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Commit errors after importing OpenCV into Android Studio

I've tried nearly every guide to importing OpenCV into Android Studio, but I still get thousands of compile errors ... such as compileSdkVersion. What am I missing? Thank you....

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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244 views

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javascript - React rerendering list

I have a react page that has several components on it with a state that shows a modal. I dont want all the components in the ... <> <Card ...omitted properties </Card> </> ); };...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - How to move an object in Ellipse path in SwiftUI?

Ellipse Path i am trying to move an object in ellipse path. but i don't know correct way and i think it need some of ... 2pi*t/T); When A == B, the trajectory is a circumference...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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235 views

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sql - Returning rows with where and or clause not returning correct values

I have the following query, which is supposed to return [issued date] and [Date Made] according to the same where and ... way I have implemented the or clause ? (See data below)...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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471 views

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求教怎么更改微信小程序中app.js的 globalData 属性、值？

app.js中其中的globalData中的userInfont属性、值要怎么设置和改变？求教高手、大虾们...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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345 views

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React里面的这个bind(this)是什么意思？

求详解。。...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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312 views

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mysql boolean型无法插入true

mysql设置boolean型会转为tinyint(1) 在我本地的mysql上，我插入一个true，会自动转为1，插入到数据库，但是在我服务器上却不行。不知道是版本问题还是配置问题，请教一下大神...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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126 views

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nodejs连接mysql,输入指令为什么

数据库名：suoxh，表格名：user 为什么已经连接成功，结束成功，但是写入node指令连接操作不了，中间代码不对吗？老是日志打印err；换了其他指令比如插入数据等也不行求各路大神指点啊，搞了一晚上了，查不出来啊...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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478 views

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hexo搭建个人博客如何设置自定义的页面为主页

RT 目前hexo搭建的个人博客是文章列表，想要自定义首页，不知道如何设置？求大神解答...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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167 views

1 answer

html网站name有什么用

name标签有什么用啊，可以不打吗，感觉没在网页中起作用啊...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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443 views

1 answer

饿了么elementui按需引入文问题

在使用vue配合webpack2打包时出现按需引入elementui组件找不到css样式文件,但是编绎是没有报错因为官方说法按需引入要使用.babelrc配制plugins选项 .babelrc配制如 ... use(Card) Vue.use(Form) Vue.use(Input) Vue.use(Checkbox) Vue.use(FormItem)...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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R reticulate package for sourcing python script - ModuleNotFoundError: No module named 'rpytools'

Background I have a Python script, pythonScript.py that I want to source via an R script, rScript.r. I use ... Related posts: Stack Overflow 1 Stack Overflow 2 Github Git memory...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.7k views

1 answer

blazor - Client MatBlazor matbutton could not find init (matblazor was undefined

I am trying to add MatBlazor to my WASM client and I am getting the error: blazor.webassembly.js:1 crit: Microsoft. ... .0. I must be missing a step or something. Suggestions?...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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486 views

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spring boot - How can I structure the following mongo collection into the redis cache?

I am using redis template and Jedis: Let's say I have the following sample document of a mongo collection: _id: ... by using it. Will it efficiently store my objects in Redis?...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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203 views

1 answer

多个多边形，求相交和补残角

如何求出各个四边形的个条线段。...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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335 views

1 answer

python - Recursive sum function (" UnboundLocalError: local variable referenced before assignment")

The simple recursive sum function. It is supposed to add all digits of a number. For example sum(123) = 1 + ... before assignment My question is why is the code not working?...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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288 views

1 answer

es6中静态变量

看书的时候看到，react为props提供了默认配置，通过defaultProps静态变量的方式来定义，请解释一下什么叫静态方法，有什么特性，然后同时问一下defaultProps在react中的使用...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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368 views

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angular - ng2-pdf-viewer latest version (6.3.2) is not working at 60.0.312 version of chrome

I am trying to use the latest version of ng2-pdf-viewer(6.3.2) component to display PDFs at chrome 60.0.312 version, but it is ... of ng2-pdf-viewer(6.3.2) at chrome (60.0.312)....

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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361 views

1 answer

amazon web services - How can I restore a snapshot to an existing Aurora db instance?

I redeployed an Auraro cluster (postgresql 11). I did it by delete the existing one and re-create a new one. ... sql script format. Then manually restore them to the new instance?...

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

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133 views

1 answer

javascript - Display different variables on a modal using PHP

I'm learning PHP and making a bidding website as a learning project. I've managed to get the properties from the database and ... class=well>sidebar</div> </div> </div>"; ?>...

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

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375 views

1 answer

如何解决Codeigniter3.x访问多级目录的控制器404问题？

如图，我想访问 controllers/admin/Home.php 中的Doecho类的index方法使用url 访问 localhost/index.php/admin/doecho 出现404 如何解决访问二级目录控制器404的问题呢? 控制器url调用规范都是遵循官方文档的...

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

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javascript - I can't create react apps! canvas related issues

My laptop is M1 macbook pro. The node version is 15.4.1. The npm version is 7.0.15. After I used this cmd npx create- ... canvas". But I have no idea how to solve it. Thanks a lot!...

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

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408 views

1 answer

安卓应用如何在整个应用运行期间都禁止弹出输入法面板？

最近有个项目是没有触摸的，外接的16键硬件键盘，但EditText在获取焦点时还是会弹出输入法。不想对每个EditText都设置监听处理。有没有更优雅的方法能让程序在运行期间都不会弹出输入法？最好是只要配置一下AndroidManifest.xml或者在Application里面运行一段代码。...

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

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275 views

1 answer

markdown代码高亮显示

如何让我写在博客中的html代码高亮显示？（hexo + github自己搭建的博客）...

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

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377 views

1 answer

react中路由参数的获取时机

react中，用了react-router，那么这时到的路由参数是在组件生命周期的哪个阶段可以获取到的？下面有两个情景，情景一：直接在浏览器地址栏输入https://segmentfault.com/ask，那么参数就是ask，那么这个ask作为路由参数可 ... 现是不一样的，有初步的结论，但是不太清楚为什么，也不知道自己想的对不对，请各位大神解答一下...

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

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337 views

1 answer

javascript - Fade out old flash message before fading in new one?

I am new to jquery. I have a form which performs a calculation, and returns the result in a flash message. My goal behavior ... (2500); }); }); CSS #diagnosis { display:none; }...

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

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452 views

1 answer

python - Extracting the data frame of last 30 days from the last available date in the data frame

I see that finding the last 30 days of the dataframe by import datetime days30=df[df.Date > datetime.datetime.now ... last available date with out making date as index if possible?...

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

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549 views

1 answer

flask中在模板中使用current_user.is_authenticated，运行报错，提示没定义

flask中在模板中使用current_user.is_authenticated，运行报错，提示没定义报错信息 Traceback (most recent call last): File ... (obj, attribute) jinja2.exceptions.UndefinedError: 'current_user' is undefined...

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

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