OStack Q&A-Knowledge Sharing Community

0 votes

70 views

1 answer

How do I do a deep copy of a 2d array in Java?

I just got bit by using .clone() on my 2d boolean array, thinking that this was a deep copy. How can I ... through it and do a series of System.arraycopy's? Question&Answers:os...

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

0 votes

393 views

1 answer

c# - Does Json.NET cache types' serialization information?

In .NET world, when it comes to object serialization, it usually goes into inspecting the object's fields and ... access info and cache to reuse it later? Question&Answers:os...

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

0 votes

101 views

1 answer

android - ViewPager and fragments — what's the right way to store fragment's state?

Fragments seem to be very nice for separation of UI logic into some modules. But along with ViewPager its ... mMessagesFragment = new MessagesFragment(); ... } Question&Answers:os...

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

0 votes

49 views

1 answer

javascript - Get current URL with jQuery?

I am using jQuery. How do I get the path of the current URL and assign it to a variable? Example URL: http://localhost/menuname.de?foo=bar&number=0 Question&Answers:os...

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

0 votes

212 views

1 answer

Why are Python's 'private' methods not actually private?

Python gives us the ability to create 'private' methods and variables within a class by prepending double underscores to ... , so why even try? What gives? Question&Answers:os...

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

0 votes

300 views

1 answer

How to import CSV file data into a PostgreSQL table?

How can I write a stored procedure that imports data from a CSV file and populates the table? Question&Answers:os...

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

0 votes

380 views

1 answer

C# DateTime to "YYYYMMDDHHMMSS" format

I want to convert a C# DateTime to "YYYYMMDDHHMMSS" format. But I don't find a built in method to get this format? Any comments? Question&Answers:os...

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

0 votes

81 views

1 answer

How to make asynchronous HTTP requests in PHP

Is there a way in PHP to make asynchronous HTTP calls? I don't care about the response, I just want ... my application, or triggering long processes. Any ideas? Question&Answers:os...

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

0 votes

211 views

1 answer

Saving and Reading Bitmaps/Images from Internal memory in Android

What I want to do, is to save an image to the internal memory of the phone (Not The SD Card). How can ... I would appreciate if I can have a detailed procedure. Question&Answers:os...

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

0 votes

161 views

1 answer

java - Spring Boot Configure and Use Two DataSources

How can I configure and use two data sources? For example here is what I have for the first data source: ... autowire it to be used by a different repository? Question&Answers:os...

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

0 votes

187 views

1 answer

Speed up millions of regex replacements in Python 3

I have two lists: a list of about 750K "sentences" (long strings) a list of about 20K "words" that I would like ... of an improvement. I'm using Python 3.5.2 Question&Answers:os...

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

0 votes

416 views

1 answer

parsing - An efficient way to transpose a file in Bash

I have a huge tab-separated file formatted like this X column1 column2 column3 row1 0 1 2 row2 3 4 5 ... -slow. Any thoughts/suggestions/brilliant ideas? :-) Question&Answers:os...

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

0 votes

168 views

1 answer

c++ - Generating random integer from a range

I need a function which would generate a random integer in given range (including border values). I don ... even whole pseudo-random number generator function) Question&Answers:os...

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

0 votes

486 views

1 answer

debugging - How to set up symbols in WinDbg?

I am using Debugging Tools for Windows and I get the following error message when starting WinDbg / cdb or ntsd: ... to all the wrong symbols posts in windbg. Question&Answers:os...

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

0 votes

442 views

1 answer

c# - Type.GetType("namespace.a.b.ClassName") returns null

This code: Type.GetType("namespace.a.b.ClassName") returns null. and I have in the usings: using namespace.a.b; ... , and i need to get it by string name. Question&Answers:os...

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

0 votes

177 views

1 answer

What is the maximum possible length of a .NET string?

What is the longest string that can be created in .NET? The docs for the String class are silent on this ... to create any code that uses gigantic strings!] Question&Answers:os...

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

0 votes

208 views

1 answer

c - Comparison operation on unsigned and signed integers

See this code snippet int main() { unsigned int a = 1000; int b = -1; if (a>b) printf("A is BIG! %d ... why do i get a positive number (1001) as the difference? Question&Answers:os...

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

0 votes

209 views

1 answer

Comparison of Android Web Service and Networking libraries: OKHTTP, Retrofit and Volley

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Question&Answers:os...

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

0 votes

287 views

1 answer

tuples - What is the equivalent of the C++ Pair<L,R> in Java?

Is there a good reason why there is no Pair<L,R> in Java? What would be the equivalent of this C++ ... .SimpleEntry<K,V>), but this looks quite convoluted. Question&Answers:os...

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

0 votes

389 views

1 answer

http - Can PHP cURL retrieve response headers AND body in a single request?

Is there any way to get both headers and body for a cURL request using PHP? I found that this option: ... avoiding issuing a HEAD request prior of GET/POST. Question&Answers:os...

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

0 votes

275 views

1 answer

angular - *ngIf and *ngFor on same element causing error

I'm having a problem with trying to use Angular's *ngFor and *ngIf on the same element. When trying to loop ... Am I doing something wrong or is this a bug? Question&Answers:os...

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

0 votes

1.2k views

1 answer

Mysql error 1452 - Cannot add or update a child row: a foreign key constraint fails

I'm having a bit of a strange problem. I'm trying to add a foreign key to one table that references ... sourcecodes (id) ON DELETE CASCADE ON UPDATE CASCADE Question&Answers:os...

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

0 votes

227 views

1 answer

Linear Regression and group by in R

I want to do a linear regression in R using the lm() function. My data is an annual time series with one field for ... by'. What's the R way of doing this? Question&Answers:os...

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

0 votes

256 views

1 answer

reflection - How do I programmatically compile and instantiate a Java class?

I have the class name stored in a property file. I know that the classes store will implement IDynamicLoad. How do ... I load a Java Class that is not compiled? Question&Answers:os...

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

0 votes

136 views

1 answer

python - How to test if a string contains one of the substrings in a list, in pandas?

Is there any function that would be the equivalent of a combination of df.isin() and df[col].str.contains()? For ... any() Is there a better way to do this? Question&Answers:os...

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

0 votes

63 views

1 answer

c# - Finding the variable name passed to a function

Let me use the following example to explain my question: public string ExampleFunction(string Variable) { return something; } ... ) Is there any way to do this? Question&Answers:os...

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

0 votes

232 views

1 answer

c# - Division returns zero

This simple calculation is returning zero, I can't figure it out: decimal share = (18 / 58) * 100; Question&Answers:os...

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

0 votes

159 views

1 answer

python - Removing from a list while iterating over it

The following code: a = list(range(10)) remove = False for b in a: if remove: a.remove(b) remove = ... to work around the behaviour, but to understand 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