OStack Q&A-Knowledge Sharing Community

0 votes

251 views

1 answer

python - 如何复制字典并仅编辑副本(How to copy a dictionary and only edit the copy)

Can someone please explain this to me? (有人可以向我解释一下吗？)This doesn't make any sense to me. (这对我来说毫无意义 ) I copy ... ': 'WHY?!', 'key1': 'value1'} ask by MadSc13ntist translate from so...

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

0 votes

398 views

1 answer

python - 访问dict键，如果不存在，则返回None(Access dict key and return None if doesn't exist)

In Python what is the most efficient way to do this: (在Python中，最有效的方法是：) my_var = some_var['my_key'] | None ie. ( ... 包含'my_key'否则使my_var是None ) ask by 9-bits translate from so...

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

0 votes

399 views

1 answer

c++ - c + +选择排序在特定情况下不起作用(c++ Selection sort isn't working in specific cases)

I've created a program that uses selection sort to sort integers in an array. (我创建了一个使用选择排序对数组中的整数进行排序的程序 )In ... } return 0; } ''' (''') ask by macb2001 translate from so...

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

0 votes

429 views

1 answer

sql-server-2008 - 如何连接到SQL Server 2008 Express的本地实例(How to connect to local instance of SQL Server 2008 Express)

I just installed SQL Server 2008 Express on my Vista SP1 machine. (我刚刚在Vista SP1计算机上安装了SQL Server 2008 Express )I previously had ... 录-安装时是否可能设置了错误？) ask by Rob translate from so...

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

0 votes

289 views

1 answer

javascript - 上载图像之前预览图像(Preview an image before it is uploaded)

I want to be able to preview a file (image) before it is uploaded. (我希望能够在上传文件之前预览文件（图像） )The preview action should be ... I do this? (我怎样才能做到这一点？) ask by Simbian translate from so...

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

0 votes

238 views

1 answer

git - 是否进行“ git导出”（如“ svn导出”）？(Do a “git export” (like “svn export”)?)

I've been wondering whether there is a good "git export" solution that creates a copy of a tree without the .git repository ... 义，选项2似乎更好 ) ask by Greg Hewgill translate from so...

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

0 votes

442 views

1 answer

linux - 为文件的每一行运行脚本(Run script for each line of a file)

I'm creating a litle script to run some command on all OpenVZ containers inside a node. (我正在创建一个litle脚本，以在节点内的 ... .d/mysqld start </dev/null done ask by jmginer translate from so...

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

0 votes

468 views

1 answer

java - PreferenceFragment.findPreference始终返回NULL(PreferenceFragment.findPreference always returns NULL)

I'm currently trying to make a settings menu, that will show a MultiSelectListPreference , to select multiple contacts from ... 题吗？) ask by Wesley De Keirsmaeker translate from so...

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

0 votes

480 views

1 answer

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)

0 votes

240 views

1 answer

c# - 选定区域的Tab键顺序(Tab Order With Selected Area)

During Design Time of a Windows Form there are a lot of controls to assign their Tab Order with VS Tab Order Button automatically ... 看到要单击的相关控件 ) ask by BirSoft translate from so...

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

0 votes

354 views

1 answer

java - 是清单 <Dog> List的子类 <Animal> ？为什么Java泛型不是隐式多态的？(Is List<Dog> a subclass of List<Animal>? Why are Java generics not implicitly polymorphic?)

I'm a bit confused about how Java generics handle inheritance / polymorphism. (我对Java泛型如何处理继承/多态感到困惑 ) Assume the following ... 但是当涉及泛型时，必须指定它？) ask by froadie translate from so...

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

0 votes

517 views

1 answer

css - 是否有一个“先前的兄弟”选择器？(Is there a “previous sibling” selector?)

The plus sign ( + ) is for the next sibling. (加号（ + ）用于下一个兄弟姐妹。) Is there an equivalent for the previous sibling? (以前的兄弟姐妹有同等学历吗？) ask by Jourkey translate from so...

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

0 votes

227 views

1 answer

mysql - 如果我的表与其他表没有关系，这正常吗？(Is it normal if I have table with have no relationship with other tables?)

I have an existing application. (我有一个现有的应用程序 )Now my boss wants me to create a FAQ for apps usage documentation. (现在我的 ... not? (我的问题：这正常吗？) ask by plonknimbuzz translate from so...

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

0 votes

318 views

1 answer

r - R-递归查找子列表数(R - Recursively find number of sub lists)

I have a list of lists (let's call the main/parent list A). (我有一个列表列表（我们称其为主/父列表A） )The number of sub-lists in ... = 5 )Any thoughts? (有什么想法吗？) ask by GeoCat333 translate from so...

