OStack Q&A-Knowledge Sharing Community

0 votes

368 views

1 answer

python - What is the difference between an opencv BGR image and its reverse version RGB image[:,:,::-1]?

I'm trying to show an opencv image with a QLabel. I got two different versions of the image, first one ... ) self.ui.label.setPixmap(QPixmap.fromImage(qImg)) Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

102 views

1 answer

c++ - Shadowing variables

My question is about variables defined into classes. I show you my problem. I have defined this class: class Measure { ... make this work in C++. Thanks a lot! Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

202 views

1 answer

python - Created multiple instances of the same image using a loop, can I move each instance of the image independently?

I have an image in pygame with multiple instances of the image called in a for loop. is there a way I could ... screen.blit(self.image, (x_pos*100, y_pos)) Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.3k views

1 answer

arduino - Store value in variable after HTTPREAD

I am working with a GSM SIM900 and an Arduino Uno. I am using AT commands for the SIM900. I am successfully ... HTTPREAD +HTTPREAD: 17 [{"Status":true}] OK Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

208 views

1 answer

python - Getting values from object oriented tkinter

This question already has answers here: Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.5k views

1 answer

vim - Indent multiple lines quickly in vi

It should be trivial, and it might even be in the help, but I can't figure out how to navigate it. How do I indent multiple lines quickly in vi? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

262 views

1 answer

Java's Date(...) constructor is deprecated; what does that mean?

I'm trying to create a Date like this: date = new Date(year-1900, mon-1, day, hrs, min, sec); and ... a constructor to be deprecated, and what can I do? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.4k views

1 answer

vb.net - VB6 keyword Set what does it mean?

I been browsing an old VB6 code and I saw something like this Set AST = CreateObject("ADODB.Stream") I have ... want to know what does the Set do in VB6 Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

357 views

1 answer

html - Bootstrap 4 Cards of same height in columns

I'm currently working on Cards from Bootstrap. Depending on the text title I will get the different height for the cards and ... </div> </div> </body> </html> Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

330 views

1 answer

performance - Given n points on a 2D plane, find the maximum number of points that lie on the same straight line

Below is the solution I am trying to implement /** * Definition for a point. * class Point { * int x; * int y ... at better run time. I can't think of any. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

226 views

1 answer

C#: Prepending to beginning of a file

What is the best way to add text to the beginning of a file using C#? I couldn't find a straightforward way to do ... this problem, and if so, what did you do? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

80 views

1 answer

MySql Error 150 - Foreign keys

When I execute the follow two queries (I have stripped them down to absolutely necessary): mysql> CREATE TABLE foo( ... while staring at this for half an hour. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

554 views

1 answer

python - Flask-Login raises TypeError: 'bool' object is not callable when trying to override is_active property

I want to modify is_active in Flask-Login so that users are not always active. The default always returns True, ... ): TypeError: 'bool' object is not callable Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.3k views

1 answer

php - SimpleXML - Remove xpath node

I'm a little confused as to how I can delete a parent node of something which I can find via an ... would delete everything. Any ideas much appreciated :-) Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

453 views

1 answer

powershell - Objects with no '.Count' Property - use of @() (array subexpression operator) vs. [Array] cast

I am trying to perform some simple if statements, but all of the newer cmdlets that are based upon [Microsoft. ... going about this in entirely the wrong way? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

173 views

1 answer

datetime - Java: Get current Date and Time from Server not System clock

In my Java program, I need to create an instance of the current moment in time. I use Date date = new ... dependant on the host machine's system clock. Thanks! Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

133 views

1 answer

c# - Remote Validation for LIST of MODELs

I used the following tutorial: http://msdn.microsoft.com/en-us/library/gg508808%28VS.98%29.aspx And everything seemed fine, ... => Model[i].Username) </td> } Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

198 views

1 answer

python - Web scraping program cannot find element which I can see in the browser

I am trying to get the titles of the streams on https://www.twitch.tv/directory/game/Dota%202, using Requests and BeautifulSoup. ... </div> </a> </div> </div> Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.0k views

1 answer

powershell: how to escape all regex characters from a string

I am wondering if there is a better way to escape regex characters in powershell, I know C# has Regex.Escape, but I'm not ... -replace "(","(" -replace ")",")" Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

104 views

1 answer

ios - Two (or more) optionals in Swift

While watching an Apple's video about LLDB debugger I found something I can't find an explanation for; he was talking about ... to wrap a value 4, 5 or 6 times. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

266 views

1 answer

how to detect whether VBA excel found something?

i am using this to in a macro to find stuff in my sheet: Selection.Find(What:=email, After:=ActiveCell, ... can i tell whether or not it found something? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

361 views

1 answer

java - Mac OSX - IllegalStateException: The driver is not executable:

Im new to Mac OSX. Downloaded my Robotframework(Selenium & Java) project from git and tried to execute the code ... driver.manage().window().maximize(); } Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

275 views

1 answer

sql - How to find the employee with the second highest salary?

Is there any predefined function or method available to get the second highest salary from an employee table? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

654 views

1 answer

forms - How to render an openGL frame in C++ builder?

I want to initialize an openGL frame inside a form in C++ builder. I tried copying the contents of this ... to do this properly, any experience with this? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

271 views

1 answer

swift - Why can't I instantiate an empty array of a nested class?

I seem to be having problems instantiating an empty array of a nested class type using the [foo]() style syntax ... : var foobar: [Wrapper.InsideClass] = [] Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

217 views

1 answer

javascript - Why is 'event' variable available even when not passed as a parameter?

I wonder why does the following code work in some browsers? I.e. even when there's no parameter to a click() ... () { $(event.target).<dosomething> }); Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

747 views

1 answer

composer php - Class FooBarBaz located in ./foo/bar/utility/baz.php does not comply with psr-4 autoloading standard. Skipping

When running composer's update, install, require, dump-autoload, etc.; I suddenly start getting a yellow deprecation ... it and get ready for Composer 2.0? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

118 views

1 answer

java - Struts 2 : There is no Action mapped for namespace [/]

I am new to Struts 2 and I have been following a video tutorial on Struts 2(Koushik). I have created the Struts ... 's behind this. I highly appreciate it. :) Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

Categories

Recent questions

Just Browsing Browsing

Most popular tags