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How to query as GROUP BY in django?
...nnotate(dcount=Count('designation'))
This results in a query similar to
SELECT designation, COUNT(designation) AS dcount
FROM members GROUP BY designation
and the output would be of the form
[{'designation': 'Salesman', 'dcount': 2},
{'designation': 'Manager', 'dcount': 2}]
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Flatten List in LINQ
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Try SelectMany()
var result = iList.SelectMany( i => i );
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Cloning a MySQL database on the same MySql instance
...IN db_a:
CREATE TABLE db_b.tbl LIKE db_a.tbl;
INSERT INTO db_b.tbl SELECT * FROM db_a.tbl;
The reason I'm not using the CREATE TABLE ... SELECT ... syntax is to preserve indices. Of course this only copies tables. Views and procedures are not copied, although it can be done in the same man...
What exactly does git's “rebase --preserve-merges” do (and why?)
...her part. The differences with --preserve-merges concern which commits are selected for replay and how that replaying works for merge commits.
To be more explicit about the main differences between normal and merge-preserving rebase:
Merge-preserving rebase is willing to replay (some) merge commi...
UINavigationController without navigation bar?
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In Xcode 4.3.2:
Select the navigation controller in the storyboard
Select the Attributes Inspector in the (right) Utilities panel
Under the Navigation Controller category you have two check boxes:
[] Shows Navigation Bar
[] Shows Toolbar
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How to generate Javadoc HTML files in Eclipse?
...wing shortcut:
Windows: alt + shift + J
Mac: ⌘ + Alt + J
Depending on selected context, a Javadoc will be printed. To create Javadoc written by OP, select corresponding method and hit the shotcut keys.
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JPA: what is the proper pattern for iterating over large result sets?
...essSession();
Query query = session
.createQuery("SELECT a FROM Address a WHERE .... ORDER BY a.id");
query.setFetchSize(Integer.valueOf(1000));
query.setReadOnly(true);
query.setLockMode("a", LockMode.NONE);
ScrollableResults results = query....
Forking from GitHub to Bitbucket
...epo on bitbucket.org
Here are the steps:
Click on the Create button and select Repository ('+' > Repository)
Now, instead of creating a new repository select a import repository from the top right corner of the modal that pops up.
fill in your github repo's URL and your authentication credenti...
How do I undo “Scope to this” in Visual Studio 2012?
...orward and back buttons.
Extra:
You can also right click on projects and select 'New Solution Explorer Window' to have two separate solution explorers which can browse independently (note that changing the settings on one will effect the other).
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What does a space mean in a CSS selector? i.e. What is the difference between .classA.classB and .cl
What is the difference between these two selectors?
3 Answers
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