Jonic Developer Community

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Welcome to Our Knowledge Sharing Community-Open, Learning,Share

Welcome to developer's Knowledge Sharing Community-Open, Learning,Share 欢迎来到程序员专属的知识分享社区! 一个分享知识，传递知识，学习知识的社区！...

asked Feb 5, 2021 in Others[杂七杂八] by ostack (1.4k points)

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354 views

1 answer

nuxt2.x 开发环境在IE11下报“对象不支持“entries”属性或方法“错，请问下大家怎么解决呢？

对象不支持“entries”属性或方法有些页面又可以正常打开。...

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

0 votes

446 views

1 answer

macos - "'<' not supported between instances of 'NoneType' and 'NoneType' " While working with StratifiedShuffleSplit's split() method

from sklearn.model_selection import StratifiedShuffleSplit split = StratifiedShuffleSplit(n_splits=1,test_size=0.2,random_state=42) for train_index, test_index in ... . enter image description hereerror message enter image description here...

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

0 votes

276 views

1 answer

arduino - Is there a possibility to get pseudo response from RS485?

I'm not very good at programming, but I am trying to make simple communication between USB to RS485 converter and arduino. I want to get instant response from ... to know if sending real data to the system there would be no data collision....

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

0 votes

285 views

1 answer

android - Is it possible to run ML Kit in Robolectric unit tests?

I'm curious whether it's possible to run Google ML Kit in Robolectric unit tests. If I try, I get the following error: java.lang.IllegalStateException: ... test runs perfectly if I run it as an instrumented test (with AndroidJUnit4)....

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

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247 views

1 answer

echarts图例

legend是垂直排布的，怎么能把图例的文字放在相应icon的下方，有什么方法么...

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

0 votes

458 views

1 answer

element el-tree 设置动态禁用延迟生效问题

发现出现不能及时更新禁用状态要点击才能更新而且是更新单个是什么原因 <el-tree ref="menuTree" v-model="roleActionVo.menuIds" :data="menuTree" show-checkbox node-key="menuId" style="overflow:?hidden;" ... => { return G(i, bool) }) } // 调用 R(Data, true) / R(Data, false)...

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

0 votes

325 views

1 answer

opencv编译出问题。急！

...

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

0 votes

328 views

1 answer

Element的table里面上传图片后，如何改变同行其他列的值

需求：在表格里面点击【1】的上传图标选择图片上传成功后，同行的【2】会变成绿色的下面是template代码 <el-table :data="tableData" stripe> <el-table-column prop="enclosureType" label="附件类型"/> <el-table-column prop=" ... 这个方法中写上传成功后可以把同行的isUpload的值变为true，但不知道怎么表示同行的isUpload的值，或者有其他更好的方法吗...

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

0 votes

366 views

1 answer

numpy reshape/transpose 3D to wide 2D

Make example letters = np.array([ np.array([ np.array(['a','a','a']) , np.array(['b','b','b']) , np.array(['c','c','c']) ]) , np.array([ np.array(['d', ... 'h', 'i', 'i', 'i']], dtype='<U1') I think I need to transpose... before reshaping?...

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

0 votes

371 views

1 answer

项目中的git文件老是自动被修改，请问是怎么回事？

这里我没有改动，也没有拉取代码，它自己就会不定时的新增修改的文件...

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

0 votes

425 views

1 answer

微信小程序视频的poster一闪而过

代码 <video id="banner-video" src="{{QINIU_URL + videoUrl}}" poster="{{QINIU_URL + posterUrl}}" show-center-play-btn='{{false}}' show-play-btn="{{false}}" controls picture-in-picture-mode='{ ... 试或者测试版的poster都会在作用滑动或者点击视频再次返回的时候会消失，然后点击才会再次出现...

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

0 votes

435 views

1 answer

Vue插件什么时候需要传插件实例给Vue构造函数

在用 vue + element-ui + vue-router + vue-i18n 刚开发完一个项目后，看到 vue-router 和 vue-i18n 都传了实例给 Vue 构造函数，而 element-ui 没有，想问问什么时候该传，什么时候不用传，原理是什么？我的项目构造 main.js 文件: new Vue({ el: '#app', router, store, i18n, components: { App }, template: '<App/>' })...

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

0 votes

464 views

1 answer

css - How to present website on different devices?

I've been wondering about one thing, but I don't really know what to call it. On some websites, they put an image with the website being presented on ... technique or is there an online tool that makes this possible? Here an example image...

