Recent questions in Technique[技术]

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795 views

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objective-c - Objective-C中的typedef枚举是什么？(What is a typedef enum in Objective-C?)

I don't think I fundamentally understand what an enum is, and when to use it. (我不认为我从根本上理解enum是什么，以及何时使用它 ) For ... declared here? (这里真的被宣布了什么？) ask by Craig translate from so...

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

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436 views

1 answer

python - 将对列表转换为最小的DataFrame表示形式？(Converting a list of pairs into smallest possible DataFrame representation?)

The bounty expires in 6 days) . 赏金将在6天后失效) ) Answers to this question are eligible for a +50 reputation bounty. 这个问题的答案有资 ... 像示例中一样，在同一列中定义每对 ) ask by Rob Rose translate from so...

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

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384 views

1 answer

perl - 自活甚至不能作为左值(Autovivification doesnt work even as lvalue)

I have this simple code: (我有这个简单的代码：) #!/usr/bin/perl @inp = map 2**$_, 0..6; @cc = grep { my $num = ... rules for autovivification? (自我生存的规则是什么？) ask by Herdsman translate from so...

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

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350 views

1 answer

javascript - 我可以隐藏HTML5号码输入的旋转框吗？(Can I hide the HTML5 number input’s spin box?)

Is there a consistent way across browsers to hide the new spin boxes that some browsers (such as Chrome) render for HTML ... ="test" type="number"> ask by Alan translate from so...

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

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654 views

1 answer

spring-boot - Spring Boot部署：在类路径资源中创建名称为'entityManagerFactory'的bean时出错(Spring boot deploy: Error creating bean with name 'entityManagerFactory' defined in class path resource)

I try deploy my spring boot web application to AWS Elastic Beanstalk. (我尝试将Spring Boot Web应用程序部署到AWS ... spring.jpa.hibernate.ddl-auto=update spring.jpa.properties.hiberrnate.dial...

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

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351 views

1 answer

python - 如何使用pip升级所有Python软件包？(How to upgrade all Python packages with pip?)

Is it possible to upgrade all Python packages at one time with pip ? (是否可以通过pip一次升级所有Python软件包？) Note : that there is ... 官方问题追踪器上对此功能有要求 ) ask by thedjpetersen translate from so...

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

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424 views

1 answer

linux - 如何终止在Linux中特定端口上运行的进程？(How to kill a process running on particular port in Linux?)

I tried to close the tomcat using ./shutdown.sh from tomcat /bin directory. (我试图使用tomcat /bin目录中的./shutdown.sh关闭tomcat )But ... 的列表，以便选择要杀死的进程 ) ask by veer7 translate from so...

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

0 votes

342 views

1 answer

bash - 将参数传递给Bash函数(Passing parameters to a Bash function)

I am trying to search how to pass parameters in a Bash function, but what comes up is always how to pass parameter from the ... 如何将参数传递给我的函数？) ask by stivlo translate from so...

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

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313 views

1 answer

mysql - 如何在SQL数据库表中选择第n行？(How to select the nth row in a SQL database table?)

I'm interested in learning some (ideally) database agnostic ways of selecting the n th row from a database table. (我有兴趣学习一些（ ... 可以引用的任何链接吗？) ask by Charles Roper translate from so...

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

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256 views

1 answer

java - LINQ的Java等效项是什么？ [关闭](What is the Java equivalent for LINQ? [closed])

LINQ的Java等效项是什么？ ask by Ahmed translate from so...

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

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280 views

1 answer

x86 - 使用GDB读取MSR(Using GDB to read MSRs)

Is there some way to read the x86-64 model-specific registers, specifically IA32_FS_BASE and IA32_GS_BASE, while debugging a program ... 是同样可以理解 ) ask by shigoel translate from so...

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

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558 views

1 answer

java - 我有一个arraylist，它的大小为1，但是当我到达索引0时，我得到= java.lang.IndexOutOfBoundsException：索引：0，大小：0(I have an arraylist and its size is 1, but when i get at index 0, i get = java.lang.IndexOutOfBoundsException: Index: 0, Size: 0)

@Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { VideoTask ... 么回事？) ask by Hamizul Fuad translate from so...

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

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272 views

1 answer

javascript - 为什么在数组迭代中使用“ for…in”是个坏主意？(Why is using “for…in” with array iteration a bad idea?)

I've been told not to use for...in with arrays in JavaScript. (有人告诉我不要将for...in用于JavaScript for...in的数组。)Why not? (为什么不？) ask by lYriCAlsSH translate from so...

