OStack Q&A-Knowledge Sharing Community

0 votes

246 views

1 answer

c++ - Unsequenced value computations (a.k.a sequence points)

Sorry for opening this topic again, but thinking about this topic itself has started giving me an Undefined Behavior ... to built-in operators." See Question&Answers more detail:os...

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

0 votes

298 views

1 answer

c++ - Using assignment as a condition expression?

Consider: if (a=5) { /* do something */ } How does the assignment work as a condition? Is it based on non-zero value of l-value? See Question&Answers more detail:os...

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

0 votes

207 views

1 answer

php - using nulls in a mysqli prepared statement

In a mysqli prepared statement, a NULL gets turned into '' (in the case of a string) or 0 (in the case of ... . Is there any way of doing this? See Question&Answers more detail:os...

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

0 votes

1.8k views

1 answer

c# - End of Central Directory record could not be found

I am downloading a zip file using c# program and I get the error at System.IO.Compression.ZipArchive. ... anybody explain this Thanks MR See Question&Answers more detail:os...

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

0 votes

274 views

1 answer

Problem with start date and scheduled date in Apache airflow

I am working with Apache airflow and I have a problem with the scheduled day and the starting day. I want a dag to ... 12-08 at 08:00:00. Why? See Question&Answers more detail:os...

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

0 votes

337 views

1 answer

python - How to check MouseButtonPress event in PyQt6?

In PyQt5, we can validate an event occurrence using QEvent class, for example QEvent.MouseButtonPress. In PyQt6 the ... 'timestamp', 'type'] See Question&Answers more detail:os...

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

0 votes

690 views

1 answer

arrays - Difference between map and collect in Ruby?

I have Googled this and got patchy / contradictory opinions - is there actually any difference between doing a ... in method or performance? See Question&Answers more detail:os...

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

0 votes

248 views

1 answer

javascript - ReactJS - Get Height of an element

How can I get the Height of an element after React renders that element? HTML <div id="container"> <!-- This ... be 18px in this case. jsfiddle See Question&Answers more detail:os...

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

0 votes

430 views

1 answer

java - HttpGet with HTTPS : SSLPeerUnverifiedException

Using HttpClient, I receive the following error when attempting to communicate over HTTPS: Exception in thread "main" ... or remove this error? See Question&Answers more detail:os...

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

0 votes

612 views

1 answer

python - Count consecutive characters

How would I count consecutive characters in Python to see the number of times each unique digit repeats before the ... a solution that way. See Question&Answers more detail:os...

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

0 votes

626 views

1 answer

branching and merging - git cherry-pick not working

I'm trying to cherry-pick a commit from master and get it into the current production branch. However, when ... resolve this would be helpful~! See Question&Answers more detail:os...

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

0 votes

422 views

1 answer

c# - How to display items in Canvas through Binding

I have list of items that I want to display in Canvas using data binding. ItemsToShowInCanvas = new ... </ItemsControl> </Canvas> See Question&Answers more detail:os...

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

0 votes

357 views

1 answer

c# - Read from word document line by line

I'm trying to read a word document using C#. I am able to get all text but I want to be able to ... .DataSource = data; GridView1.DataBind(); See Question&Answers more detail:os...

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

0 votes

151 views

1 answer

Showing random divs using Jquery

I have a list if divs which contain images. I need to randomly show 4 of these each time the page loads ... . Any pointers would be appreciated. See Question&Answers more detail:os...

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

0 votes

443 views

1 answer

android - How to detect app removed from the recent list?

I'm working on a music app, and I want stop the service when user removes the application from the recent ... getting destroyed). Please help. See Question&Answers more detail:os...

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

0 votes

914 views

1 answer

datetime - python converting string in localtime to UTC epoch timestamp

I have strings in YMD hms format that had the timezone stripped. But I know they are in Eastern time with daylight ... :07 UTC. What is wrong? See Question&Answers more detail:os...

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

0 votes

630 views

1 answer

x86 - Is LFENCE serializing on AMD processors?

In recent Intel ISA documents the lfence instruction has been defined as serializing the instruction stream ( ... the instruction stream? See Question&Answers more detail:os...

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

0 votes

783 views

1 answer

assembly - How to tell the length of an x86 instruction?

I was looking at the different instructions in assembly and I am confused on how the lengths of different operands ... its opcode will require? See Question&Answers more detail:os...

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

0 votes

545 views

1 answer

javascript - Pass props from child to parent react navigation

I am using react-navigation. I am passing propsfrom a react-native component to the modal from react-navigation ... only called from there... See Question&Answers more detail:os...

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

0 votes

770 views

1 answer

assembly - x86 XOR opcode differences

looking at http://ref.x86asm.net/coder32.html I found two opcodes that match for the statement xor eax,eax ... the XORing two 32bit registers ? See Question&Answers more detail:os...

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

0 votes

231 views

1 answer

Python and MySQLdb: substitution of table resulting in syntax error

I need to dynamically change tables and variables from time to time, so I wrote a python method like this: ... substituted query as a string ? See Question&Answers more detail:os...

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

0 votes

349 views

1 answer

python - PIL and pygame.image

I had opened an image using PIL, as image = Image.open("SomeImage.png") Draw some text on it, as draw = ... . Can that save method be surpassed? See Question&Answers more detail:os...

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

0 votes

491 views

1 answer

c# - Why does not match word using .net regex

To review regular expresions I read this tutorial. Anyways that tutorial mentions that matches a word boundary (between w ... I don't. why? See Question&Answers more detail:os...

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

0 votes

185 views

1 answer

Option Strict on by default in VB.NET

Whenever I created a new VB.NET program I must go into the project's properties and set 'Option strict' on. ... time I create a new project? See Question&Answers more detail:os...

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

0 votes

225 views

1 answer

(pandas) Create new column based on first element in groupby object

Say I have the following dataframe: >>> df = pd.DataFrame({'Person': ['bob', 'jim', 'joe', 'bob ... have to iterate through the groupby object? See Question&Answers more detail:os...

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

0 votes

461 views

1 answer

draw - Pygame how to fix 'trailing pixels'?

In the image the red trail is a trail that pygame is creating when I have a bounding rectangle added around sprites. ... . How can I fix this? See Question&Answers more detail:os...

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

0 votes

1.2k views

1 answer

git - Github file size limit changed 6/18/13. Can't push now

How does this change as of June 18, 2013 affect my existing repository with a file that exceeds that limit? ... -cached cron_log.log Same error. See Question&Answers more detail:os...

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

0 votes

439 views

1 answer

windows phone 7 - Display GIF in a WP7 application with Silverlight

I would like to display gif in my WP7 application. Is there some way to achieve this ? I've tryed this one ... . Thanks in advance for any help See Question&Answers more detail:os...

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

Categories

Recent questions

Just Browsing Browsing

Most popular tags