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python 3.x - Why matplotlib does not show the scatter plot in a second cell of a Jupyter notebook?

I'm drawing scatter plot in jupyter notebook which contains 2 cells from matplotlib import pyplot as plt import numpy ... plt.show() But running second cell still returns nothing....

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

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hook中如何获取子组件实例

在React Native里需要用到select组件，自己开发了一个，但是碰到了拿不到子组件实例的尴尬原来在class组件里可以通过ref很方便的拿到子组件实例，但是在useRef里只能拿到子组件 ... 到组件实例在React Native里有个方法 ReactNative.findNodeHandle（ref）需要传递组件实例，这个有没有办法解决呢...

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

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471 views

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ant design pro V4中的loading应该如何使用？

antd pro v4 项目新建后的登录模块 export default connect( ({ userAndlogin, loading, }: { userAndlogin: StateType; loading: { effects: { [key: string]: ... ？这里的loading又代表什么？对于我自己的模块我如何确定请求状态呢？...

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

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js 奇葩问题求高手解答

不科学两次打印arr1 怎么会是一样的？ ; 上代码 var arr1 = [{ pn: 1, bn: 2, name: '231' }]; console.log(arr1); for(var i = 0;i<arr1.length;i++){ arr1[i] = { pn: '', bn: '' } }; console.log(arr1)...

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

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请教个java基础的赋值和引用的问题

ListNode l1 = ListNode.init(1, 2, 3, 4, 5); ListNode l2 = l1; System.out.println("l2:" + l2);//l2:1->2->3->4->5 l1.next = l1. ... 很明白while语句处理l1后为什么打印出来的l1和l2不一样了，l1和l2不都是指向同一个链表吗...

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

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google cloud functions - Write query in BigQuery from Pubsub

need some help. I'm receiving messages with data in a PubSub topic, I need to insert the data I get from the ... SOMEVALUE) to have the correct values I need. Thanks in advance!...

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

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javascript - Console not appearing at the bottom in Chrome Developer Tools

When opening chrome developer tools, the console used to come below any open tab (like elements, sources etc.). However, I ... it there now. How do I put is back there again?...

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

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c# - How to get a list of values on a XML response?

I get from a webservice a XML like this: <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"> < ... nodeList) { firstname = node.InnerText; Console.Write(firstname); }...

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

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reactjs - Creating a prismic slice with next js

I am trying to add a slice to use on prismic CMS with next.js but am having trouble. I cant find many tutorials on ... state the steps to make a really simple 'hello world' slice?...

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

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flask - how i do two thread execution in python?

i'm doning a simple web application with flask, this app check proxies, it's work but, i have a trouble, i wanna ... " return render_template('index.html', prox = fin) return ""...

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

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excel - Formula to give accurate Quarter then Year

I have tried to make a formula using IF but could not successful. I know IF will ... /docs.google.com/spreadsheets/d/1jQufqt8WWD8Yoy7MjdOFCJWnUQl4RYX5oTxY_MCTvrA/edit?usp=sharing...

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

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azure - List all Storage Accounts and containers in Aure w/Powershell

I am a novice at Powershell. I have been tasked with listing all storage accounts, along with all the underlying ... "`nExported storage account usage report at $SAOutputPath`n" }...

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

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create index on existing collection on a MongoDB replica set (PRIMARY)

I want to add an index on an existing collection in a MongoDB replica set. This replica set has only a Primary, at the ... test one with very few documents. What am I doing wrong?...

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

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JS有优雅的方式给对象赋值吗？值为空，则不保留key

场景：传给ajax的params，参数值为空则不保留key，如 let params = { age: this.age ? age : '', curPage: 1, prePage: 20, } 这样写如果要判断0或者false就要写很长一串，有更优雅的方法吗？...

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

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git分支合并时，如何将所有的提交记录合并成一条？

现在有A B两个分支,当我在B分支开发，并提交了10条记录。现在我切换回A分支，怎么操作可以将B的所有提交合并成一条记录再合并到A？我想到的办法是现在B分支，rebase成一条，然后再切回A分支合并。但是我又不想破坏B分支的提交记录。...

