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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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1 answer

r - using facebook prophet for cross validation on months time period

I'm trying to do a time slice leave one out cross validation, i.e. backtesting on months with horizon 1 month on a daily ... 31, units = 'days', initial = 1 ) Thanks in advance!...

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

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547 views

1 answer

How do I install SSL? No Key or CA, Only CRT

I have a VPS with Apache2. I have installed SSL before in my websites, but always form freeSSL or ZeroSSL, they give ... to have SSL running for my Magento 2 installation to work....

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

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536 views

1 answer

DolphinDB中数据持久化的问题

使用场景：客户端开启两个python进程访问同一个DolphinDB的server端，假如我在python进程A中运行demo获得了一个处理过的table1，我想在进程B中直接使用这个处理过的table1，该如何在DolphinDB中实现？...

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

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354 views

1 answer

sql - Relation between tables (BD)

I have the following information from two tables (Categories and Subcategories) Note that in the Subcategories table, ... Thank you very much for any help and suggestions....

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

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421 views

1 answer

ios - What is the second parameter of NSLocalizedString()?

What is the *comment parameter in: NSString *NSLocalizedString(NSString *key, NSString *comment) If I do this: NSLocalizedString ... @"Hola Mundo"; Isn't the English one redundant?...

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

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620 views

1 answer

pm2项目无法启动，而且错误日志0b

pm2添加了项目，启动几秒就失败，但没有错误日志。。能请教一下问题在哪吗，之前删过重装了一次，然后就宝塔的文件上传也开始出问题，以前的error log也无法删除了。。。。（对不起太菜了，求大佬救狗命。。。### 问题描述...

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

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797 views

1 answer

antd - How to get a table of contents or mini vertical menu in ant design?

Is there anything in the documentation that gives you this style, that the documents themselves use? (highlited by the red ... ) The class name from the chrome console is toc-affix...

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

0 votes

576 views

1 answer

vb.net - Visual Basic needs single SQL data call for multiple dropdowns with same data

I'm trying to create a Visual Basic page that has multiple dropdown with the some set of data, but the data is called ... be nice, but it seems a little slow bringing up the page....

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

0 votes

803 views

1 answer

C语言程序设计题目

这一道题如何理解呢...

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

0 votes

1.6k views

1 answer

python 3.x - Pandas groupby => AttributeError: 'function' object has no attribute 'mean'

I try to compute the average size of a population composed of men and women: >>> import pandas as pd >>> ... size.mean() AttributeError: 'function' object has no attribute 'mean'...

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

0 votes

1.3k views

1 answer

WPF项目里调用selenium的exe程序，打包后安装失败，要怎么打包

debug，选择要执行的程序，就会用chrome driver打开WPF项目bin目录下对应的exe程序。我打包WPF项目，生成如下：安装exe，就报错了怎么打包才不会报错?...

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

0 votes

1.3k views

1 answer

el-date-picker日期时间选择器的时间样式设置无变化

el-date-picker日期时间选择器的默认组件中，修改年月日后的时间样式，已用样式穿透进行修改还是无任何变化 .processingTime>>>.el-time-panel { margin: 5px -100px; } 请问还有其他可实现的修改方式吗？...

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

0 votes

1.1k views

1 answer

关于js异步的问题

是否一般的函数执行就可以说是阻塞的，同步执行的？比如： const sync = function() { let a = 1 let b = 2 let c = 3 } 也即是说，在这3行赋值语句执行完成之前，函数外 ... ) { ... var a = 0 a = new_sync2() console.log(a)// will be 1 ... }...

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

0 votes

1.7k views

1 answer

django - Search by foreign key in admin

models.py class Supplier(models.Model): name = models.CharField(blank=True, max_length=50,) city = models. ... return an error : Related Field got invalid lookup: icontains...

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

0 votes

1.9k views

1 answer

javascript - Encrypting Files NodeJS ERRO: EVP_DecryptFinal_ex:wrong final block length

My Code: const encrypt = (buffer, key) => { // Create an initialization vector const iv = crypto.randomBytes(16); / ... useful, so hopefully you guys know what i have done wrong....

