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CSS 单位 - vh/vw 和 % 之间有什么区别? - CSS Units - What is the difference between vh/vw and %?

问题: I just learned about a new and uncommon CSS unit.我刚刚了解了一个新的和不常见的 CSS 单元。 vh and vw measure the percentage of height and width of the viewport respectiv...

got
4分钟前
0
git pull 上的 Git 错误(无法更新本地引用) - Git error on git pull (unable to update local ref)

问题: I only have branch master and im getting this error every time i try to "git pull":我只有分支主并且每次尝试“git pull”时都会收到此错误: error: Couldn't set refs/remotes...

git
32分钟前
0
相当于flutter中的wrap_content和match_parent? - The equivalent of wrap_content and match_parent in flutter?

问题: In Android match_parent and wrap_content are used to resize the widgets automatically relative to their parent to the content the widget contains.在 Android 中, match_pa...

如何解决:“keyWindow”在 iOS 13.0 中已弃用 - How to resolve: 'keyWindow' was deprecated in iOS 13.0

问题: I'm using Core Data with Cloud Kit, and have therefore to check the iCloud user status during application startup.我在 Cloud Kit 中使用 Core Data,因此必须在应用程序启动期...

NHibernate ISession Flush: Where and when to use it, and why?

问题: One of the things that get me thoroughly confused is the use of session.Flush ,in conjunction with session.Commit , and session.Close . 令我彻底混淆的一件事是使用session...

ASP.NET身份DbContext混淆 - ASP.NET Identity DbContext confusion

问题: A default MVC 5 App comes with this piece of code in IdentityModels.cs - this piece of code is for all the ASP.NET Identity operations for the default templates: 默认的M...

“304 未修改”究竟是如何工作的? - How does “304 Not Modified” work exactly?

问题: How are "304 Not Modified" responses generated? “304 Not Modified”响应是如何生成的? How does a browser determine whether the response to an HTTP request is 304?浏览器如...

今天 14:41
0
是否有必要编写HEAD,BODY和HTML标签? - Is it necessary to write HEAD, BODY and HTML tags?

问题: Is it necessary to write <html> , <head> and <body> tags? 是否有必要编写<html> , <head>和<body>标签? For example, I can make such a page: 例如,我可以制作这样一个页面:...

Destroy和Delete之间的区别 - Difference between Destroy and Delete

问题: What is the difference between 有什么区别 @model.destroy and @model.delete @model.destroy和@model.delete For example: 例如: Model.find_by(col: "foo").destroy_all //and ...

今天 12:00
0
R中是否存在三元运算符? - Does the ternary operator exist in R?

问题: As the question asks, is there a control sequence in R similar to C's ternary operator ?正如问题所问,R 中是否有类似于 C 的三元运算符的控制序列? If so, how do you use it...

今天 11:05
0
如何更改 Django 应用程序的名称? - How to change the name of a Django app?

问题: I have changed the name of an app in Django by renaming its folder, imports and all its references (templates/indexes).我通过重命名其文件夹、导入及其所有引用(模板/索引)...

今天 10:19
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在 VIM 中打开一个缓冲区作为垂直分割 - Open a buffer as a vertical split in VIM

问题: If you are editing a file in VIM and then you need to open an existing buffer (eg from your buffer list: :buffers ) how can you open it in a vertical split?如果你在 VIM ...

今天 07:32
0
Django模型表单对象的自动创建日期? - Automatic creation date for Django model form objects?

问题: What's the best way to set a creation date for an object automatically, and also a field that will record when the object was last updated?自动设置对象的创建日期以及记录对...

今天 05:31
0
Should I use .done() and .fail() for new jQuery AJAX code instead of success and error

问题: I have coded like this:我已经这样编码了: $.ajax({ cache: false, url: "/Admin/Contents/GetData", data: { accountID: AccountID }, success: function (data) { $('#CityID').h...

今天 02:59
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如何将表格转换为数据框 - How to convert a table to a data frame

问题: I have a table in R that has str() of this:我在 R 中有一个表,其中包含str() : table [1:3, 1:4] 0.166 0.319 0.457 0.261 0.248 ... - attr(*, "dimnames")=List of 2 ..$ x: ...

今天 02:58
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在 SQL Server 2008 R2 中重命名数据库时出错 - Error on renaming database in SQL Server 2008 R2

问题: I am using this query to rename the database:我正在使用此查询重命名数据库: ALTER DATABASE BOSEVIKRAM MODIFY NAME = [BOSEVIKRAM_Deleted] But it shows an error when excuti...

今天 02:07
0
获取在 Laravel 中执行的查询 3/4 - Get the Query Executed in Laravel 3/4

问题: How can I retrieve the raw executed SQL query in Laravel 3/4 using Laravel Query Builder or Eloquent ORM?如何使用 Laravel Query Builder 或 Eloquent ORM 在 Laravel 3/4 中检...

将值附加到查询字符串 - Append values to query string

问题: I have set of URL's similar to the ones below in a list我有一组类似于下面列表中的 URL http://somesite.com/backup/lol.php?id=1&server=4&location=us http://somesite.com/bac...

php
今天 01:21
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如何删除列表中的最后一项? - How to delete last item in list?

问题: I have this program that calculates the time taken to answer a specific question, and quits out of the while loop when answer is incorrect, but i want to delete the last ...

昨天 14:17
6
哪些浏览器支持<script async =“async”/>? - Which browsers support <script async=“async” />?

问题: On December 1, 2009, Google announced support for asynchronous Google Analytics tracking . 2009年12月1日,Google宣布支持异步Google Analytics跟踪 。 The asynchronous track...

昨天 14:01
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