OStack Q&A-Knowledge Sharing Community

0 votes

504 views

1 answer

oracle - Select First Row of Every Group in sql

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

275 views

1 answer

r - Split character column into several binary (0/1) columns

I have a character vector like this: a <- c("a,b,c", "a,b", "a,b,c,d") What I would ... .table and reshape but am really struggling. Any and help appreciated. Question&Answers:os...

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

0 votes

253 views

1 answer

math - Strange floating-point behaviour in a Java program

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

89 views

1 answer

ios - Returning method object from inside block

I am wondering how to do the following correctly: I have a method that is to return an NSData object. It ... make a thread blocking wait/while loop? Thanks. Question&Answers:os...

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

0 votes

53 views

1 answer

java - To display an image

I want to display an image from the web to a panel in another JFrame at the click of a button. Whenever ... .JPanel jPanel1; // End of variables declaration } Question&Answers:os...

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

0 votes

139 views

1 answer

mysql - Return default result for IN value regardless

I have a query that gets all user that have been online between a certain date range. This is done via ... function. I'm not using deprecated mysql functions Question&Answers:os...

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

0 votes

320 views

1 answer

r - Rotating and spacing axis labels in ggplot2

I have a plot where the x-axis is a factor whose labels are long. While probably not an ideal visualization, for ... + opts(axis.text.x=theme_text(angle=-90)) Question&Answers:os...

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

0 votes

234 views

1 answer

What's the difference between map() and flatMap() methods in Java 8?

In Java 8, what's the difference between Stream.map() and Stream.flatMap() methods? Question&Answers:os...

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

0 votes

178 views

1 answer

c# - How using try catch for exception handling is best practice

while maintaining my colleague's code from even someone who claims to be a senior developer, I often see the ... users should know what happens with the system. Question&Answers:os...

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

0 votes

238 views

1 answer

optimization - Java NIO FileChannel versus FileOutputstream performance / usefulness

I am trying to figure out if there is any difference in performance (or advantages) when we use nio FileChannel versus normal ... "+(time2-time1)+" ms"); } } Question&Answers:os...

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

0 votes

666 views

1 answer

linux - C/C++ with GCC: Statically add resource files to executable/library

Does anybody have an idea how to statically compile any resource file right into the executable or the ... for shared libraries and normal ELF-executables. Question&Answers:os...

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

0 votes

222 views

1 answer

What's the best way to determine the location of the current PowerShell script?

Whenever I need to reference a common module or script, I like to use paths relative to the current ... get the current PowerShell script file's location? Question&Answers:os...

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

0 votes

665 views

1 answer

alignment - How to vertically center <div> inside the parent element with CSS?

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

80 views

1 answer

Differences in string compare methods in C#

Comparing string in C# is pretty simple. In fact there are several ways to do it. I have listed some in the block ... but feel free to comment on that as well) 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 create a custom string representation for a class object?

Consider this class: class foo(object): pass The default string representation looks something like this: >>> str( ... can I make this display a custom string? Question&Answers:os...

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

0 votes

102 views

1 answer

python - How to get the input from the Tkinter Text Widget?

How to get Tkinter input from the Text widget? EDIT I asked this question to help others with the same problem ... - the answer is the thing that matters. Question&Answers:os...

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

0 votes

304 views

1 answer

Split string on spaces in Java, except if between quotes (i.e. treat "hello world" as one token)

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

122 views

1 answer

python - Detecting consecutive integers in a list

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

292 views

1 answer

Changing iframe src with Javascript

I am trying to change an <iframe src=... > when someone clicks a radio button. For some reason my code is not working ... ')" />Month </form> </body> </html> Question&Answers:os...

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

0 votes

100 views

1 answer

c# - How to get Windows Display settings?

There is setting for Display in Windows 7 (Control Panel -> Display). It allows to change the size of the ... based on the setting value. Is that possible? Question&Answers:os...

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

0 votes

402 views

1 answer

html - CSS :selected pseudo class similar to :checked, but for <option> elements

Is there a way to style the currently selected <option> element in a <select> element? I could then give ... that's currently viewable in the closed dropdown. Question&Answers:os...

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

0 votes

171 views

1 answer

How to add click event to a iframe with JQuery

I have an iframe on a page, coming from a 3rd party (an ad). I'd like to fire a click event when that ... seem to get any variation of this to work. Thoughts? Question&Answers:os...

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

0 votes

75 views

1 answer

javascript - Open local folder from link

How can I open a local folder view by clicking on any link? I tried many options like <a href="file:///D:/Tools/"> ... .open(file:///D:/Tools/)">Open folder</a> Question&Answers:os...

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

0 votes

306 views

1 answer

android - How to read file from res/raw by name

I want to open a file from the folder res/raw/. I am absolutely sure that the file exists. To open the file I ... to access a file in the folder /res/raw/ ? Question&Answers:os...

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

0 votes

296 views

1 answer

Android deprecated apache module (HttpClient, HttpResponse, etc.)

Android has deprecated the Apache module since API level 22, so my question is,?how do I use, for example? ... OK, because it's called HttpGetHC4 in Apache. Question&Answers:os...

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

0 votes

68 views

1 answer

c# - Is there a good LINQ way to do a cartesian product?

I have a class structure like so: Person Dogs (dog 1, dog 2, etc) Puppies (puppy A, puppy B, etc) There is ... ish way to do this kinda thing??? Thanks so much Question&Answers:os...

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

0 votes

231 views

1 answer

java - Which Cipher Suites to enable for SSL Socket?

I'm using Java's SSLSocket to secure communications between a client and a server program. The ... not have unlimited cryptographic policy files installed. Question&Answers:os...

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

0 votes

309 views

1 answer

c# - how to dynamically generate HTML code using .NET's WebBrowser or mshtml.HTMLDocument?

Most of the answers I have read concerning this subject point to either the System.Windows.Forms.WebBrowser class or ... it. That's horrible solution, though. 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