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

0 votes

1.7k views

1 answer

gpu - In WebGL or OpenGL is it bad to use an output fragment variable as temp storage?

Ignoring coding patterns and code clarity/quality: This is a question I just don't know if it's inherently bad or ... val = thing * something; ... gl_FragColor = val; }...

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

0 votes

1.7k views

1 answer

移动端微信公众号关闭一个h5页面，window.close()方法失效

移动端微信公众号打开一个h5页面a，在页面a通过window.open()方法打开页面b, 在b页面调用window.close()方法想关闭页面b，回到页面a，可是页面b关不掉。请问应该怎么操作？...

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

0 votes

1.6k views

1 answer

c++ - How does this compile in Arduino IDE?

I have noticed the following code, which is obviously invalid C++, compiles in Arduino IDE (using AVR-GCC): // The ... setup() function, how does it know it will be declared?...

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

0 votes

1.4k views

1 answer

ssrs 2012 - SQL - Returning the Top two Results for Each Match

I have a situation where we record every change to a column of a member record in the MEMBER table as a separate row. ... 9101 status Frozen 10/15/2020 9101 status Active 1/1/2020...

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

0 votes

1.8k views

1 answer

服务端渲染react-redux 报错 Invalid hook call. Hooks can only be called

### 问题描述 server error Error: Invalid hook call. ? Hooks can only be called inside of the body of a function component. ? This could happen for ... 解决服务端使用Redux的同构渲染问题问题已解决：解决方法看这里...

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

0 votes

1.6k views

1 answer

php - Custom redirections to make the cart page inaccessible in WooCommerce

I would like the WooCommerce cart page to be inaccessible. If a user is trying to reach the cart page when the cart ... cart is not empty, redirect to checkout. Is that possible?...

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

0 votes

1.6k views

1 answer

spring boot - WebFlux – Back-pressure – Limit # of concurrent requests

We have an applications that reads data from a database (using a reactive driver), transform it and pushes it to ... to execute async request to ES Thanks very much. Fernando....

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

0 votes

1.7k views

1 answer

compiler errors - ReactJS markdown editor component fails to render

I'm learning React at the moment, and I am currently trying out the Slate Markdown Editor in CodeSandbox. I am trying to initialize a ... ", "not ie <= 11", "not op_mini all" ] }...

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

0 votes

1.8k views

1 answer

fanotify文件实时监控无法使用gdb调试

fanotify FAN_MARK_MOUNT 模式，监控根路径，gdb fanotify监控程序时，ctrl+c ctrl+z 引起系统卡死，有人遇到过么？是否有解决办法？...

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

0 votes

2.0k views

1 answer

Secure API Key Google Maps Flutter Web

Currently, the package https://pub.dev/packages/google_maps_flutter_web allows to access the Maps api by providing the ... just replaces the variable with the api key value....

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

0 votes

1.8k views

1 answer

node 提示 “请求的操作需要提升”

如题，某天我打开自己的电脑运行项目的时候，弹出了一个警告--“the requested operation requires elevation”。如图所示：百度之后，发现是由于 node 没有权限，解决的办法多是--使用管理员权限运行 node 可是这样未免过于繁琐，也曾尝试过重装 node 然无卵用。。特来思否寻求答案。...

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

0 votes

1.7k views

1 answer

ruby on rails - Route constraint fatal

I tried writing my routes in these 3 ways but both of them result into a fatal error. I don't understand ... ) FrozenError: can't modify frozen #<Class:#<Array:0x0000000005853ce8>...

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

0 votes

1.6k views

1 answer

vue 为什么 created 拿不到路由的 query，beforeRouteEnter 可以拿到？

不知道为什么，求助。 created () { console.log(this.$route.query, '拿不到') }, beforeRouteEnter (to, form, next) { const { v = '1' } = to.query next(vm => { console.log(v, '有数据') }) }...

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

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