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How to pass a function as a parameter in Java? [duplicate]
...parated list of formal parameters enclosed in parentheses. The CheckPerson.test method contains one parameter, p,
which represents an instance of the Person class.Note: You
can omit the data type of the parameters in a lambda expression. In
addition, you can omit the parentheses if there is on...
Select n random rows from SQL Server table
...s not even retrieve data that it will not return.
On a very large table I tested
select top 1 percent * from [tablename] order by newid()
took more than 20 minutes.
select * from [tablename] tablesample(1 percent)
took 2 minutes.
Performance will also improve on smaller samples in TABLESAMP...
Why can I not push_back a unique_ptr into a vector?
...unique_ptr into vector? It's extremely slow compared with raw pointer as I tested.
– user2189731
Apr 9 at 7:35
add a comment
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How can I get a list of build targets in Ant?
...you ask yourself ... I was creating a standalone ant env which I'd like to test within Eclipse ... of course I've got my Ant View there)
– Andreas Dietrich
Jul 23 '14 at 12:23
...
What Product Flavor does Android Studio build by default in build.gradle?
...ecified alphabetically. Is there a way to tell Android Studio to build and test only a specific product flavor during development?
...
How to deal with persistent storage (e.g. databases) in Docker
...: "/mnt/sda1/var/lib/docker/volumes/mypthonapp_db-data/_data"
}
]
Some testing:
# Start the containers
docker-compose up -d
# .. input some data into the database
docker-compose run --rm web python manage.py migrate
docker-compose run --rm web python manage.py createsuperuser
...
# Stop and r...
How can I make a JPA OneToOne relation lazy
...
Maybe there is another option, but I have not personally tested it: on non constrained side, use a one-to-one with a formula like select other_entity.id from other_entity where id = other_entity.id. Of course, this is not ideal for query performances.
– Fréd...
Redirect stdout to a file in Python?
...e object does the trick:
import sys
sys.stdout = open('file', 'w')
print('test')
A far more common method is to use shell redirection when executing (same on Windows and Linux):
$ python foo.py > file
share
...
How does comparison operator works with null int?
...= null in VB whereas null != 1 = true in C# - I have been using LinqPad to test the statements
– Luke T O'Brien
May 24 '17 at 10:13
2
...
How do you install Google frameworks (Play, Accounts, etc.) on a Genymotion virtual device? [duplica
...gratulations: you now have ARM support and Google Play fully set up!
I've tested this on Genymotion v2.0.1-v2.1 using Android 4.3 and 4.4 images. Feel free to skip the GApps steps if you only want the ARM support. It'll work perfectly fine by itself.
Old Zips: v1.0. Don't download these as they wi...