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

0 votes

211 views

1 answer

java - 什么（s.charAt（low）！= s.charAt（high））{“和” int high = s.length（）-1;(whats (s.charAt(low) != s.charAt(high)) {“ and ” int high = s.length() - 1;)

So I was learning to code using a textbook and suddenly it gave an example using loops and it used a lot of concepts ... a palindrome"); } } ask by Aishah Hamman translate from so...

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

0 votes

613 views

1 answer

visual-studio-code - 如何在vscode中运行C ++的所有测试用例(How to run all test cases of C++ in vscode)

I am looking for VSCode extension, that runs all the tests I have in my project in one click. (我正在寻找VSCode扩展，它可以一键运行我 ... are welcomed! (任何建议都欢迎！) ask by bubesh p translate from so...

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

0 votes

494 views

1 answer

vuejs2 - Nativescript Vue：列表数据相互混淆(Nativescript Vue: List data getting jumbled on top of each other)

I have a list of data and when it renders, it's rendering on top of each other. (我有一个数据列表，当它呈现时，它 ... /FlexboxLayout> </v-template> </RadListView> ask by ccMagnut translate from so...

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

0 votes

130 views

1 answer

java - 用Java对数组排序(Sort an array in Java)

I'm trying to make a program that consists of an array of 10 integers which all has a random value, so far so good. (我正在尝试制 ... ]+" " + array[9] ); } ask by Lukas translate from so...

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

0 votes

302 views

1 answer

git - 如何显示已上演的更改？(How do I show the changes which have been staged?)

I staged a few changes to be committed; (我上演了一些改变来承诺;)how can I see the diff of all files which are staged for the next ... 行，我可以创建一个别名，对吗？) ask by Frerich Raabe translate from so...

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

0 votes

164 views

1 answer

python - __init__.py的作用是什么？(What is __init__.py for?)

Python源目录中的__init__.py是什么？ ask by Mat translate from so...

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

0 votes

477 views

1 answer

java - 为什么将这两次相减（在1927年）会得出奇怪的结果？(Why is subtracting these two times (in 1927) giving a strange result?)

If I run the following program, which parses two date strings referencing times 1 second apart and compares them: ( ... .getDefault()): zh_CN ask by Freewind translate from so...

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

0 votes

377 views

1 answer

javascript - JSLint突然报告：使用“使用严格”功能形式(JSLint is suddenly reporting: Use the function form of “use strict”)

I include the statement: (我包括以下声明：) "use strict"; at the beginning of most of my Javascript files. (在我大多数Javascript文件的开头 ) ... be? (有谁知道函数形式是什么？) ask by Zhami translate from so...

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

0 votes

535 views

1 answer

php - cURL错误（58）：无法设置私钥文件：'/var/www/work/xml/keys/client.pem'类型PEM(cURL Error (58): unable to set private key file: '/var/www/work/xml/keys/client.pem' type PEM)

I am getting this error, while connecting to a server using private and public keys. (使用私钥和公钥连接到服务器时，出现此错误 ... ($data); } curl_close($ch); ask by Gajendra Bang translate from so...

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

0 votes

1.3k views

1 answer

react-native - 在React Native中更改目标元素的值(Change values of targeted element in React Native)

Using a functional component, I want to reach the targeted element I pressed and so interact/change the value of it. (使用功能组件 ... isC)}></View> ); }; ask by ehijon translate from so...

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

0 votes

506 views

1 answer

php - MVC：这是初始化和调用MVC层的正确顺序吗(MVC : Is this the correct sequence to initialize & invoke MVC layers)

I am trying to learn php MVC based webpage development.At first i literally thougt that it's just decoupling the ... 确实遵循MVC模式 ) ask by user5005768Himadree translate from so...

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

0 votes

341 views

1 answer

java - Java泛型实践的挑战[关闭](Challenges for java generics practice [closed])

Closed.) 关闭 )) This question is off-topic . 这个问题是题外话 ) It is not currently accepting answers. 它当前不接受答案 ) Want to improve ... 请在此处写下一些有趣的挑战-非常感谢！) ask by DmitriyS translate from so...

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

0 votes

243 views

1 answer

c++ - 在函数中返回数组(Return array in a function)

I have an array int arr[5] that is passed to a function fillarr(int arr[]) : (我有一个数组int arr[5]传递给函数fillarr(int arr[] ... 我返回了一个指针，我将如何访问它？) ask by Ismail Marmoush translate from so...

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

0 votes

277 views

1 answer

javascript - JavaScript中的null和undefined有什么区别？(What is the difference between null and undefined in JavaScript?)

我想知道JavaScript中null和undefined之间的区别。 ask by translate from so...

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

Categories

Recent questions

Just Browsing Browsing

Most popular tags