Recent questions in Technique[技术]

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480 views

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css - 如何在同一元素上组合背景图像和CSS3渐变？(How do I combine a background-image and CSS3 gradient on the same element?)

如何使用CSS3渐变作为background-color ，然后应用background-image以应用某种透光的纹理？ ask by Ronald translate from so...

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

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178 views

1 answer

c++ - <快于<=吗？(Is < faster than <=?)

I'm reading a book where the author says that if( a < 901 ) is faster than if( a <= 900 ) . (我正在读一本书，作者说if( a ... 生成的机器代码有关，以防万一 ) ask by Vinícius Magalh?es Horta translate from so...

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

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588 views

1 answer

python - 如何比较python中的两个列表并返回匹配项(How can I compare two lists in python and return matches)

I want to take two lists and find the values that appear in both. (我想获取两个列表并找到两者中出现的值 ) a = [1, 2, 3, 4, 5] b ... [5] , for instance. (例如，会返回[5] ) ask by tehryan translate from so...

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

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746 views

1 answer

markdown - 什么文件使用.md扩展名，我该如何编辑它们？(What file uses .md extension and how should I edit them?)

On GitHub, several projects have README.md files. (在GitHub上，有几个项目有README.md文件 )It seems like a simple format file to express ... 找到.md文件的介绍？) ask by Lai Yu-Hsuan translate from so...

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

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436 views

1 answer

html - 如何使用CSS Flexbox弯曲多个高度/尺寸的盒子(How to use CSS Flexbox to flex boxes of multiple heights/sizes)

I'm trying to use CSS flexbox to design a grid with an image in one div that will take up the full length of the parent div ... 于我制作的第一张图像的东西？) ask by iPhoneApple translate from so...

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

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112 views

1 answer

java - Java中的静态类(Static Classes In Java)

Is there anything like static class in java? (java中是否有类似static class东西？) What is the meaning of such a class. (这样的课是什 ... good for? (静态类有什么用？) ask by Kraken translate from so...

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

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352 views

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javascript - 使用JavaScript（jQuery或Vanilla）选中/取消选中复选框？(Check/Uncheck checkbox with JavaScript (jQuery or Vanilla)?)

如何使用JavaScript，jQuery或vanilla选中/取消选中复选框？ ask by lisovaccaro translate from so...

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

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

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426 views

1 answer

google-cloud-functions - Firebase日志错误FAILED_PRECONDITION代码9(Firebase Log error FAILED_PRECONDITION code 9)

I'm trying to make a firebase firestore function to send a notifications from device to device but when I deploy it I get ... 意味着什么？) ask by The Forgotten Warrior translate from so...

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

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472 views

1 answer

c - 如何在C中连接const / literal字符串？(How do I concatenate const/literal strings in C?)

I'm working in C, and I have to concatenate a few things. (我正在C语言中工作，我必须串联一些东西 ) Right now I have this: (现在我有这个 ... around that? (那么我该如何解决呢？) ask by The.Anti.9 translate from so...

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

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576 views

1 answer

c++ - 用于测试Collat??z猜想的C ++代码比手写汇编要快-为什么？(C++ code for testing the Collatz conjecture faster than hand-written assembly - why?)

I wrote these two solutions for Project Euler Q14 , in assembly and in C++. (我用汇编语言和C ++语言为Euler Q14项目编写了这两种 ... 平均501毫秒组合) @hidefromkgb asm avg 200 ms (@hidefromkgb asm平均200毫秒)...

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

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514 views

1 answer

javascript - 如何清除服务人员的缓存？(How to clear cache of service worker?)

So, I have an HTML page with service worker, the service worker cache the index.html and my JS files. (因此，我有一个带有服务程序的HTML页面，该 ... 缓存，我的用户将不知道页面是否已更新 ) ask by taek translate from so...

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

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461 views

1 answer

python - 检查Python列表项是否在另一个字符串中包含一个字符串(Check if a Python list item contains a string inside another string)

I have a list: (我有一个清单：) my_list = ['abc-123', 'def-456', 'ghi-789', 'abc-456'] and want to search for items that ... ? (那么，如何获取所有包含'abc' ？) ask by SandyBr translate from so...

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

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177 views

1 answer

android - 实例化新的Android片段的最佳做法(Best practice for instantiating a new Android Fragment)

I have seen two general practices to instantiate a new Fragment in an application: (我已经看到了两种在应用程序中实例化新Fragment的常规做法： ... practice? (还是只是好的做法？) ask by Graham Smith translate from so...

