16892 Developer Q&A Community

asked Feb 5, 2021 in Others[杂七杂八] by ostack (1.4k points)

Welcome to Our Knowledge Sharing Community-Open, Learning,Share

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

java - “同步”是什么意思？(What does 'synchronized' mean?)

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236 views 1 answer

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

c# - 在Unity中的激活状态和Input.touch中设置故障(Glitch in the set active and Input.touch in Unity)

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436 views 1 answer

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

python - 从pandas DataFrame删除列(Delete column from pandas DataFrame)

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237 views 1 answer

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

julia - 朱莉娅（Julia）：如何有效计算Vector {Union {T，Missing}}中的遗失数量(Julia: How to count efficiently the number of missings in a `Vector{Union{T, Missing}}`)

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1.4k views 1 answer

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

json - Spark：为JSON字符串生成JSON模式(Spark: Generating JSON schema for a JSON string)

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627 views 1 answer

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

git - 将本地存储库分支重置为类似于远程存储库HEAD(Reset local repository branch to be just like remote repository HEAD)

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574 views 1 answer

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

cors - CORS和网络扩展(CORS and web extensions)

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659 views 1 answer

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

sql - 如何从薪资表中找到第三或第n个最高薪水？(How to find third or nth maximum salary from salary table?)

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448 views 1 answer

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

javascript - 在JavaScript控制台中包含jQuery(Include jQuery in the JavaScript Console)

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189 views 1 answer

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

css - Bootstrap4：访问变量？(Bootstrap4: Accessing variables?)

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281 views 1 answer

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

git - 如何撤消git reset --hard HEAD?1？(How can I undo git reset --hard HEAD~1?)

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428 views 1 answer

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

common-lisp - SBCL内置可执行文件：“尝试将插槽的值设置为XXX（SLOT-VALUE的SETF）时，对象缺少YYY插槽”？(SBCL Built executable: “When attempting to set the slot's value to XXX (SETF of SLOT-VALUE), the slot YYY is missing from the object”?)

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704 views 1 answer

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

ruby - 什么是Ruby中的attr_accessor？(What is attr_accessor in Ruby?)

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305 views 1 answer

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

javascript - 如何从JavaScript对象中删除属性？(How do I remove a property from a JavaScript object?)

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365 views 1 answer

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

java - 应用程式未在Android版本4.4.2（KITKAT）上执行，但在其他装置上运作良好(App not running on android version 4.4.2(KITKAT) but running fine on other devices)

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312 views 1 answer

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

python - Django DateTimeField和datetime.datetime.now（）提供不同的时间(Django DateTimeField and datetime.datetime.now() giving different times)

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392 views 1 answer

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

java - Java是“按引用传递”还是“按值传递”？(Is Java “pass-by-reference” or “pass-by-value”?)

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298 views 1 answer

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

mysql - MySQL错误代码：MySQL Workbench中UPDATE期间的1175错误代码(MySQL error code: 1175 during UPDATE in MySQL Workbench)

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386 views 1 answer

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

javascript - 如何检查可见DOM中是否存在元素？(How to check if element exists in the visible DOM?)

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374 views 1 answer

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

javascript - 我得到了网络响应，但是CORS不允许它进入(I'm getting the network response, but CORS is not allowing it to enter)

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454 views 1 answer

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

python - 块数组尺寸(Numpy array dimensions)

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320 views 1 answer

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

asp.net-core - 调用ASP.NET Core 2.1 API时获取401。这是CORS问题吗？(Getting 401 when calling ASP.NET Core 2.1 API. Is this a CORS issue?)

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472 views 1 answer

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

python - 如何检查变量的类型是否为字符串？(How to check if type of a variable is string?)

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292 views 1 answer

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

c++ - 为什么std :: iterator不包含std :: prev（）作为成员函数？(Why does std::iterator not contain std::prev() as a member function?)

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293 views 1 answer

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

javascript - 为什么我的JavaScript代码没有Postman时出现“在请求的资源上没有'Access-Control-Allow-Origin'标头”错误？(Why does my JavaScript code get a “No 'Access-Control-Allow-Origin' header is present on the requested resource” error when Postman does not?)

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589 views 1 answer

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

javascript - 如何遍历图像数组并在React组件中渲染它们？(How to loop over images array and render them in a component for React?)

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448 views 1 answer

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

amazon-web-services - 为React Native项目设置后端的最佳方法是什么？（对于初学者）[关闭](What is the best method for setting up a backend for a react native project? (for a beginner) [closed])

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533 views 1 answer

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

postman - 我们可以在使用POSTMAN时添加TLS版本1.2吗？(Can we add TLS version 1.2 while using POSTMAN?)

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1.3k views 1 answer

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