Recent questions in Technique[技术]

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macos - 如何在Mac OS X上启动PostgreSQL服务器？(How to start PostgreSQL server on Mac OS X?)

FINAL UPDATE: (最终更新：) I had forgotten to run the initdb command. (我忘了运行initdb命令 ) < /FINAL UPDATE> (</ FINAL UPDATE ... 运行吗？ )message. (信息 ) ask by community wiki translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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398 views

1 answer

html - 如何在没有id或class的输入字段中添加CSS？(How to add css to a input field without id or class?)

I need to add css to input field. (我需要将CSS添加到输入字段 ) Using this npm package material-ui-search-bar in react app. (在 ... color. (我需要输入文本为白色 ) ask by vikas95prasad translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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431 views

1 answer

http - 如何在HTTP POST请求中发送参数？(How are parameters sent in an HTTP POST request?)

In an HTTP GET request, parameters are sent as a query string : (在HTTP GET请求中，参数作为查询字符串发送：) http://example.com/page ... look like? (它是什么样子的？) ask by Camilo Martin translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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216 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 Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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302 views

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javascript - 为什么parseInt（1 / 0,19）返回18？(Why does parseInt(1/0, 19) return 18?)

I have an annoying problem in JavaScript. (我在JavaScript中遇到了烦人的问题 ) > parseInt(1 / 0, 19) > 18 Why does the parseInt ... 18 ? (为什么parseInt函数返回18 ？) ask by cebor translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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438 views

1 answer

python - python pygame暂停功能(python pygame pause function)

I am beginner and have a problem with my code. (我是新手，我的代码有问题 )Here you can see a short excerpt of my code. ... == pygame.K_p: pause = True ask by Rezan Yilmaz translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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306 views

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python - Python – Simplex为原始和对偶返回不同的值(Python – Simplex returning different values for the primal and the dual)

I'm currently working on an implementation of the optimal transport problem using the simplex algorithm in Python ... print(objective_result_dual) ask by MKpls translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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353 views

1 answer

python - 同时跟踪多个小部件中的鼠标移动(Track mouse movements in several widgets at the same time)

I would like to track the mouse movement for calculation (of values for progress bars) while the mouse is used to ... <connections/> </ui> ask by Atalanttore translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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469 views

0 answers

javascript - 什么时候在JavaScript中使用双引号或单引号？(When to use double or single quotes in JavaScript?)

console.log("double"); vs console.log('single'); (vs console.log('single');) I see more and more JavaScript libraries out ... 认为它们几乎可以互换 ) ask by community wiki translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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300 views

1 answer

javascript - 在React JSX内部循环(Loop inside React JSX)

I'm trying to do something like the following in React JSX (where ObjectRow is a separate component): (我正在React JSX尝试执行以下操作（ ... 上述目标（多次添加组件） ) ask by Ben Roberts translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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477 views

1 answer

css - 如何删除文本/输入框周围的焦点边框（轮廓）？（Chrome）[重复](How to remove focus border (outline) around text/input boxes? (Chrome) [duplicate])

This question already has an answer here: (这个问题在这里已有答案：) How to remove the border highlight on an input text element ... 160px; color: #CCC; } ask by Joey Morani translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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973 views

1 answer

python-3.x - ValueError：无法将float NaN转换为整数(ValueError: cannot convert float NaN to integer)

I am writing a function that returns a dictionary with the year of the docs as key and, as value, it specifies a tuple ... in advance (先感谢您) ask by Lisa Siurina translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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405 views

1 answer

c# - 为什么不从列表继承 <T> ？(Why not inherit from List<T>?)

When planning out my programs, I often start with a chain of thought like so: (在计划程序时，我通常会像这样思考：) A football team is ... 是否从List<T>继承时必须考虑什么？) ask by Superbest translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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239 views

1 answer

mysql - 将MySQL转换为SQlite(Convert MySQL to SQlite)

是否可以在Windows上使用免费工具将MySQL转换为SQLite？ ask by mullek translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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340 views

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mysql - 我如何找到MySQL my.cnf位置(How do I find the MySQL my.cnf location)

是否有MySQL命令来定位my.cnf配置文件，类似于PHP的phpinfo()如何定位其php.ini ？ ask by robinmag translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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189 views

1 answer

javascript - JavaScript中的SecureRandom？(SecureRandom in JavaScript?)

JavaScript中是否有类似SecureRandom.hex()的（ruby）函数为我生成随机哈希？ ask by Tronic translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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506 views

1 answer

javascript - 如何检查变量是否是JavaScript中的数组？ [重复](How do you check if a variable is an array in JavaScript? [duplicate])

This question already has an answer here: (这个问题在这里已有答案：) How to check if an object is an array? (如何检查对象是否是数组？) ... can be done? (这是最好的办法吗？) ask by Andy McCluggage translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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836 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 Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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238 views

1 answer

php - PHP获得五分钟的最后增量(PHP Get last increment of five minutes)

I am looking to get the previous increment of five minutes from the current time... (我希望从当前时间获得之前的五分钟增量...) Lets say ... 这个问题的简单方法是什么？) ask by Jeffrey L. Roberts translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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253 views

1 answer

javascript - 页面加载后如何使JavaScript执行？(How to make JavaScript execute after page load?)

I'm executing an external script, using a <script> inside <head> . (我正在使用<head>内的<script>执行外部脚本 ) Now since the script ... 可以钩住的事件会在页面加载时触发？) ask by Robinicks translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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402 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 Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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410 views

1 answer

javascript - “严格使用”在JavaScript中有什么作用，其背后的原因是什么？(What does “use strict” do in JavaScript, and what is the reasoning behind it?)

Recently, I ran some of my JavaScript code through Crockford's JSLint , and it gave the following error: (最近，我通过Crockford的 ... 字符串还是将来使用？) ask by Mark Rogers translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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427 views

1 answer

git - 如何查看仅一个用户提交的git日志？(How can I view a git log of just one user's commits?)

使用git log ，如何按用户筛选，以便仅看到该用户的提交？ ask by markdorison translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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311 views

1 answer

php - 如何避免在PHP中回显字符65279？(How to avoid echoing character 65279 in php?)

I have encountered a similar problem described here (and in other places) - where as on an ajax callback I get a xmlhttp. ... 我该如何避免呢？) ask by Yuval A. translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

311 views

1 answer

javascript - 为什么setTimeout（fn，0）有时有用？(Why is setTimeout(fn, 0) sometimes useful?)

I've recently run into a rather nasty bug, wherein the code was loading a <select> dynamically via JavaScript. (我最近遇到了一个令人讨厌的错误 ... 可以避免出现什么浏览器问题？) ask by Dan Lew translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

254 views

1 answer

swift - Swift Beta性能：排序数组(Swift Beta performance: sorting arrays)

I was implementing an algorithm in Swift Beta and noticed that the performance was very poor. (我在Swift Beta中实现了一个算法，并注意到性能非 ... -O产生同样好的代码 ) ask by Jukka Suomela translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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540 views

1 answer

shell - 检查外壳脚本中是否存在目录(Check if a directory exists in a shell script)

什么命令可用于检查Shell脚本中是否存在目录？ ask by Grundlefleck translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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381 views

1 answer

mysql - 查找具有最高平均工资的部门的名称(Find the name of the department having the maximum average salary)

I tried with the following query to get department name but not achieving completely. (我尝试使用以下查询获取部门名称，但未完全实现 ) select ... ' (我猜输出应该是营销 ) ask by Yashaswini Ravi translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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