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

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379 views

1 answer

c - 每n秒更改一次PID的程序(Program that changes PID every n seconds)

This question was migrated from Super User because it can be answered on Stack Overflow. 此问题已从超级用户迁移，因为可以在堆栈溢出中回 ... (0); } return 0; } ask by Hajar ELKOUMIKHI translate from so...

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

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274 views

1 answer

python - BeautifulSoup Find定期返回无(BeautifulSoup Find periodically returns None)

I am trying to get a value from a class. (我试图从课堂上获得价值 )From time to time, find returns the value I ... text.split()[4] print(item_count) ask by Nikita Biryukov translate from so...

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

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205 views

1 answer

c# - 何时使用struct？(When to use struct?)

When should you use struct and not class in C#? (什么时候应该在C＃中使用struct而不是class？)My conceptual model is that structs are used ... 结构在语义上意味着什么？) ask by Alex Baranosky translate from so...

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

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335 views

1 answer

memory-management - 什么是堆栈和堆？(What and where are the stack and heap?)

Programming language books explain that value types are created on the stack , and reference types are created on the heap , ... 是什么使速度更快？) ask by mattshane translate from so...

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

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440 views

1 answer

postgresql - 如何将CSV文件数据导入PostgreSQL表？(How to import CSV file data into a PostgreSQL table?)

如何编写一个存储过程，该存储过程从CSV文件导入数据并填充表？ ask by vardhan translate from so...

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

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495 views

1 answer

python - 如何在python中发送原始以太网帧？(How do I send a raw ethernet frame in python?)

I need to have a project done in a few days, its a basic client and server interface. (我需要在几天内完成一个项目，它是基本的客户端和服务器界面 ) ... 将不使用任何其他模块，而必须使用套接字 ) ask by Noah Koster translate from so...

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

0 votes

203 views

1 answer

python - 在virtualenv中使用Python 3(Using Python 3 in virtualenv)

Using virtualenv , I run my projects with the default version of Python (2.7). (使用virtualenv ，我使用默认版 ... with this system or executable ask by Prometheus translate from so...

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

0 votes

459 views

1 answer

python - ImportError：没有名为请求的模块(ImportError: No module named requests)

Whenever I try to import requests , I get an error saying No module Named requests . (每当我尝试导入requests ... ImportError: No module named requests ask by user2476540 translate from so...

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

0 votes

291 views

1 answer

java - 如何为LinkedList的浅/深副本执行Junit(how to do Junit for shallow/deep copy of LinkedList)

hello there i did the deep copy and the shallow copy is suggested by the user AndyMan and now i did the ... the reference return temp; } ask by studentaccount4 translate from so...

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

0 votes

248 views

1 answer

javascript - 将数组转换为JSON(Convert array to JSON)

I have an Array var cars = [2,3,..] which holds a few integers. (我有一个数组var cars = [2,3,..] ，其中包含一些整数 )I've ... for sending? (如何将其转换为JSON对象进行发送？) ask by dotty translate from so...

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

0 votes

439 views

1 answer

r - 如何在不丢失信息的情况下将因子转换为整数\数字？(How to convert a factor to integer umeric without loss of information?)

When I convert a factor to a numeric or integer, I get the underlying level codes, not the values as numbers. (当我将因子转换为数字或整数时， ... 好的方法可以将因子转换为数值？) ask by Adam SO translate from so...

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

0 votes

518 views

1 answer

php - 为foreach（）提供了无效的参数(Invalid argument supplied for foreach())

It often happens to me to handle data that can be either an array or a null variable and to feed some foreach with these data ... ) (其他（请建议）) ask by Roberto Aloi translate from so...

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

0 votes

316 views

1 answer

reactjs - Redux是否与React和React本机相同？(Is Redux the same for React and React native?)

I am currently studying RN by myself, without prior knowledge in React. (我目前正在独自学习RN，而没有React的先验知识 )A lot of things seem to ... 可以使用的资源以及与之无关的资源 ) ask by Tsabary translate from so...

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

0 votes

490 views

1 answer

laravel - 我们可以通过route（）方法从刀片传递请求吗？(Can we pass post request via route() method from blade?)

Rephrasing Question : I know how it works via form, i've been looking that if there is any way we can send " ... , $parameters, $absolute); } } ask by Vipertecpro translate from so...

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

0 votes

364 views

1 answer

python - numpy矩阵的有效着色值？(Efficient colorization of numpy matrix by value?)

I have a numpy ndarray that looks something like: (我有一个看起来像的numpy ndarray：) [[0, 0.25, 1, ...., 0.5, 0.23 ], [0. ... pretty nasty: (当前算法的输出看起来很讨厌：) ask by amirpc translate from so...

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

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