OStack Q&A-Knowledge Sharing Community

0 votes

250 views

1 answer

optimization - What are the implications of running python with the optimize flag?

I cannot seem to find a good simple explanation of what python does differently when running with the -O or ... what-are-the-implications-of-running-python-with-the-optimize-flag...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

454 views

1 answer

qt4 - Qt 4.5 - Is emitting signal a function call, or a thread, and does it blocks?

I am not sure about the nature of the signal/slot mechanism in Qt 4.5. When a signal is emitted, is it a ... is-emitting-signal-a-function-call-or-a-thread-and-does-it-blocks...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

366 views

1 answer

java - Missing artifact com.oracle:ojdbc6:jar:11.2.0 in pom.xml

I am using Eclipse Luna and working on a maven project. When I add the entry for ojdbc jar in pom.xml ... /questions/25128219/missing-artifact-com-oracleojdbc6jar11-2-0-in-pom-xml...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

635 views

1 answer

gitignore - How do I ignore file extensions in git regardless of case?

I want to tell git to ignore e.g. jpg files regardless of how the extension is written. e.g. *.jpg should ... /11116636/how-do-i-ignore-file-extensions-in-git-regardless-of-case...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

169 views

1 answer

multithreading - How to "multithread" C code

I have a number crunching application written in C. It is kind of a main loop that for each value calls, ... :https://stackoverflow.com/questions/3908031/how-to-multithread-c-code...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

187 views

1 answer

iphone - Where can I find a CSV to NSArray parser for Objective-C?

(Closed.) This question does not meet Stack Overflow guidelines. It is not currently accepting answers. question from:https:/ ... can-i-find-a-csv-to-nsarray-parser-for-objective-c...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

162 views

1 answer

Scala, repeat a finite list infinitely

I want to use Stream class in scala to repeat a given list infinitely. For example the list (1,2,3, ... ://stackoverflow.com/questions/2097851/scala-repeat-a-finite-list-infinitely...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

66 views

1 answer

c# - Create Directory + Sub Directories

I've got a directory location, how can I create all the directories? e.g. C:MatchUpload will ... :https://stackoverflow.com/questions/1680836/create-directory-sub-directories...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

177 views

1 answer

How to update a git shallow clone?

Background (for tl;dr, see #questions below) I have multiple git repository shallow clones. I'm using shallow clones ... .com/questions/41075972/how-to-update-a-git-shallow-clone...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

123 views

1 answer

python - Count number of non-NaN entries in each column of Spark dataframe with Pyspark

I have a very large dataset that is loaded in Hive. It consists of about 1.9 million rows and 1450 columns. I ... -of-non-nan-entries-in-each-column-of-spark-dataframe-with-pyspark...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

243 views

1 answer

How do you manage multiple environments while developing Android apps?

We're building an Android app that connects to the cloud. We have a test URL for our APIs and a ... /22995057/how-do-you-manage-multiple-environments-while-developing-android-apps...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

92 views

1 answer

java - Get bluetooth signal strength

I want to get the Bluetooth signal strength of an another device which connected to my phone, How can ... https://stackoverflow.com/questions/15312858/get-bluetooth-signal-strength...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

434 views

1 answer

regex - Removing non-alphanumeric characters with sed

I am trying to validate some inputs to remove a set of characters. Only alphanumeric characters plus, ... .com/questions/20007288/removing-non-alphanumeric-characters-with-sed...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

284 views

1 answer

mysql - How do I find if my a table is MyISAM or Innodb

(This question already has answers here): question from:https://stackoverflow.com/questions/3681790/how-do-i-find-if-my-a-table-is-myisam-or-innodb...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

160 views

1 answer

CSS selectors ul li a {...} vs ul > li > a {...}

What is the difference between ul > li > a {...} and ul li a {...} in CSS? Which one is more efficient ... ://stackoverflow.com/questions/11227322/css-selectors-ul-li-a-vs-ul-li-a...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

270 views

1 answer

c - error: function returns address of local variable

I'm beginner with C and I am learning on my own. I am creating the following function: char * ... .com/questions/12380758/error-function-returns-address-of-local-variable...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

137 views

1 answer

sql server - Hide SQL database from Management Studio

How can you hide databases you do not have access rights to when logging into SQL Server 2005 / 2008 ... stackoverflow.com/questions/935018/hide-sql-database-from-management-studio...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

170 views

1 answer

Circular dependencies cannot exist in RelativeLayout, android?

I have the following layout: I need to keep the button at the bottom of screen and it should ... com/questions/23904281/circular-dependencies-cannot-exist-in-relativelayout-android...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

103 views

1 answer

android - How to access values from strings.xml

How can I access values from strings.xml in kotlin android? class MainActivity : AppCompatActivity(), View. ... /questions/44871481/how-to-access-values-from-strings-xml...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

185 views

1 answer

Unable to mount SAMSUNG_Android in UBUNTU

When i enable USB debugging in android phone and connect it to Ubuntu i get popup like Unable to mount ... .com/questions/15055304/unable-to-mount-samsung-android-in-ubuntu...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

512 views

1 answer

regex - variable capture in Nginx location matching

Let's say I have a URL like this: www.example.com/a/b/sth, and I write a location block in ... ://stackoverflow.com/questions/13706658/variable-capture-in-nginx-location-matching...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

266 views

1 answer

r - Create a sequential number (counter) for rows within each group of a dataframe

(This question already has answers here): question from:https://stackoverflow.com/questions/11996135/create-a-sequential-number-counter-for-rows-within-each-group-of-a-dataframe...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

621 views

1 answer

xcode - Playground Import: No Such Module 'Foo'

I've diligently followed the Apple instructions to import a custom module into a playground, including the ... .com/questions/33144877/playground-import-no-such-module-foo...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

125 views

1 answer

haskell - Are typeclasses essential?

I once asked a question on haskell beginners, whether to use data/newtype or a typeclass. In my ... from:https://stackoverflow.com/questions/25855507/are-typeclasses-essential...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

419 views

1 answer

Core Data: Query objectIDs in a predicate?

I am fetching a set of objects from a Core Data persistent store using a fetch request and a predicate. ... .com/questions/941357/core-data-query-objectids-in-a-predicate...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

176 views

1 answer

php - Laravel 5.3 date validator: equal to or after start_date

I'm using Laravel 5.3 to validate start_date and end_date for an event. end_date should be equal to start_date or the ... /laravel-5-3-date-validator-equal-to-or-after-start-date...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

174 views

1 answer

javascript - React-Native: Convert image url to base64 string

I'm building a react native app that needs to store images at base64 string format for offline viewing ... questions/34908009/react-native-convert-image-url-to-base64-string...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

784 views

1 answer

shell - getting error /usr/bin/env: sh: No such file or directory when running command play

I am a beginner on Play framework . I just extract Play framework files and extracted them and gave the path of play ... bin-env-sh-no-such-file-or-directory-when-running-command-p...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

Categories

Recent questions

Just Browsing Browsing

Most popular tags