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

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async 的语法糖函数是如何捕获异常的？——大佬间文章矛盾

async 函数的实现，就是将 Generator 函数和自动执行器，包装在一个函数里 async function fn(args){ // ... } // 等同于 function fn(args){ ... ); } run() .catch(function handleError(err) { err.message; // Oops! })...

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

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403 views

1 answer

Cordova not building Android app: "Task :CordovaLib:processDebugManifest FAILED"

I need to build an Android app using Cordova. I have installed on my machine (Windows 10): Cordova 10 ... ,android-29 Gradle: installed C:Program FilesGradlegradle-6.8ingradle.BAT...

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

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123 views

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ts中如何复用组件库的类型库？

最近在使用antd-design-pro构建一个后台管理系统用到了一个上传组件Upload 其中有一些相关的函数回调 <Upload name="avatar" listType="picture-card" className ... RcFile[]) => boolean | PromiseLike<void>; 但在当前的tsx中如何使用呢？...

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

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excel - Adding appointments to shared subfolders in Outlook Calendar

I am trying to create a macro that will add appointments to a specific shared calendar. I am able to add to the ... "Notes" .AllDayEvent = True .Display .Save End With End Sub...

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

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181 views

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php - PHPMailer - file attachment ERR

i've search here but i didnt find anything that solve the problem... hope someone could help me please.... i'm ... add the attachment i get "Could not access file:" thank you...

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

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343 views

1 answer

How to create custom claims in JWT using spring-authorization-server

I'm building an OAuth2 authorization server based on the experimental Spring project Spring Authorization Server My use case ... point. Did anyone manage to solve this problem?...

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

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407 views

1 answer

《javascript高级程序设计》括号包裹函数名

为什么第二部分的代码会报错呢？提示：object.getName(...) is not a function var name = 'The?Window' var object =?{ name: 'My?Object', ... .getName)() //?报错 (object.getName = object.getName)() //?报错...

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

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255 views

1 answer

How to creat a pyspark DataFrame inside of a loop?

How to creat a pyspark DataFrame inside of a loop? In this loop in each iterate I am printing 2 values print(a1,a2). now I want to store all these value in a pyspark dataframe....

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

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212 views

1 answer

VFP中如何将查询的两个字段合成一个字段

如题，数据库表格如下： id title name number 现在我想写一个查询语句，得出如下的表格 order_num title name 问：如何用VFP（Visual FoxPro）语句写？仅限VFP，其它的就不要写了我查得到~...

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

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236 views

1 answer

javascript - How can I tell if element is rendered?

I have simple html <div class="main-app"></div> <button class="btn"> CLICKME </button> <script src="./index.js ... is ready? and here is screen from inspect element of added html:...

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

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370 views

1 answer

请问大佬们安卓webview嵌套vue界面的bug

有时不显示又没报错这什么情况啊？...

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

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230 views

1 answer

关于time.Timer的疑问

上图中，当需要reset一个时间的时候，如果这个事件当前已经超时，通道里已经有有数据，则需要先取出数据再进行reset，这个我可以理解，但是如图的实现方法不会导致并发错误么？比如在if判断的时候条件不成立，然后当前协程被挂起，定时器 ... 协程被切回来并reset，但此时通道里已经有数据，导致被立刻唤醒？如果我的理解有问题的话请问正确实现应该是什么样的...

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

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600 views

1 answer

Vue怎么实现脑图功能,要有基本的添加，编辑，删除插入图片的功能

公司出了新的需求，需要再页面上制作脑图，可以添加，编辑，删除节点，并且支持插入图片和导出成图片格式。百度的kityminder好像不支持Vue，而且没有比较直观的文档。请问除了使用d3.js手写外，还有什么比较好的可以用嘛，十分感谢！！！！...

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

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