when i run in local but i got TypeError: 'NoneType' object is not subscriptable when i ... app[worker.1]: TypeError: 'NoneType' object is not subscriptable...

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

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