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C# Thread safe fast(est) counter
...ent locks the bus to prevent another CPU from accessing the bus while the calling CPU does its operation. Now, take a look at the C# lock() statement's IL. Here you will see calls to Monitor in order to begin or end a section.
In other words, .Net lock() statement is doing a lot more than the .Ne...
How do I find duplicates across multiple columns?
...simple and efficient means to locate unwanted repetition, whilst also list all affected rows and all wanted columns:
SELECT
t.*
FROM (
SELECT
s.*
, COUNT(*) OVER (PARTITION BY s.name, s.city) AS qty
FROM stuff s
) t
WHERE t.qty > 1
ORDER BY t.name, t.city
While most...
When exactly are onSaveInstanceState() and onRestoreInstanceState() called?
...id onRestoreInstanceState (Bundle savedInstanceState)
This method is called between onStart() and onPostCreate(Bundle).
void onSaveInstanceState (Bundle outState)
If called, this method will occur after onStop() for applications targeting platforms starting with Build.VERSION_CODES.P....
Downloading MySQL dump from command line
..., then:
$ mysqldump -u [uname] -p db_name > db_backup.sql
If it's all DBs, then:
$ mysqldump -u [uname] -p --all-databases > all_db_backup.sql
If it's specific tables within a DB, then:
$ mysqldump -u [uname] -p db_name table1 table2 > table_backup.sql
You can even go as f...
Where do the Python unit tests go?
...
For a file module.py, the unit test should normally be called test_module.py, following Pythonic naming conventions.
There are several commonly accepted places to put test_module.py:
In the same directory as module.py.
In ../tests/test_module.py (at the same level as t...
get current url in twig template?
...ttributes.get('_route_params')) %}
The app global view variable contains all sorts of useful shortcuts, such as app.session and app.security.token.user, that reference the services you might use in a controller.
share
...
Remove Select arrow on IE
...nt.
Examples of Custom Cross Browser Drop-down in action: check them with all your browsers to see the cross-browser feature.
Anyway, let's start with the modern browsers and then we will see the solution for the older ones.
Drop-down Arrow for Chrome, Firefox, Opera, Internet Explorer 10+
For t...
Why define an anonymous function and pass it jQuery as the argument?
...de demo code from the backbone.js screencasts. In it, the backbone code is all enclosed in an anonymous function that is passed the jQuery object:
...
Is it possible to override the configuration of a plugin already defined for a profile in a parent P
....1 of org.jenkins-ci.plugins in the pom.xml using Maven 3.3.9. Until I manually changed the <source> to 1.7 in the ~/.m2/repository/org/jenkins-ci/jenkins/1.34/jenkins-1.34.pom nothing worked.
– Alexander Samoylov
Jun 16 at 10:56
...
How do you get a list of the names of all files present in a directory in Node.js?
I'm trying to get a list of the names of all the files present in a directory using Node.js. I want output that is an array of filenames. How can I do this?
...