OStack Q&A-Knowledge Sharing Community

0 votes

455 views

1 answer

multithreading - What are the differences between various threading synchronization options in C#?

Can someone explain the difference between: lock (someobject) {} Using Mutex Using Semaphore Using Monitor Using Other . ... two are the same? See Question&Answers more detail:os...

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

0 votes

181 views

1 answer

android - Using build types in Gradle to run same app that uses ContentProvider on one device

I have set up Gradle to add package name suffix to my debug app so I could have release version that I'm ... on one device is always welcome. See Question&Answers more detail:os...

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

0 votes

584 views

1 answer

class - Difference between 'cls' and 'self' in Python classes?

Why is cls sometimes used instead of self as an argument in Python classes? For example: class Person: def __init__( ... fullname.split(' ', 1) See Question&Answers more detail:os...

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

0 votes

782 views

1 answer

excel - Convert xlsx to csv in Linux with command line

I'm looking for a way to convert xlsx files to csv files on Linux. I do not want to use PHP/Perl or ... for the newer Excel files. Any ideas? See Question&Answers more detail:os...

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

0 votes

458 views

1 answer

ajax - How to make a SPA SEO crawlable?

I've been working on how to make a SPA crawlable by google based on google's instructions. Even though ... help people using other platforms. See Question&Answers more detail:os...

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

0 votes

221 views

1 answer

How to display request headers with command line curl

Command line curl can display response header by using -D option, but I want to see what request header it is sending. How can I do that? See Question&Answers more detail:os...

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

0 votes

305 views

1 answer

c# - If strings are immutable in .NET, then why does Substring take O(n) time?

Given that strings are immutable in .NET, I'm wondering why they have been designed such that string.Substring() ... were the tradeoffs, if any? See Question&Answers more detail:os...

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

0 votes

254 views

1 answer

python - What is the source code of the "this" module doing?

If you open a Python interpreter, and type "import this", as you know, it prints: The Zen of Python, by Tim Peters ... (c, c) for c in s]) 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

How to fix a locale setting warning from Perl

When I run perl, I get the warning: perl: warning: Setting locale failed. perl: warning: Please check that your locale ... "). How do I fix it? See Question&Answers more detail:os...

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

0 votes

192 views

1 answer

Recursively counting files in a Linux directory

How can I recursively count files in a Linux directory? I found this: find DIR_NAME -type f | wc -l But ... : paths must precede expression: | See Question&Answers more detail:os...

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

0 votes

324 views

1 answer

java - How to reference a method in javadoc?

How can I use the @link tag to link to a method? I want to change: /** * Returns the Baz object owned ... how to format the @link tag correctly. See Question&Answers more detail:os...

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

0 votes

108 views

1 answer

How to push a docker image to a private repository

I have a docker image tagged as me/my-image, and I have a private repo on the dockerhub named me-private. When ... my image to my private repo? See Question&Answers more detail:os...

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

0 votes

191 views

1 answer

Is git-svn dcommit after merging in git dangerous?

My motivation for trying out git-svn is the effortless merging and branching. Then I noticed that man git-svn(1) ... do these kinds of things? See Question&Answers more detail:os...

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

0 votes

146 views

1 answer

Finding JavaScript memory leaks with Chrome

I've created a very simple test case that creates a Backbone view, attaches a handler to an event, and ... @Jonathan Naguin's answer below. See Question&Answers more detail:os...

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

0 votes

544 views

1 answer

javascript - Can I run HTML files directly from GitHub, instead of just viewing their source?

If I have a .html file in a GitHub repository, e.g. for running a a set of JavaScript tests, is there any ... type from text/plain to text/html. See Question&Answers more detail:os...

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

0 votes

269 views

1 answer

php - Add a new column to existing table in a migration

I can't figure out how to add a new column to my existing database table using the Laravel framework. I tried to ... How do I add new columns? See Question&Answers more detail:os...

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

0 votes

408 views

1 answer

c++ - WaitForInputIdle doesn't work for starting mspaint programmatically

I'm trying to open "mspaint" and find handle of it right after it has been initialized. But FindWindow returns ... mspaint program"); return; } See Question&Answers more detail:os...

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

0 votes

332 views

1 answer

java - Parallel execution of directed acyclic graph of tasks

I have a list of tasks [Task-A,Task-B,Task-C,Task-D, ...]. One task can be optionally dependent on other tasks ... run(){ // business logic } } See Question&Answers more detail:os...

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

0 votes

607 views

1 answer

sapui5 - Add a New Item to a Table / List

I have a fragment / view written in XML which contains a simple table with some columns and one ColumnListItem: < ... do this than my approach. See Question&Answers more detail:os...

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

0 votes

635 views

1 answer

floating point - Compare two float variables in C++

I have read multiple articles regarding floating point variables comparison, but failed to understand and get the ... hold different values. See Question&Answers more detail:os...

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

0 votes

182 views

1 answer

Selenium not able to click on Get Data button on using Python

I am scraping data from this website . The element is below and geckodriver <img class="getdata-button" style="float ... around to get it done? See Question&Answers more detail:os...

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

0 votes

228 views

1 answer

c++ - Vector assignment crashing

vector< vector<int> > resizeVector(vector< vector<int> > m) { vector< vector<int> > newMatrix; int i,j; for (i ... here, and I am not sure why. See Question&Answers more detail:os...

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

0 votes

486 views

1 answer

actionscript 3 - How to notify the HTML container that the SWF has finished, using swfobject

I am embedding a flash object (swf file) into an HTML page. The object is written in as3 and built using ... what am I doing wrong? Thanks! See Question&Answers more detail:os...

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

0 votes

333 views

1 answer

r - the condition has length > 1 and only the first element will be used in if else statement

pred=data.frame(seq(1,100,by=2)) obs=data.frame(seq(1,100,by=3)) pr=data.frame(seq(1,200,by=4 ... first element will be used" any alternatives?? See Question&Answers more detail:os...

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

0 votes

424 views

1 answer

less - LessCss dynamic variables based on ancestor class

I have a page template which has a branding class on the body element: <body class="brand-africa"> <h1 ... to determine the returned value. See Question&Answers more detail:os...

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

0 votes

198 views

1 answer

ios - Valid file path for archiverootobject and unarchiverootobject

I am making an iPhone app and in a previous question I was told that I needed a valid file path for ... still works would anyone know why? See Question&Answers more detail:os...

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

0 votes

303 views

1 answer

python - Django server killed frequently

I'm developing a Django project and testing it on a dedicated server. The project is running on: django 1.9.6 ... ...">&2 sleep 2 done See Question&Answers more detail:os...

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

0 votes

228 views

1 answer

My MySQL trigger doesn't work, simple syntax, not complicated

I don't know why my trigger isn't working, the query works when I use it manually, but when I want ... invoked this stored function/trigger". 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