OStack Q&A-Knowledge Sharing Community

0 votes

175 views

1 answer

c# - Why is ConcurrentBag<T> so slow in .Net (4.0)? Am I doing it wrong?

Before I started a project, I wrote a simple test to compare the performance of ConcurrentBag from (System.Collections.Concurrent) ... -so-slow-in-net-4-0-am-i-doing-it-wrong...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

471 views

1 answer

pyspark - Python Spark Cumulative Sum by Group Using DataFrame

How do I compute the cumulative sum per group specifically using the DataFrame abstraction; and in PySpark? With ... /45946349/python-spark-cumulative-sum-by-group-using-dataframe...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

69 views

1 answer

javascript - How do I connect bower components with sails.js?

I'd like to be able to install Javascript dependencies through bower and use them in a sails.js app, but I ... /questions/18139290/how-do-i-connect-bower-components-with-sails-js...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

191 views

1 answer

superclass - C# : how do you obtain a class' base class?

In C#, how does one obtain a reference to the base class of a given class? For example, suppose you have a ... /questions/1105251/c-sharp-how-do-you-obtain-a-class-base-class...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

214 views

1 answer

git - GitHub: Why should I fork?

I understand that forking is cloning the repository on the server side. But I don't understand why I would ... ://stackoverflow.com/questions/31209669/github-why-should-i-fork...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

116 views

1 answer

How to build .ipa application for react-native-ios?

(Closed.) This question needs debugging details. It is not currently accepting answers. question from:https:// ... 42110496/how-to-build-ipa-application-for-react-native-ios...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

161 views

1 answer

html - Two floated columns - one fixed, one loose width

I've looked around SO, but I cannot find one that matches my occurrence, I basically have two columns one ... com/questions/4676442/two-floated-columns-one-fixed-one-loose-width...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

258 views

1 answer

typescript - Cannot find control with name: formControlName in angular reactive form

I found this problem in many questions in stackoverflow but no luck. Please help me for figuring out what I ... @ zone.js:649 drainMicroTaskQueue @ zone.js:582 Zone...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

99 views

1 answer

iphone - How to find UILabel's number of Lines

I displayed the text in UILabel by using wrap method. Now I want to need to find the how many number ... /stackoverflow.com/questions/4172615/how-to-find-uilabels-number-of-lines...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

322 views

1 answer

database - MySQL : Multiple row as comma separated single row

I have two tables : DISH and DISH_HAS_DISHES. Dish table has all the dishes and "Dish_has_dishes" table has ... /questions/3492539/mysql-multiple-row-as-comma-separated-single-row...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

236 views

1 answer

php - How to use __dir__?

I want to use __dir__. However, I can't find any good tutorial on how to set it up. I have my htdocs ... question from:https://stackoverflow.com/questions/32537477/how-to-use-dir...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

347 views

1 answer

php - Get driving distance between two points using Google Maps API

I'm trying to get driving distance between two points using Google Maps API. Now, I have code which get ... 29003118/get-driving-distance-between-two-points-using-google-maps-api...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

240 views

1 answer

javascript - Google Chrome Customize Developer Tools Theme / Color Schema

How to change color schema on Developer Tools, JavaScript Console in Google Chrome ? Like this: question ... /20777454/google-chrome-customize-developer-tools-theme-color-schema...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

131 views

1 answer

html - What are DOM levels?

I've heard DOM level 2 and DOM level 3 mentioned in previous posts. Are these abstract constructs like the ... from:https://stackoverflow.com/questions/6629093/what-are-dom-levels...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

233 views

1 answer

How can I stop python.exe from closing immediately after I get an output?

(This question already has answers here): question from:https://stackoverflow.com/questions/3591807/how-can-i-stop-python-exe-from-closing-immediately-after-i-get-an-output...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

203 views

1 answer

Is there a way to simulate multiple iphones using xcode/iphone sim?

I'm planning out a game that requires multiple users and I was wondering if there's a way to fire up multiple ... is-there-a-way-to-simulate-multiple-iphones-using-xcode-iphone-sim...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

92 views

1 answer

Why does {} + [] return 0 in Javascript?

(This question already has answers here): question from:https://stackoverflow.com/questions/11939044/why-does-return-0-in-javascript...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

168 views

1 answer

php - UNIX timestamp always in GMT?

UNIX timestamp always in GMT? I tried to run php function time() and when I tried to convert the unix ... :https://stackoverflow.com/questions/2853977/unix-timestamp-always-in-gmt...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

118 views

1 answer

c++ - Is there a way to disable all warnings with a pragma?

I've started a new project and have decided to make sure it builds cleanly with the /Wall option enabled. The only ... 525677/is-there-a-way-to-disable-all-warnings-with-a-pragma...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

240 views

1 answer

c++ - Why does Release/Debug have a different result for std::min?

Here is the test program: void testFunc() { double maxValue = DBL_MAX; double slope = std::numeric_limits<double> ... /why-does-release-debug-have-a-different-result-for-stdmin...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

165 views

1 answer

python - Python3: writing csv files

I'm trying to use Python 3.2 on a Windows computer to write a simple CSV file, however I'm having ... from:https://stackoverflow.com/questions/7200606/python3-writing-csv-files...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

238 views

1 answer

floating point - Java: Why do you need to specify an 'f' in a float literal?

(This question already has answers here): question from:https://stackoverflow.com/questions/14102955/java-why-do-you-need-to-specify-an-f-in-a-float-literal...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

196 views

1 answer

Android-studio 3.4.0-3.4.2 Gradle ERROR: No value has been specified for property 'manifestOutputDirectory'

when upgrading to android-studio 3.4.x/gradle build plugin 3.4.x /gradle 5.3 ... wondering if its an issue with ... -0-3-4-2-gradle-error-no-value-has-been-specified-for-propert...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

355 views

1 answer

php - How to send additional data using PLupload?

I'm using plupload to make an ajax file uploading. Now the plupload.Uploader class has many options but none ... .com/questions/9535462/how-to-send-additional-data-using-plupload...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

85 views

1 answer

javascript - Add content to a new open window

I don't know how to solve this issue, I've trying reading many post but no one answer to it. I need to ... ://stackoverflow.com/questions/10472927/add-content-to-a-new-open-window...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

218 views

1 answer

How can I stop python.exe from closing immediately after I get an output?

(This question already has answers here): question from:https://stackoverflow.com/questions/3591807/how-can-i-stop-python-exe-from-closing-immediately-after-i-get-an-output...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

185 views

1 answer

How do I show statistics for author's contributions in git?

(Closed.) This question does not meet Stack Overflow guidelines. It is not currently accepting answers. question from: ... how-do-i-show-statistics-for-authors-contributions-in-git...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

100 views

1 answer

ruby - Using factory_girl in Rails with associations that have unique constraints. Getting duplicate errors

I'm working with a Rails 2.2 project working to update it. I'm replacing existing fixtures with factories ... -girl-in-rails-with-associations-that-have-unique-constraints-gett...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

Categories

Recent questions

Just Browsing Browsing

Most popular tags