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469 views

1 answer

node.js - 每次运行npm install时，都会收到无关的警告/错误(Everytime I run npm install, I get the extraneous warning/error)

Every single package I install using npm i is extraneous and is not added to package.json. (我使用npm i安装的每个软件包都是多余的，并且不会 ... 使用节点8.10.0和npm 3.5.2) ask by littlezigy translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

307 views

1 answer

javascript - Nativescript-vue RadListView获取项目点击的项目(Nativescript-vue RadListView get item on item tap)

in mt nativescript-vue app I'm suing RadListView to show a list of review with loadOnDemand enabled, everything works ... scoped> </style> ask by gabogabans translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

302 views

1 answer

c - 套接字允许多个客户端(Sockets allow multiple clients)

I have very simple server and chat but i cant figure out how to allow multiple clients. (我有非常简单的服务器和聊天程序，但我不知道如何 ... for any help. (感谢您的帮助 ) ask by Kvikino translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

351 views

1 answer

c# - 将现有数据库复制到专用文件夹中(copy existing database in private folder)

i'm programing with Xamarin,and i need a way to put my database in /data/user/0/App1.App1/files/dvp.db (我正在使用Xamarin进行编程， ... 到这条路，也没有找到任何方法) ask by Boufous Otman translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

431 views

1 answer

reactjs - 子代卸载后，布局组件不会在服务器端卸载(layout component does not unmount on server side when children unmounted)

I use next.js. (我使用next.js )In my index route, according to "step" State, I render some component which has own ... ; }; export default Home; ask by Rahele Nazari translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

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227 views

1 answer

python - Python中的静态方法？(Static methods in Python?)

Python中是否可以有无需初始化类即可调用的静态方法，例如： ClassName.static_method() ask by Joan Venge translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

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285 views

1 answer

c# - 深度克隆对象(Deep cloning objects)

I want to do something like: (我想做类似的事情：) MyObject myObj = GetMyObj(); // Create and fill a new object MyObject newObj = ... 而不会在原始对象中反映任何更改？) ask by NakedBrunch translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

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281 views

1 answer

mysql - utf8_general_ci和utf8_unicode_ci有什么区别(What's the difference between utf8_general_ci and utf8_unicode_ci)

utf8_general_ci和utf8_unicode_ci ，在性能方面是否存在差异？ ask by KahWee Teng translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

351 views

1 answer

linq - LINQ相当于IEnumerable的foreach <T>(LINQ equivalent of foreach for IEnumerable<T>)

I'd like to do the equivalent of the following in LINQ, but I can't figure out how: (我想在LINQ中执行以下操作，但是我不知道如何操作：) ... is the real syntax? (真正的语法是什么？) ask by tags2k translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

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452 views

1 answer

linux - 如何在启动时运行shell脚本(How to run a shell script at startup)

On an amazon linux instance, I have two scripts called start_my_app and stop_my_app which start and stop forever (which in ... 但这对我start_my_app ) ask by meetamit translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

381 views

1 answer

php - MySQL查询字符串包含(MySQL query String contains)

I've been trying to figure out how I can make a query with MySQL that checks if the value (string $haystack ) in a ... (`column`, '{$needle}')=1 ask by arik translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

318 views

1 answer

python - Time.sleep（）影响python中上面的代码(Time.sleep() affecting the code above it in python)

I am making a KIVY program in python and have a time.sleep(3) in my code so that it waits three seconds before changing ... 但是time.sleep在它之后 ) ask by Apurv Pandey translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

377 views

1 answer

windows - 如何在Windows CMD的一行中运行两个命令？(How do I run two commands in one line in Windows CMD?)

I want to run two commands in a Windows CMD console. (我想在Windows CMD控制台中运行两个命令 ) In Linux I would do it like ... on Windows? (在Windows上如何完成？) ask by flybywire translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

486 views

1 answer

visual-studio - 您如何计算Visual Studio解决方案中的代码行？(How do you count the lines of code in a Visual Studio solution?)

Is it possible to find the number of lines of code in an entire solution? (是否可以在整个解决方案中找到代码行数？)I've heard of MZ-Tools ... (我听说过MZ-Tools ，但是有没有开源的？) ask by Fermin translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

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232 views

1 answer

javascript - 如何检查JavaScript中的空值？(How do I check for null values in JavaScript?)