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

0 votes

564 views

1 answer

python - Installing/using p5py/p5 under Anaconda

I have coded some projects in processing that I would like to continue in python under the python port p5py/p5. I am using Anaconda as my Python environment, ... not a pressing issue to me so suboptimal workarounds would also be of help....

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

0 votes

590 views

1 answer

django中app模块找不到

环境介绍 django verison=3.13, python version=3.9.0 因为要使用多个app，遂在项目目录下创建了apps这个文件夹放置其他app，在settings.py中也添加了系统路径，但问题就在这里，如下： Pathlib方式 sys.path.append(Path(BASE_DIR).joinpath(' ... , 'apps')) 就很正常的启动了疑问??? 有没有人遇到这个问题的？Pathlib在被django解析的时候出问题了？...

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

0 votes

514 views

1 answer

IDEA提示错误 java.lang.ClassNotFoundException: com.mysql.cj.jdbc？

java.lang.ClassNotFoundException: com.mysql.cj.jdbc at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1365) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass( ... 吗，可以修改数据库内容，但查询就给我报错枯了...

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

0 votes

554 views

1 answer

elasticsearch可以实现推荐用户的数据一直是最新的吗，且数据不是重复的吗...

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

0 votes

858 views

1 answer

web deployment - 404 Failed to load resource Deploying Flutter Web App to GitHub Pages

I am trying to deploy my Flutter app to GitHub Pages. App runs fine with flutter run -d chrome and builds successfully using flutter build web --release ... start... GitHub pages link: https://learyjk.github.io/superpacecalcweb/ Thank you!...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

613 views

1 answer

windows - where & which build path I've to set for StatusCode method. please let me know

package api; import io.restassured.RestAssured; import static io.restassured.RestAssured.*; public class First_lecture { public static void main(String[] args) { // TODO ... maps/api/place/add/json") .then().assertThat().statusCode(); } }...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

817 views

1 answer

Dart ffi - Reading emojis from file with C

I am saving a File with UTF-8 encoding which contains some information including a name for a button from Dart side with the following code: file.writeAsString([ ... I expected it to work with emojis. can anyone help me solve this issue?...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

802 views

1 answer

reactjs - Declaring Generics in React Typescript Function Component

I am working on a TypeScript React component whose props also take a generic type, so I declare the React component as export interface MyCompProps<T> { ... with TypeScript compiler. What would be the proper syntax to achieve that goal?...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

537 views

1 answer

java - How do I value a label using a database information?

I want to display the information in a database table using multiple labels. This information for each person is unique ... ; displayProfileDetails(jobDisplayQuery, JobLabel); displayProfileDetails(passwordDisplayQuery, passwordLabel); }...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.2k views

1 answer

sql server - How to loop through JSON array to insert rows in SQL Table using TSQL?

I have following query where I would like to insert data from JSON: INSERT INTO EncExt ( reference ,system ,code ,display ) SELECT JSON_VALUE(record, '$.id') AS ... "value":"ENCTR_SK" } ] } Image of record column where JSON objects stored:...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

719 views

1 answer

javascript - How can I Execute NodeJS Server Client Side With Html Button Or Alternative If Not Possible?

Intro: Hello. So I started on a chat based social media app with Socket.io, but it seems like the client needs to open a localhost server to be able to ... to do this sort of development for school and I just want some clarity. Thank you!...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

768 views

1 answer

c# - Transform Keras .h5 model to model usable by Emgu (OpenCV)

I'm a newbie in image classification. I've created a model with the easy-to-use website https://teachablemachine.withgoogle.com/train/image The trained model ... no success. I would like an easy way to achieve this. Thanks. Paludour...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

786 views

1 answer

webpack单独打包压缩一个文件夹？

需求：项目中有一个文件夹，里面是一些依赖关系复杂的js，文件夹外也有引用这些js，如何使用webpack打包压缩文件夹中所有js，并保证文件夹之外的引用不报错？谢谢！ 1.gulp-concat不会自动解析依赖，并且直接合并会报错 2.webpack entry好像不能读取文件夹路径，只能指定js？...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

728 views

1 answer

思否前端用了什么技术？

vue能不能做？...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

596 views

1 answer

r - Safest and most efficient way to do a conditional mutate with dplyr

I wonder what is the best way to apply mutate to a subset of the data, without removing data from the dataframe. For instance, I would like to calculate the mean ... opinion on this? Is there a "tidier" way to do this? Thanks in advance!...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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