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javascript - How can I output hello world in this simple React code?

I used create-react-app from npm to start a new react project. I wanted to use this to do the learn react ... the same problem but was advised to post a better/updated version)...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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别人可能是工作（写程序）累了玩游戏放松一下

我是游戏玩累了，写点程序放松一下。唉，心好累。玩游戏不知道节制。...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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测试人员是怎样测试前端代码的呢？

我是前端开发小白。想知道前端是自己测试？还是有测试人员去专门测试前端呢？是写自动化工具？还是手动点点点？...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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432 views

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How to create a netCDF file with python netCDF4 from tif?

I would like to convert a folder with tif image to netcdf import numpy as np import datetime as dt ... ://drive.google.com/file/d/13TkWx3UgSyBt48nm0UMC6GJRO_Nwoch6/view?usp=sharing...

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

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902 views

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nginx 日志可以打印请求实际被转发的路径吗

nginx配置了几个location时，如果报错，怎么确定是不是正确匹配到了想要的location，或者是location中路径配置有错误。...

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

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256 views

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Springboot 与Mongodb

我在github找了个Springboot 与Mongodb的项目，项目的Springboot版本是1.5.2. 这个项目是简单的商品管理系统，它用mongodb存储商品图片当点击下图中的编辑按钮时：它就跳转到处理方法 ... 该怎么写MongoDb的上传图片到mongodb以及在编辑页面里显示mongodb里对应的图片或者有更好的方式？...

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

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c++ - virtual insertion operator overloading for base and derived class

Can someone please explain how to ensure that the derived function is called from a pointer of type base to a derived object ... << // derived details... return output; } };...

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

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想要显示一篇markdown文章的概览，除了设置标识外，获取（标记）数据的思路还有哪些？

在hexo中使用markdown进行文章写作的时候，可以在md文件中插入这个注释  ，然后这个注释之前的部分就会被当成文章列表页的文章概览显示出来但是这也就会导致一个问题，如果在文章里我想把 <!-- ... 会导致和hexo中一样的问题有没有一种办法，可以不通过这种markdown注释的方法来标识需要展示成概览的文章内容呢？...

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

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arrays - Receiving DecodingError.dataCorrupted error when decoding JSON file

I'm trying to create/decode JSON for the first time, so hoping this is a rookie mistake where someone can easily put ... format, which is intended to load an array of [Category]?...

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

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416 views

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Multi-platform copy files to Azure Blob storage from Azure pipelines

I want to copy the build results from my Azure release pipeline to Azure blob storage. Currently I use AzureFileCopy@4, ... a Blob storage file copy-task that works multi-platform?...

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

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596 views

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reactjs - React Native - Redux Toolkit with Redux Persist can't load components

Before changing from reducers to persistedReducer = persistReducer(persistConfig, reducers), my app works. It doesn't persist but ... going on and how to fix. Please help? :)...

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

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619 views

1 answer

webpack - NativeScript 7 with sqlite and typeorm

For a little test project i've tried to start a NativeScript (Angular flavor) with a sqlite db and typeorm. ns ... sample for NativeScript 7? Or an idea which module is missing?...

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

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545 views

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go map 按字典升序排序后转 JSON md5 与 PHP 不一致

源码如下 package main import ( "fmt" "sort" "encoding/json" "crypto/md5" "encoding/hex" "bytes" ) func ... .EncodeToString(h.Sum(nil))) // php 结果为 06820973e7b8d3acdb4763264a803620 }...

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

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169 views

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reactjs - how to publish a react js website on gitlab

i created a static react js project and i pushed it to git-lab excluding node modules. But now i am not able to ... Cleaning up file based variables ERROR: Job failed: exit code 1...

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

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373 views

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vue-echarts设置了title不显示

使用vue-echarts船舰的图标组件，图可以显示，标题不显示是怎么回事，官方的例子 <template> <div class="map"> <h1></h1> <v-chart :options="datas" /> </div ... Echarts) vue-cli3创建的，vue.config.js也配置了效果图：标题不显示，是哪里有错误？...

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

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612 views

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微信小程序中授权成功的时候，在点击退出登录的按钮时，让其默认

点击退出登录的时候，让其恢复到原来的默认头像这里就是使用的是获取微信授权用户信息...

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

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464 views

1 answer

基于angular 6.0 项目报错，基于 angular 8.0 的项目正常运行

答案：原因是 node_modules 依赖包没有完全下载！当前项目使用 node.js v11.1.0 对应 angular cli 6.0.0 之前安装过 angular 8 的环境，导致现在一直不好用当前 ... ", "dom" ], "plugins": [ { "name": "tslint-language-service"} ] } }...

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

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264 views

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php - Alternative to wp_update_post() in Wordpress REST API

I'm a beginner and I'm trying to write a Wordpress Plugin in PHP to auto-update content on multiple pages ... ' => $new_content]; wp_update_post( $edited_post); Thank you !...

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

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vue 路由的一个问题

const user = { template:"<div>我是默认的</div>" } const userA = { template:"<div>我是A</div>" } const userB = { template:"<div>我是B</div>" ... /body> </html> 有一个问题，为什么浏览器不需要触发点击事件就会全部渲染呢？...

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

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240 views

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os.path - Why the program can't find the file? python thanks

The code: I'm trying to open this file but Python doesn't find it. import os ,shutil, re , random #categoria a caso ... \lista.txt' I have no idea about how to solve the problem....

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

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211 views

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Problems with form in php script and using a javascript onchange href event

I have problems with an - I have to say - really old code I programmed many years ago (it worked back then) Here it ... to get it working again? Thank you all for your input. René...

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

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287 views

1 answer

How to import/download already existing cloudflare resource(s) using terraform?

If I have existing cloudflare settings (using web console), how to import/download existing cloudflare resource(s),e.g DNS ... it as a starting point to modify/update it. Thanks....

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

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376 views

1 answer

Scaling Socket.io Node.js App using Cloud Foundry and NginX Build Pack

I am trying to scale my Socket.io Node.js server horizontally using Cloud Foundry (on IBM Cloud). As of now, ... dynamically from CF? I am deploying my application using cf push....

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

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244 views

1 answer

dictionary - Python: How I can add values to keys and keys to dicts

I would like to have a system that assigns different commands to different categories! This is, how we get the commands: ... (): commands.append(config['commands'][k]['category'])...

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

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515 views

1 answer

DolphinDB如何只获取sql语句的执行时间，而不需要返回执行结果

比如一条sql语句，select * from t; 我只想得到这个sql语句的执行时间，而不需要得到这个sql语句执行后返回的结果集。...

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

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306 views

1 answer

iframe怎么保存token到cookie中

A页面iframe了一个B页面，A页面和B页面存在跨域，A页面的token怎么才能保存在B页面（iframe）的cookie中呢？B页面只是后台返回的一个url。...

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

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282 views

1 answer

HTML导航栏二级栏目如何始终居左？

代码效果：http://jsrun.net/kUvKp/edit 代码在上面的链接里，可以直接看到效果，我弄得二级菜单会随着主菜单移动，导致左边会出现空白区域，如何将二级菜单固定在最左侧，而不是跟着三角指针移动。...

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

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188 views

1 answer

这里代码的 Callback 是回调函数？

1. *?@return 2. *?@throws?IOException 3. */ 4. public static Response execute(Request request) throws IOException{ 5. return mOkHttpClient.newCall( ... 15. /** 这两个有啥区别，上面的和下面的请求...

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

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