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

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454 views

1 answer

linux - Chmod 777到一个文件夹和所有内容[重复](Chmod 777 to a folder and all contents [duplicate])

This question already has an answer here: (这个问题在这里已有答案：) How do I change permissions for a folder and all of its ... .htaccess. (我猜是通过.htaccess ) ask by RSM 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

windows - 从Windows控制台运行cURL命令(Run cURL commands from Windows console)

有没有办法在Windows中安装cURL才能从命令提示符运行cURL命令？ ask by DomingoSL translate from so...

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

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363 views

1 answer

string - 在Bash中提取子字符串(Extract substring in Bash)

Given a filename in the form someletters_12345_moreleters.ext , I want to extract the 5 digits and put them into a variable. (给定 ... 同方式非常感兴趣 ) ask by Berek Bryan translate from so...

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

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414 views

1 answer

r - 多列频率表是否存在循环以生成条形图？(Is there a loop for frequency table of multiple columns to generate bar plots?)

I have the following data: (我有以下数据：) df1<-read.table(text="Class1 Class2 Class3 M1 M2 M3 Z1 Z2 Z3 C E D Apple Apple ... 先映射变量，然后使用lappy运行这些图 ) ask by User20100 translate from so...

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

0 votes

349 views

1 answer

c++ - 使用AVX2指令向左移128位数字(left shift of 128 bit number using AVX2 instruction)

I am trying to do left rotation of a 128 bit number in AVX2. (我正在尝试在AVX2中向左旋转128位数字 )Since there is no direct method of ... (任何帮助将不胜感激，并在此先感谢 ) ask by krishnan translate from so...

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

0 votes

382 views

1 answer

html - 无论单元格中的文本数量是多少，都将表格列宽设置为常量？(Set the table column width constant regardless of the amount of text in its cells?)

In my table I set the width of the first cell in a column to be 100px . (在我的表中，我将列中第一个单元格的宽度设置为100px ) ... this expansion? (我怎么能禁用这个扩展？) ask by Misha Moroshko translate from so...

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

0 votes

157 views

1 answer

android - 附带数据库的应用程序(Ship an application with a database)

If your application requires a database and it comes with built in data, what is the best way to ship that application? (如果 ... 文档指针将不胜感激 ) ask by Heikki Toivonen translate from so...

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

0 votes

436 views

1 answer

android - Android Studio中的“无法解析符号R”(“cannot resolve symbol R” in Android Studio)

Want to improve this post?) 想要改善这篇文章吗？)) Provide detailed answers to this question, including citations and an explanation of why ... 想知道是什么原因造成的 ) ask by ez4nick translate from so...

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

0 votes

478 views

1 answer

javascript - 将下划线sortBy转换为Javascript(Convert underscore sortBy to javasscript)

I have an array which was sorted using Underscore's array function _.sortBy() , which I need to convert it into a ... )中看到红色下划线) ask by Yashwardhan Pauranik translate from so...

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

0 votes

386 views

1 answer

javascript - 反应：页面加载后第一次导航时，location.state是未定义的(React: location.state is undefined on first time navigating after page load)

I have a React component, which display a Link: (我有一个React组件，它显示一个链接：) Magic.tsx: (Magic.tsx：) const { message } = ... 显示了该链接附加了什么message状态 ) ask by Rahul Sagore translate from so...

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

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549 views

0 answers

javascript - 如何在JavaScript中修剪String中的文件扩展名？(How to trim a file extension from a String in JavaScript?)

For example, assuming that x = filename.jpg , I want to get filename , where filename could be any file name (Let's assume the ... 是一个函数并进行字符检查 ) ask by ma11hew28 translate from so...

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

0 votes

195 views

1 answer

javascript - 文件上传时如何编辑CSS(How to edit css when file is uploaded)

I have a form where users can upload a file. (我有一个表单，用户可以在其中上传文件 ) The uploading and validation afterwards (filesize, ... (我将如何最轻松地做到这一点？) ask by Daiaiai translate from so...

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

0 votes

149 views

1 answer

javascript - HTML / JavaScript更改div内容(HTML/Javascript change div content)

I have simple HTML code with some javascript, it looks like: (我有一些JavaScript的简单HTML代码，如下所示：) <html> <head> <script type="text ... 性 value ，所以我问它如何完成 ) ask by Rob translate from so...

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

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448 views

1 answer

javascript - 尝试将工作表行数据发送到GmailApp时缺少变量名； Javascript / Google App脚本(Missing variable name while trying to send sheet row data to GmailApp; Javascript/Google App script)

Still on a learning curve here. (这里仍然处于学习曲线上 ) I am trying to get data from a google sheet and send the data Gmail app ... details: " + data()); } } } ask by levi translate from so...

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

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