Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Login
Remember
Register
Ask
Q&A
All Activity
Hot!
Unanswered
Tags
Users
Ask a Question
No answer
No selected answer
No upvoted answer
Ask a Question
Categories
All categories
Topic[话题] (13)
Life[生活] (4)
Technique[技术] (2.1m)
Idea[创意] (3)
Jobs[工作] (2)
Others[杂七杂八] (18)
Code Example[编程示例] (0)
Recent questions without an upvoted answer
0
votes
259
views
1
answer
sql - Oracle Trigger copy data from one table to another
Student table : student ID, student name, student contact Evaluation: EvalID, Eval number student gives an ... bit of trigger correct? See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
205
views
1
answer
python - Function notifies commentor when the poster should get notified
If I comment on the post named "a", then I get a notification saying that I made the comment on "a" but ... = affected_users, verb='replied to') messages.success(request, "Thank...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
373
views
1
answer
Kendo UI Grid Data variable Vue.js
In the kendo UI it is possible to load the grid with data from a variable in the Vue.js? See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
249
views
1
answer
mysql - How can I order by two columns, if result is equal, consider another column?
I have tables called marks, total_marks, and aggregate. I want to sort the results first depending on the ... the one with higher total? See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
290
views
1
answer
dplyr - is there a R code for group_by and combinations
Am kindly looking for R code that can calculate the combinations with 2, of the total in each group. library(dplyr) ... <-c(6,6,6) Thankyou See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
308
views
1
answer
Using Kotlin library in java android studion
I want to use the chipped bottom navigation by https://github.com/ismaeldivita/chip-navigation-bar, But it is ... What code should I implement. See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
263
views
1
answer
php - PHP_excel: Export to xlsx gets downloaded successfully but when we open it it shows warning Excel found unreadable content
i am using php_excel to export to xlsx. In my application im making use of template. When i download, the ... please suggest me to solve this. See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
338
views
1
answer
How to Print Out the Square Root of A Negative Number with i Displayed in C
I am trying to figure out how to display the square root of a number if it happens to be negative (as it is ... %.4f", num4, sqrt(num4)); See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
384
views
1
answer
c# - It show an error "operator '==' cannot be applied to operands of type 'string' and 'int' " in "where(x => x.person_id == id)"
[HttpGet] public ActionResult EmployeeView(int id) { Employee employee = new Employee(); using (HRMSEntities employeeContext ... (employee); } } See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
393
views
1
answer
How to make JPanel scrollable in Java?
I have a class that extends JPanel, where I have overridden the paintComponent(Graphics g) method. However, I can ... ); frame.setVisible(true); See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
230
views
1
answer
Google Sheets: selecting cell values based on another cell MAX values
I'm trying to make a database of students using Google Sheets. It contains info about students, groups and ... answer for a different question. See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
240
views
1
answer
nosql - What is a Combo Repository and a Service Bus?
I am learning more about NoSQL and specifically DynamoDB. I recently asked this question: Mapping database structure ... ask another question. See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
282
views
1
answer
java - org.apache.openjpa.persistence.PersistenceException: null
The second line is causing the exception listed below. This code actually works on the test server, but is blowing up on my ... 2.2.0.jar:2.2.0] See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
429
views
1
answer
Dynamic programming - canSum memoization in C++
The objective is to return true if the sum can be made by adding up elements from a given vector. The vector ... else cout << "false"; } See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
329
views
1
answer
c# - Console (Input string was not in correct format)
Hi guys so i'm starting to learn C# and I came up with this problem when I was trying to mix things up It says "Input ... is: " + prod); } } } See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
439
views
1
answer
java - Invalid method declaration, return type required
I am getting an error at public Rectangle(double width, double height){ saying that it's an invalid method ... .getPerimeter()); } }` See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
362
views
1
answer
Cant insert data in database (Access) VB.NET
Im working on a project. Our system is Hotel Reservation. In VB it says that it added in my database but then ... koneksyon() End Sub End Class See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
288
views
1
answer
c - Memory at runtime
I have a problem which says I have to read an unknown number of text lines from a file in an array of pointers and ... ; i++; } return 0; } See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
295
views
1
answer
javascript - jQuery - on click not working for element filtered by dynamic CSS
Say I have: <a href="http://foo.com" class="SiteClass"> Then I via jQuery I do some tests and ... mind this class can be added dynamically. See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
401
views
1
answer
azure - The remote server returned an error: (403) Forbidden. At C:Program FilesWindowsPowerShellModulesCosmosDB3.1.0.293CosmosDB.psm1
I developed the PowerShell script for creating Database and Collection in the Azure Cosmos DB. #region Parameters ... to resolve the issue? See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
432
views
1
answer
php - How to store a radio button in a session for use on another page?