How can I check for null values in JavaScript? (如何在JavaScript中检查空值？)I wrote the code below but it didn't work. (我在 ... ? (在JavaScript程序中如何找到错误？) ask by Mahdi_Nine translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

409 views

1 answer

ruby-on-rails - 尝试安装pg gem时找不到'libpq-fe.h标头(Can't find the 'libpq-fe.h header when trying to install pg gem)

I am using the Ruby on Rails 3.1 pre version. (我正在使用Ruby on Rails 3.1预版本 )I like to use PostgreSQL, but the problem ... problem? (我该如何解决这个问题？) ask by demonchand translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

192 views

1 answer

c# - CEFSharp-如何从内部版本75.1.143访问OnResourceResponse(CEFSharp - How can I access OnResourceResponse from build 75.1.143)

I have been having a murderous time with CEFSharp in WinForms since Visual Studio decided to update it to build 77.1.18 and Nuget ... 使它像更新前一样工作？) ask by oldcoder translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

438 views

1 answer

postgresql - 如何在psql中切换数据库？(How to switch databases in psql?)

In MySQL I used use database_name; (在MySQL中，我使用use database_name;) What's the psql equivalent? (什么是psql等效项？) ask by Blankman translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

226 views

1 answer

git - “下游”和“上游”的定义(Definition of “downstream” and “upstream”)

I've started playing with Git and have come across the terms "upstream" and "downstream". (我已经开始玩Git并遇到过上游和下游这两个词 )I' ... 理工具）和源代码的上下文中意味着什么？) ask by brendan translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

216 views

1 answer

python - Python的__init__和self是做什么的？(What __init__ and self do on Python?)

I'm learning the Python programming language and I've came across something I don't fully understand. (我正在学习Python编程语言，遇到了一些我不太了解 ... 认为它们可能是OOP构造，但我不太了解 ) ask by translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

432 views

1 answer

javascript - 如何以类似JSON的格式打印圆形结构？(How can I print a circular structure in a JSON-like format?)

I have a big object I want to convert to JSON and send. (我有一个大对象，想要转换为JSON并发送 )However it has circular structure. (但是它具有 ... 想将obj字符串化为：) {"a":"foo"} ask by Harry translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

352 views

1 answer

sql - 如何在表中找到价值百分比？(How to find percentage of value in table?)

I have a SQL table that contains some of the following data: (我有一个SQL表，其中包含以下一些数据：) ID Name Grade 54 ... 终输出类似于Name1：30％，Name2：40％，Name3：20％等...) ask by Ryan Lenz translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

448 views

1 answer

python - 如何对一组数据点进行重新排序以最大程度减少另一组数据点的错误(How to reorder one set of data points to minimize error with another set of data points)

I have the following set of 15 data points: (我有以下15个数据点集：) [0.287 , 0.0691, 0.856, 0.731, 0.895, 0.76, 0.496, 0.749, 0. ... ，然后看看哪一个给出的误差最小，但这将永远花费...) ask by bki translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

444 views

1 answer

flutter - 此函数的返回类型为“行”，但不以return语句结尾(This function has a return type of 'Row', but doesn't end with a return statement)

i am trying to retrieve data from firestore as dropdown list, got this tutorial and error show up, please help, totally new ... , ), )); } } ask by learnandro translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

338 views

1 answer

java - Java Hashmap：如何从价值中获取关键？(Java Hashmap: How to get key from value?)

If I have the value "foo" , and a HashMap<String> ftw for which ftw.containsValue("foo") returns true , how can I get the ... that? (最好的方法是什么？) ask by Nick Heiner translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

421 views

1 answer

php - 如何读取PHP中是否选中了复选框？(How to read if a checkbox is checked in PHP?)

如何读取PHP中是否选中了复选框？ ask by Thew translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

334 views

1 answer

linux - 如何在Linux / Unix上永久设置$ PATH？(How to permanently set $PATH on Linux/Unix?)

I'm trying to add a directory to my path so it will always be in my Linux path. (我试图将目录添加到我的路径，以便它始终位于我的Linux路 ... ? (我该如何做才能将其永久设置？) ask by Click Upvote translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

552 views

1 answer

vim - 将文本粘贴到vim时关闭自动缩进(Turning off auto indent when pasting text into vim)

I am making the effort to learn Vim. (我正在努力学习Vim ) When I paste code into my document from the clipboard, ... set smartindent set bg=dark set nowrap ask by Rimian translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

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