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android - How to open a dialog fragment immediately after new fragment navigation

I have a FragmentA and want to replace with FragmentB. Once navigated to FragmentB, I want to immediately open a ... see Fragment B Any ideas/solution to get above behaviour?thanks...

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

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el-image预览大图删除一张照片后预览无法显示

点击删除按钮后会报错并且预览无图片显示代码：  <el-upload action="#" :show-file-list="false" :auto-upload=" ... ) this.$set(this.imgPreview, this.imgPreview.splice(index, 1)) } } 求解，谢谢~...

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

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Flutter web Firebase Google Sign In not working

I've been working with Flutter for a while now, and today I decided to try Flutter web. I wanted to make a website ... on FirebaseAuthException catch (e) { return e.message; } } }...

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

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How to merge two datasets with common elements in column rows in R

I have 2 datasets, one with around 4000 and the other with about 1200 rows. I wanna merge these two by their Column A to have a ... 6L ), class = c("tbl_df", "tbl", "data.frame"))...

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

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本地代码调试接口的时候火狐没问题，谷歌chrome就有问题？

chrome火狐chrome版本火狐版本同一套代码为什么chrome的响应头会有一个set-Cookie httpOnly 请求头没有cookie字段导致接口401，但是火狐的响应头没有set-Cookie请求头有携带cookie所以没有出现401. 请求使用的是axios， withCredentials也设置为true了。什么原因？...

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

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python - How do you print out text with an embedded URL in jupyter notebook?

I have a dataframe with a news headline (scraped from a site) and corresponding URL that links to that story. How would one print out the text with the URL embedded in it?...

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

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java 注解写了这么多代码干嘛?

https://blog.csdn.net/su20145... 1. package com.susu; 3. import java.lang.annotation.ElementType; 4. import java.lang.annotation.Retention; ... 11. String value(); 写了这么多代码是为了架构设计？...

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

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关于DolphinDB与python的接口

请问DolphinDB的python接口，是在Python里调用DolphinDB进行查询操作等，然后在python进程中进行后续计算；还是把Python编译成数据库代码，使用内置的优化过的函数等再执行呀？...

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

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在react中，在一个页面定义一个a变量,然后在另一个页面是b变量,然后刷新页面是a还是b？为什么？

在react中，在一个页面定义一个a变量,然后在另一个页面是b变量,然后刷新页面是a还是b？为什么？...

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

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python - Substract rows in array without loops

How can I subtract two rows in python numpy? without using loops for example: import numpy as np x = np.array([[2.2, 3.4, 5.2], [1 ... ]]) # expected result: y = [[-1.2, 2., -0.2]]...

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

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javascript - Where and how many times to use ngInject

My angular application ran well in development. But in production there were build issues. The issues occurred since I ... there a place to declare it globally for all controllers?...

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

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1.9k views

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python - Extraction of Object Labels

I'm trying to detect objects inside my video sequences, but instead of outputting these 'burnt in' to the video file ... code can be found on Github here for reference. Thanks!...

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

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3.7k views

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ios - How to detect if notification is turn on when the app comes back from Settings in Swift 5?

I have a switch button that will trigger notification alerts. I was able to implement asking for Notification permission ( ... hope this make sense. Thank you for any suggestion....

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

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c# - ASP.NET MVC 4: Error received when trying to insert datetime field in Sql Server Database from input text box

I am working on a web application that will insert data into a row in a table when clicked. When I try to insert ... /script> <script type="text/javascript" src="http://ajax.cdnj...

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

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3.1k views

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vue-print如何打印pdf？

这个pdf是base64的数据，想把这个pdf打印出来要怎么做呢？（可以支持多个pdf数据打印）...

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

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3.6k views

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antd表单项非必填为空时获取的值为undefined？

如题，有没有什么办法能有效过滤掉所有非必填值为undefined的项，这些项有的在嵌套在第二层，有的在第三层？...

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

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3.6k views

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java 源码翻译成字节码空间是不是变大了？

像C++ 这种编译后文件比源码大很多，java 应该也是吧...

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

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3.6k views

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用wordpress搭建博客出现报错：pjax is not a function 博客文章无法点赞

pjax.js?version=1609941473:8 Uncaught TypeError: $(...).pjax is not a function at HTMLDocument.<anonymous> (pjax.js?version=1609941473:8) at j ( ... 博客文章无法点赞，小白求大神指导能远程帮助我就更好了 ...

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

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3.7k views

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sql - Mysql three table join group by each day

I have three tables, and each table has the same column information. So I want to join these three tables by their date. But If one of these ... 20/01/2021 | 0 | 0 | 0 | 0 | 0 | 0...

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

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WebSocket 推送数据频率很高，页面停留时间稍长了就会响应慢问题

RT，说明一下，接收的socket数据不会累加进数组，这样是不是说明js缓存不会累加，是浏览器缓存在累加，可以每隔一段时间清除一下浏览器缓存吗？...

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

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python - AttributeError at / 'Product' object has no attribute 'get_category_display'

hi I want in my products api show the name of category instead of showing category id . I wrote a function to do that ... = ('-created',) def __str__(self): return self.name...

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

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3.9k views

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swift - ARKit – Adding box to anchor?

I wanted to create a simple object (box) and display it at a position, but everything I can find is about using the ... the rect object to the anchor ? session.add(anchor: anchor)...

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

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前端拿到流文件转图片做显示这么做会有什么安全问题吗？

前端拿到流文件转图片做显示这么做会有什么安全问题吗？...

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

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3.7k views

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请问Ant design pro中如何实现页内跳转

比如下图中，点击“配置”，在左侧菜单选择不变的情况下，直接在该页面跳转出一个新的页面，用来填写配置信息，并且该页面能够后退，后退返回到查询表格页面...

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

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3.7k views

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machine learning - Pre-processing videos for recognizing activities

My dataset contains videos with varying length and frame rates (25 fps with max length of approx. 10 min). My goal ... which can be used for such a task Any suggestions ?...

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

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3.8k views

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useEffect监听ref报警告和use-deep-compare-effect的实现？

const changedRef = useRef<number>(0); useEffect(() => { console.log('<<<<<changedRef>>>>>>', changed); }, ... depsRef.current = deps; return useEffect(fn, [renderRef.current]); }...

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

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3.9k views

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javax.validation.Validator校验对象的时候，如何校验子对象？

Validator validator = Validation.byDefaultProvider().configure() .addProperty("hibernate.validator.fail_fast", "true") .buildValidatorFactory().getValidator ... 子对象的字段不会被校验，请问如何解决？...

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

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4.1k views

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sql - How to get six weeks data from a week column?

I have a legacy query in which I am looking data for six weeks as shown below. In my below AND condition I get data ... . Can I use day column here to get correct past six weeks?...

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

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