So I need to store the choice of selected radio button in session and then based on that value perform an action on ... one page two //do this See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
294
views
1
answer
c - gcc memory alignment using malloc
I've the following struct: #define M 3 #pragma pack(push) #pragma pack(1) struct my_btree_node { struct ... not want to waste memory. See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
276
views
1
answer
javascript - Function using reduce not working; returning false when should be true
var atLeast = function (tab,n,k){ var frequencyK = tab.reduce(function (acc, val, array){ if (val == k){ ... I can't figure out why that is. See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
284
views
1
answer
PHP how to hide some of page numbers?
I want to ask how i can hide some of the page numbers on the result page so they show like this: [First ... the page numbers when they are more? See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
247
views
1
answer
c++ - Is there a better API for the thing I want
Consider following 2 snippets: This is what I'm after: database.h: template<class T, class T2> class ... the main application? [/EDIT3] See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
290
views
1
answer
Mongodb and Express
I am trying to implement related data concept in MongoDB. I have one collection for user and one collection for posts ... ,default:Date.now} } } See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
381
views
1
answer
mysql - Failed to show XML Data with PHP Script
I have about 60000 xml files that i have to insert into a MySQL database. so i thought about making a simple ... help that would be wonderful :) See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
0
votes
314
views
1
answer
php - Searching concatenated field
SELECT `users`.`firstname`, `users`.`lastname`, `users`.`id`, CONCAT(firstname," " ,lastname) AS `users. ... sql guru to help me out. See Question&Answers more detail:os...
asked
Jan 31, 2022
in
Technique[技术]
by
深蓝
(
71.8m
points)
Page:
« prev
1
...
123
124
125
126
127
128
129
130
131
132
133
...
715
next »
Ask a question:
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question
Just Browsing Browsing
[1] 为什么在子盒子和父盒子高度一样的情况下,子盒子的背景颜色会和父盒子边框之间有很小的一段距离?
[2] 为啥每次只有刷新页面才能执行这个动画,从其他页面跳转过去动画不生效,没有使用keep-alive缓存?
[3] swift - Create array of other model with Realm - SwiftUI
[4] spring boot - If we have setValidateAfterInactivity() defined, do we still need to use idle connection monitor thread?
[5] regex - PHP preg_match parser - How get uppercase letters
[6] element-ui表格hover效果错误怎么办?
[7] easyswoole无法启动
[8] 谷歌浏览器iframe跨域无法获取cookie
[9] material design - Android: theme.xml file in values overriding gradient_file.xml in drawable
[10] JS怎么实现让输入框内容转换成繁体字?
2.1m
questions
2.1m
answers
60
comments
57.0k
users
Most popular tags
javascript
python
c#
java
How
android
c++
php
ios
html
sql
r
c
node.js
.net
iphone
asp.net
css
reactjs
jquery
ruby
What
Android
objective
mysql
linux
Is
git
Python
windows
Why
regex
angular
swift
amazon
excel
algorithm
macos
Java
visual
how
bash
Can
multithreading
PHP
Using
scala
angularjs
typescript
apache
spring
performance
postgresql
database
flutter
json
rust
arrays
C#
dart
vba
django
wpf
xml
vue.js
In
go
Get
google
jQuery
xcode
jsf
http
Google
mongodb
string
shell
oop
powershell
SQL
C++
security
assembly
docker
Javascript
Android:
Does
haskell
Convert
azure
debugging
delphi
vb.net
Spring
datetime
pandas
oracle
math
Django
联盟问答网站-Union QA website
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
DevDocs API Documentations
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
在这了问答社区
DevDocs API Documentations
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
DevDocs API Documentations
广告位招租
...